Records |
Author |
Dekov, V.M.; Subramanian, V.; Van Grieken, R. |
Title |
Chemical composition of suspended matter and sediments from the Indian sub-continent: a fifteen-year research survey |
Type |
H3 Book chapter |
Year |
1998 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
81-92
T2 - Recent trends in environmental biogeoch |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:22778 |
Serial |
7659 |
Permanent link to this record |
|
|
|
Author |
Torfs, K.; Van Grieken, R. |
Title |
Chemical relations between atmospheric aerosols, deposition and stone decay layers on historic buildings at the Mediterranean coast |
Type |
A1 Journal article |
Year |
1997 |
Publication |
Atmospheric environment : an international journal |
Abbreviated Journal |
|
Volume |
31 |
Issue |
|
Pages |
2179-2192 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1352-2310 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:18777 |
Serial |
7660 |
Permanent link to this record |
|
|
|
Author |
Ro, C.-U.; Oh, K.-Y.; Kim, H.K.; Chun, Y.; Osán, J.; de Hoog, J.; Van Grieken, R. |
Title |
Chemical speciation of individual atmospheric particles using low-Z electron probe X-ray microanalysis characterizing “Asian Dust” deposited with rainwater in Seoul, Korea |
Type |
A1 Journal article |
Year |
2001 |
Publication |
Atmospheric environment : an international journal |
Abbreviated Journal |
|
Volume |
35 |
Issue |
|
Pages |
4995-5005 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000171443800009 |
Publication Date |
2002-10-31 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1352-2310 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:36089 |
Serial |
7661 |
Permanent link to this record |
|
|
|
Author |
Roekens, E.; Komy, Z.; Leysen, L.; Veny, P.; Van Grieken, R. |
Title |
Chemistry of precipitation near a limestone building |
Type |
A1 Journal article |
Year |
1988 |
Publication |
Water, air and soil pollution |
Abbreviated Journal |
|
Volume |
38 |
Issue |
3/4 |
Pages |
273-282 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
A total of 82 samples of wet and total deposition were sampled near the limestone cathedral at Mechelen, Belgium, which is presently being affected seriously by air pollution, and at a reference site. Most of these samples were analyzed for 10 major and 7 trace ions in solution and for 15 elements in suspension. It appeared that calcite, released from the building, effectively neutralizes the rainwater in the near vicinity and produces high Ca and bicarbonate concentrations. Heavy metal concentrations are hardly affected by the building. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
2014-08-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0049-6979; 1573-2932 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116806 |
Serial |
7663 |
Permanent link to this record |
|
|
|
Author |
Vercauteren, J.; Matheeussen, C.; Wauters, E.; Roekens, E.; Van Grieken, R.; Krata, A.; Makarovska, Y.; Maenhaut, W.; Chi, X.; Geypens, B. |
Title |
Chemkar PM10 : an extensive look at the local differences in chemical composition of PM10 in Flanders, Belgium |
Type |
A1 Journal article |
Year |
2011 |
Publication |
Atmospheric environment : an international journal |
Abbreviated Journal |
|
Volume |
45 |
Issue |
1 |
Pages |
108-116 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
The results of Chemkar PM10, the first large scale chemical characterisation project of PM10 in Flanders are presented. Between September 2006 and September 2007 a total of 365 PM10 samples were collected by sampling every sixth day at six different sites in Flanders (Belgium) varying in character from urban background to rural. Samples were analysed for a series of elements, elemental and organic carbon, 13C/12C- and 15N/14N-isotopic ratios, and water-soluble ions. At three sites extra sampling was carried out to determine PAHs by means of a novel technique that uses sorption tubes consisting of polydimethylsiloxane (PDMS) foam, PDMS particles and a TENAX TA bed. Results showed that the most important fractions were secondary inorganic ions (nitrate, sulphate and ammonium): 41% (12.6 μg m−3), organic matter: 20% (6.1 μg m−3), crustal matter: 14% (4.3 μg m−3), sea salt: 8% (2.4 μg m−3) and elemental carbon: 4% (1.2 μg m−3). Although the general composition profile was rather similar for the six sites, substantial differences could be observed for some main components and for several trace metals such as chromium, copper, zinc, arsenic and lead. Although the average sum of the PAH 16 was quite variable between the three sites (between 132 and 248 ng m−3) the average sum of the PAH 7 was between 7 and 9 ng m−3 for the three sites. The largest relative differences between sites were found for elemental carbon and crustal matter, thereby indicating that there is some potential for local measures to reduce the concentrations of particulate matter by a few μg m−3. Both for carbon and nitrogen isotopic ratios significant differences in time were observed. Isotopic differences in location could only be detected for carbon. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000285675600010 |
Publication Date |
2010-09-30 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1352-2310 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:85917 |
Serial |
7664 |
Permanent link to this record |
|
|
|
Author |
Camuffo, D.; Pagan, E.; Schellen, H.; Van Grieken, R.; Bencs, L.; et al. |
Title |
Church heating and cultural heritage conservation : guide to the analysis of pros and cons of various heating systems |
Type |
MA2 Book as author |
Year |
2006 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
240 p. |
Keywords |
MA2 Book as author; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
88-370-5034-8 |
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:117468 |
Serial |
7665 |
Permanent link to this record |
|
|
|
Author |
Bondarenko, I.; van Espen, P.; Treiger, B.; Van Grieken, R.; Adams, F. |
Title |
Classification of coal mine dust particles through fuzzy clustering of their energy-dispersive electron microprobe X-ray spectra |
Type |
A1 Journal article |
Year |
1994 |
Publication |
Microbeam analysis |
Abbreviated Journal |
|
Volume |
3 |
Issue |
|
Pages |
33-37 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Chemometrics (Mitac 3) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1061-3420 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:8916 |
Serial |
7667 |
Permanent link to this record |
|
|
|
Author |
Bernard, P.C.; Van Grieken, R.E.; Eisma, D. |
Title |
Classification of estuarine particles using automated electron-microprobe analysis and multivariate techniques |
Type |
A1 Journal article |
Year |
1986 |
Publication |
Environmental science and technology |
Abbreviated Journal |
|
Volume |
20 |
Issue |
5 |
Pages |
467-473 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1986C117800013 |
Publication Date |
2005-03-17 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0013-936x; 1520-5851 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:113614 |
Serial |
7668 |
Permanent link to this record |
|
|
|
Author |
Treiger, B.; Bondarenko, I.; van Espen, P.; Van Grieken, R.; Adams, F. |
Title |
Classification of mineral particles by nonlinear mapping of electron microprobe energy-dispersive X-ray spectra |
Type |
A1 Journal article |
Year |
1994 |
Publication |
The analyst |
Abbreviated Journal |
|
Volume |
119 |
Issue |
|
Pages |
971-974 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Chemometrics (Mitac 3) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1994NR76500037 |
Publication Date |
2004-03-24 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:8918 |
Serial |
7669 |
Permanent link to this record |
|
|
|
Author |
Leysen, L.A.; Roekens, E.J.; Storms, H.; Van Grieken, R.E. |
Title |
Classification of suspended particles in deposition samples and run-off water samples from a limestone cathedral |
Type |
A1 Journal article |
Year |
1987 |
Publication |
Atmospheric environment |
Abbreviated Journal |
|
Volume |
21 |
Issue |
11 |
Pages |
2425-2433 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
In a study on the mechanism of the air-pollution induced deterioration of the limestone St. Rombouts cathedral in Mechelen, Belgium, automated electron-probe X-ray micro-analysis combined with multivariate analysis was used to characterize the suspension particles in run-off water and in local wet and dry deposition samples. Altogether about 10,000 individual particles were sized, analyzed and classified, according to their chemical composition. It was found that the run-off water samples were highly enriched in CaCO3 particles, resulting from the stone-erosion by overflowing rainwater, while the Si-rich group was the most abundant one in the deposition samples. Several other particle types were found. Ion chromatography analysis of the run-off water showed 2001700mg l−1 of sulphate and 20110mg l−1 of nitrate. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
2003-08-06 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0004-6981 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116454 |
Serial |
7670 |
Permanent link to this record |
|
|
|
Author |
Alemam, E. |
Title |
Cleaning of wall paintings by Polyvinyl alcohol–Borax/Agarose (PVA–B/AG) double network hydrogels : characterization, assessment, and applications |
Type |
Doctoral thesis |
Year |
2021 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
184 p. |
Keywords |
Doctoral thesis; Engineering sciences. Technology; Art; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES); Antwerp X-ray Imaging and Spectroscopy (AXIS) |
Abstract |
Wall paintings make up an important section of cultural heritage. They resemble time portals that can be used to travel back into the past and witness the life of our ancestors. In these paintings, the ancient artists depicted the different aspects of their life, such as cooking, baking, farming, manufacturing, as well as thoughts and beliefs. Unfortunately, wall paintings are susceptible to degradation over time in the form of the accumulations of dirt and deposits on the painted surfaces and loss of adhesion of the paint layers at the surface. Therefore, the removal of these deposits is one of the primary duties of conservator-restorers. Such operations are intended to restore the painted surface to a condition close enough to its original state. Since cleaning artworks may cause undesirable physicochemical alterations and is nonreversible, the proper cleaning procedure should be adopted. In this regard, numerous gels have been developed and exploited for the cleaning of various artwork surfaces. Lately, polyvinyl alcohol-borax (PVA-B) and agarose (AG) hydrogels have been widely employed as cleaning materials by conservator-restorers. However, both hydrogels have shown limitations in specific cleaning practices. In this work, we investigated a new double network hydrogel based on blending PVA-B and agarose to avoid the limitations posed by the constituting hydrogels. For this reason, a detailed characterization of the PVA–B/AG double network hydrogel was performed, including chemical structure, liquid phase retention, mechanical strength, rheological behavior, and self-healing behavior of various PVA-B/AG hydrogels. These new hydrogels revealed better properties than PVA-B and agarose hydrogels and obviated their limitations. A laboratory experiment on the removal of deteriorated Paraloid® B72 proved that the PVA-B/AG hydrogel loaded 10%/10% MEK/1-PeOH was able to remove these layers efficiently. Therefore, the hydrogel was tested on a wall painting from the Temple of Seti I in Abydos – Egypt. It removed the glossy/darkened consolidant from the wall painting and restored the original matt appearance of the painted surface. In another application on the painted ceiling of the same temple, the hydrogel was tested for removing thick soot layers. The hydrogel formulation (loaded with 5% ammonia, 0.3% ammonium carbonate, and 0.3% EDTA) removed these layers with no noticeable damage to the paint layers. In a wide-scale application of the hydrogel (loaded with 10% propylene carbonate), it removed a highly deteriorated varnish layer from a 19-c wall painting. All the traditional cleaning methods employed caused damage to the paint layers, proving that gel cleaning can be a safer cleaning alternative in some cases. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:183381 |
Serial |
7671 |
Permanent link to this record |
|
|
|
Author |
Anaf, W.; Schalm, O. |
Title |
Climatic quality evaluation by peak analysis and segregation of low-, mid-, and high-frequency fluctuations, applied on a historic chapel |
Type |
A1 Journal article |
Year |
2019 |
Publication |
Building and environment |
Abbreviated Journal |
|
Volume |
148 |
Issue |
|
Pages |
286-293 |
Keywords |
A1 Journal article; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES) |
Abstract |
Heritage-related guidelines and standards recommend stable climatic conditions, since these contribute to the extension of heritage collections life. As a result, numerous museums and other heritage institutions implement (expensive) mitigation measures to achieve stable conditions. Nevertheless, temperature and relative humidity fluctuations are often still observed. This contribution demonstrates that the analysis of temperature and humidity peaks and drops helps to identify hazards which cause fluctuations in different frequency ranges. This hazard identification provides information on the type of mitigation actions that are required in the near future and in which order they need to be implemented. The approach is illustrated with a case study. A 22 month monitoring campaign was performed in a chapel in the center of Antwerp (Belgium) where the climatic conditions are controlled with a heating, ventilation and air conditioning (HVAC) system. Low-, mid- and high-frequency fluctuations were separated and discussed for their hazards. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000457116500024 |
Publication Date |
2018-11-15 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0360-1323 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:157569 |
Serial |
7672 |
Permanent link to this record |
|
|
|
Author |
Hillen, M.; Legrand, S.; Dirkx, Y.; Janssens, K.; van der Snickt, G.; Caen, J.; Steenackers, G. |
Title |
Cluster analysis of IR thermography data for differentiating glass types in historical leaded-glass windows |
Type |
A1 Journal article |
Year |
2020 |
Publication |
Applied Sciences-Basel |
Abbreviated Journal |
Appl Sci-Basel |
Volume |
10 |
Issue |
12 |
Pages |
4255-13 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Antwerp Cultural Heritage Sciences (ARCHES); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Infrared thermography is a fast, non-destructive and contactless testing technique which is increasingly used in heritage science. The aim of this study was to assess the ability of infrared thermography, in combination with a data clustering approach, to differentiate between the different types of historical glass that were included in a colorless leaded-glass windows during previous restoration interventions. Inspection of the thermograms and the application of two data mining techniques on the thermal data, i.e., k-means clustering and hierarchical clustering, allowed identifying different groups of window panes that show a different thermal behavior. Both clustering approaches arrive at similar groupings of the glass with a clear separation of three types. However, the lead cames that hold the glass panes appear to have a substantial impact on the thermal behavior of the surrounding glass, thus preventing classification of the smallest glass panes. For the larger panes, this was not a critical issue as the center of the glass remained unaffected. Subtle visual color differences between panes, implying a variation in coloring metal ions, was not always distinguished by IRT. Nevertheless, data clustering assisted infrared thermography shows potential as an efficient and swift method for documenting the material intervention history of leaded-glass windows during or in preparation of conservation treatments. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000549351800001 |
Publication Date |
2020-06-22 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
2076-3417 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
2.7 |
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
Most recent IF: 2.7; 2020 IF: 1.679 |
Call Number |
UA @ admin @ c:irua:170012 |
Serial |
7674 |
Permanent link to this record |
|
|
|
Author |
Vanderstappen, M.G.; Van Grieken, R.E. |
Title |
Co-crystallization with 1-(2-pyridylazo)-2-naphthol, and X-ray fluorescence, for trace metal analysis of water |
Type |
A1 Journal article |
Year |
1978 |
Publication |
Talanta : the international journal of pure and applied analytical chemistry |
Abbreviated Journal |
|
Volume |
25 |
Issue |
11/12 |
Pages |
653-658 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Adding 20mg of 1-(2-pyridylazo)-2-naphthol (PAN) to a water sample at 70°, and filtering off the precipitate after cooling, gives efficient preconcentration prior to X-ray fluorescence analysis of water. Up to the capacity of about 100 μeq of PAN used, the trace metal recoveries are around 90% or higher for Cr3+, Mn2+, Ni2+, Cu2+, Zn2+, Hg2+ and Eu3+, and above 70% for many other ions. The recovery yields usually do not vary critically with pH in the neutral pH-range, and are practically independent of the sample salinity, sample volume and trace-metal concentration. Enrichment factors as high as 2 × 105 can be achieved. Counting statistics would then allow detection limits of 0.03 ppM. The blank levels in commercial PAN, however, lead to typical detection limits of about 1 ppm. The coefficient of variation is typically in the 510% range at the 10-ppM level. The accuracy and applicability of the procedure are illustrated by comparative analyses on samples of synthetic solutions, river and drinking water. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1978GG18200005 |
Publication Date |
2002-07-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0039-9140; 1873-3573 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116556 |
Serial |
7675 |
Permanent link to this record |
|
|
|
Author |
Chakravorty, R.; Van Grieken, R. |
Title |
Co-precipitation with iron hydroxide and X-ray fluorescence analysis of trace metals in water |
Type |
A1 Journal article |
Year |
1982 |
Publication |
International journal of environmental analytical chemistry |
Abbreviated Journal |
|
Volume |
11 |
Issue |
1 |
Pages |
67-80 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Preconcentration of transition trace ions by coprecipitation on iron-hydroxide has been combined with energy-dispersive X-ray fluorescence for environmental water analysis. The optimized preconcentration procedure implies adding 2 mg of iron to a 200 ml water sample, adding dilute NaOH up to pH 9, filtering off on a Nuclepore membrane after a 1 h equilibration time, and analyzing. Quantitative recoveries could then be obtained for Ni, Cu, Zn and Pb, e.g. at the 10 μg/l level in waters of varying salinity while Mn was partially collected. (In fact, for a given problem the iron carrier amount can be adjusted to obtain a satisfactory compromise between high recovery and low detection limit). The precision is 7-8% at the 10 μg/l level, and the detection limits are in the 0.5-1 μg/l range. Various environmental water samples are analysed by way of illustration. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1982NG99200007 |
Publication Date |
2007-07-07 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0306-7319 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116573 |
Serial |
7676 |
Permanent link to this record |
|
|
|
Author |
Lachmann, T.; van der Snickt, G.; Haschke, M.; Mantouvalou, I. |
Title |
Combined 1D, 2D and 3D micro-XRF techniques for the analysis of illuminated manuscripts |
Type |
A1 Journal article |
Year |
2016 |
Publication |
Journal of analytical atomic spectrometry |
Abbreviated Journal |
|
Volume |
31 |
Issue |
10 |
Pages |
1989-1997 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
The combination of several micro-XRF analysis modes is presented for the investigation of an illuminated parchment manuscript. With a commercial instrument, conventional micro-XRF spot analysis (0D) and mapping (2D) are performed, yielding detailed lateral elemental information. Depth resolution becomes accessible by mounting an additional polycapillary lens in front of an SDD detector. Quantitative confocal depth profiles (1D) are presented as well as the full separation of the front and the backside decorations with the help of fast 3D mappings of specific areas. Only through the use of these multidimensional modes can elemental information be assigned both to lateral and depth positions, making the analysis of such heterogeneous samples feasible. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000385362200004 |
Publication Date |
2016-08-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0267-9477 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:144755 |
Serial |
7679 |
Permanent link to this record |
|
|
|
Author |
Stefaniak, E.A.; Alsecz, A.; Frost, R.; Máthé, Z.; Sajó, I.E.; Török, S.; Worobiec, A.; Van Grieken, R. |
Title |
Combined SEM/EDX and micro-Raman spectroscopy analysis of uranium minerals from a former uranium mine |
Type |
A1 Journal article |
Year |
2009 |
Publication |
Journal of hazardous materials |
Abbreviated Journal |
|
Volume |
168 |
Issue |
1 |
Pages |
416-423 |
Keywords |
A1 Journal article; Laboratory Experimental Medicine and Pediatrics (LEMP); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Samples of the secondary uranium minerals collected in the abandoned uranium mine at Pecs (Hungary) were investigated by two micro-techniques: scanning electron microscopy (SEM/EDX) and micro-Raman spectroscopy (MRS). They were applied to locate U-rich particles and identify the chemical form and oxidation state of the uranium compounds. The most abundant mineral was a K and/or Na uranyl sulphate (zippeite group). U(VI) was also present in the form showing intensive Raman scattering at 860 cm−1 which can be attributed to uranium trioxide. This research has shown the successful application of micro-Raman spectroscopy for the identification of uranyl mineral species on the level of individual particles. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000267567600060 |
Publication Date |
2009-02-22 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0304-3894 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:77032 |
Serial |
7681 |
Permanent link to this record |
|
|
|
Author |
Klepka, M.; Lawniczak-Jablonska, K.; Jablonski, M.; Wolska, A.; Minikayev, R.; Paszkowicz, W.; Przepiera, A.; Spolnik, Z.; Van Grieken, R. |
Title |
Combined XRD, EPMA and X-ray absorption study of mineral ilmenite used in pigments production |
Type |
A1 Journal article |
Year |
2005 |
Publication |
Journal of alloys and compounds |
Abbreviated Journal |
|
Volume |
401 |
Issue |
1/2 |
Pages |
281-288 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000232267700050 |
Publication Date |
2005-05-24 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0925-8388 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:54562 |
Serial |
7682 |
Permanent link to this record |
|
|
|
Author |
Górka, M.; Jedrysek, M.O.; Maj, J.; Worobiec, A.; Buczyńska, A.; Stefaniak, E.; Krata, A.; Van Grieken, R.; Zwozdziak, A.; Sówka, I.; Zwozdziak, J.; Lewicka-Szczebak, D. |
Title |
Comparative assessment of air quality in two health resorts using carbon isotopes and palynological analyses |
Type |
A1 Journal article |
Year |
2009 |
Publication |
Atmospheric environment |
Abbreviated Journal |
|
Volume |
43 |
Issue |
3 |
Pages |
682-688 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP) |
Abstract |
This paper describes results of applying the palynological and carbon isotopic analysis of the organic fraction of Total Suspended Particles (TSP) to discriminate distinct pollution sources and assess the anthropogenic impact for the investigated areas. The samples of atmospheric particles were collected in Czerniawa and Cieplice (two health resorts in Lower Silesia, SW Poland) twice a year in summer and winter season (from July 2006 to February 2008). The palynological spectra represent in the vast majority local plant communities without a noticeable contribution of long-transported plant particles. Palynological analysis revealed also differences in the specificity of the two sampling areas, i.e. the higher contribution of identified organic material in Czerniawa stands for more natural character of this site, but is also responsible for the higher allergic pressure when compared to Cieplice. The carbon isotopic composition of TSP varied seasonally (ä13C value from −27.09 in summer to −25.47 in winter). The increased ä13C value in winter (heating period) is most probably caused by uncontrolled contribution of coal soot. On the basis of isotopic mass balance the calculated contribution of anthropogenic organic particles in the atmosphere reached in winter season 72% in Czerniawa and 79% in Cieplice. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000262737900024 |
Publication Date |
2008-10-15 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1352-2310 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:72492 |
Serial |
7686 |
Permanent link to this record |
|
|
|
Author |
Stranger, M.; Potgieter-Vermaak, S.S.; Van Grieken, R. |
Title |
Comparative overview of indoor air quality in Antwerp, Belgium |
Type |
A1 Journal article |
Year |
2007 |
Publication |
Environment international |
Abbreviated Journal |
|
Volume |
33 |
Issue |
6 |
Pages |
789-797 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000248273700010 |
Publication Date |
2007-03-31 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0160-4120 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:64632 |
Serial |
7687 |
Permanent link to this record |
|
|
|
Author |
Bernard, P.C.; Van Grieken, R.E. |
Title |
Comparison and evaluation of hierarchical cluster techniques applied to automated electron probe X-ray microanalysis data |
Type |
A1 Journal article |
Year |
1992 |
Publication |
Analytica chimica acta |
Abbreviated Journal |
|
Volume |
267 |
Issue |
|
Pages |
81-92 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1992JM65200009 |
Publication Date |
2002-07-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0003-2670; 1873-4324 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:2838 |
Serial |
7688 |
Permanent link to this record |
|
|
|
Author |
de Gendt, S.; Van Grieken, R.; Hang, W.; Harrison, W.W. |
Title |
Comparison between direct current and radiofrequency glow discharge mass spectrometry for the analysis of oxide-based samples |
Type |
A1 Journal article |
Year |
1995 |
Publication |
Journal of analytical atomic spectrometry |
Abbreviated Journal |
|
Volume |
10 |
Issue |
|
Pages |
689-695 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1995RW12800022 |
Publication Date |
2004-04-20 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0267-9477 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:12352 |
Serial |
7689 |
Permanent link to this record |
|
|
|
Author |
Rojas, C.M.; Van Grieken, R.E.; Laane, R.W. |
Title |
Comparison of 3 dry deposition models applied to field-measurements in the Southern Bight of the North-Sea |
Type |
A1 Journal article |
Year |
1993 |
Publication |
Atmospheric environment |
Abbreviated Journal |
|
Volume |
27 |
Issue |
3 |
Pages |
363-370 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Dry deposition velocities have been calculated using three different approaches. Turbulent wind profile theory has been used to predict the drag coefficient, wind speed and friction velocity at 10 m height when the wind speed is measured at a higher altitude. The resulting parameters were introduced in a two-layer deposition model. The second approach was the well-known model of Slinn and Slinn (1980, Atmospheric Environment 14, 1013-1016), whereas the third corresponded to the model published by Williams (1982, Atmospheric Environment 16, 1933 1938). Results point to clear differences. However, in a field experiment carried out at the Southern Bight of the North Sea, all three approaches show relatively comparable results. The role played by the size distribution of atmospheric particulate matter is essential. In our case any of the three models could have given satisfactory outcomes taking into account the wide spread of the experimental results cited in the literature for the same airshed. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1993KQ75200008 |
Publication Date |
2003-08-06 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0004-6981 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:100018 |
Serial |
7690 |
Permanent link to this record |
|
|
|
Author |
Tsuji, K.; Huisman, M.; Spolnik, Z.; Wagatsuma, K.; Mori, Y.; Van Grieken, R.E.; Vis, R.D. |
Title |
Comparison of grazing-exit particle-induced X-ray emission with other related methods |
Type |
A1 Journal article |
Year |
2000 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
Abbreviated Journal |
|
Volume |
55 |
Issue |
|
Pages |
1009-1016 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000088353100030 |
Publication Date |
2002-07-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0584-8547; 1873-3565 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:31671 |
Serial |
7692 |
Permanent link to this record |
|
|
|
Author |
Bencs, L.; Spolnik, Z.; Limpens-Neilen, D.; Schellen, H.L.; Jütte, B.A.H.G.; Van Grieken, R. |
Title |
Comparison of hot-air and low-radiant pew heating systems on the distribution and transport of gaseous air pollutants in the mountain church of Rocca Pietore from artwork conservation points of view |
Type |
A1 Journal article |
Year |
2007 |
Publication |
Journal of cultural heritage |
Abbreviated Journal |
|
Volume |
8 |
Issue |
3 |
Pages |
264-271 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000249964200006 |
Publication Date |
2007-09-08 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1296-2074 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:65039 |
Serial |
7693 |
Permanent link to this record |
|
|
|
Author |
Potgieter-Vermaak, S.S.; Potgieter, J.H.; Monama, P.; Van Grieken, R. |
Title |
Comparison of limestone, dolomite and fly ash as pre-treatment agents for acid mine drainage |
Type |
A1 Journal article |
Year |
2006 |
Publication |
Minerals engineering |
Abbreviated Journal |
|
Volume |
19 |
Issue |
5 |
Pages |
454-462 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000235961100009 |
Publication Date |
2005-09-17 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0892-6875 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:56983 |
Serial |
7694 |
Permanent link to this record |
|
|
|
Author |
Smits, J.; Nelissen, J.; Van Grieken, R. |
Title |
Comparison of preconcentration procedures for trace metals in natural waters |
Type |
A1 Journal article |
Year |
1979 |
Publication |
Analytica chimica acta |
Abbreviated Journal |
|
Volume |
111 |
Issue |
|
Pages |
215-226 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
The relative merits of eight procedures for preconcentrations of trace metal ions from natural water samples and synthetic solutions are evaluated. Spikes (100 μg l−1 ) of Mn, Co, Zn, Eu, Cs and Ba and the corresponding radioactive tracers were added to batches of drinking water, estuarine water, sea water, ground water, twice-distilled water and ahumic material solution. After equilibration for 25 months, the following techniques were applied: passage through columns of Dowex Al chelating resin and ofsilylated silica gel, filtration through laminate membrane filters and chelating diethylenetriamine cellulose filters, precipitation with sodium diethyldithiocarbamate and l-(2-pyridylazo)-2-naphthol, extraction with ammonium pyrrolidinedithiocarbamate, and chelation by 8-quinolinol (oxine) followed by adsorption on activated carbon. The quantitative characteristics of these techniques and the influence of the water matrix effects are discussed, as well as the applicability for x-ray fluorescence analysis. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
A1979HX09300018 |
Publication Date |
2002-07-25 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0003-2670; 1873-4324 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116369 |
Serial |
7695 |
Permanent link to this record |
|
|
|
Author |
Osán, J.; Török, S.; Alföldy, B.; Alsecz, A.; Falkenberg, G.; Baik, S.Y.; Van Grieken, R. |
Title |
Comparison of sediment pollution in the rivers of the Hungarian Upper Tisza Region using non-destructive analytical techniques |
Type |
A1 Journal article |
Year |
2007 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
Abbreviated Journal |
|
Volume |
62 |
Issue |
2 |
Pages |
123-136 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000246087100006 |
Publication Date |
2007-02-23 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0584-8547; 1873-3565 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:63420 |
Serial |
7696 |
Permanent link to this record |
|
|
|
Author |
Eliaerts, J.; Meert, N.; Dardenne, P.; Baeten, V.; Pierna, J.-A.F.; Van Durme, F.; De Wael, K.; Samyn, N. |
Title |
Comparison of spectroscopic techniques combined with chemometrics for cocaine powder analysis |
Type |
A1 Journal article |
Year |
2020 |
Publication |
Journal Of Analytical Toxicology |
Abbreviated Journal |
J Anal Toxicol |
Volume |
44 |
Issue |
8 |
Pages |
851-860 |
Keywords |
A1 Journal article; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Spectroscopic techniques combined with chemometrics are a promising tool for analysis of seized drug powders. In this study, the performance of three spectroscopic techniques [Mid-InfraRed (MIR), Raman and Near-InfraRed (NIR)] was compared. In total, 364 seized powders were analyzed and consisted of 276 cocaine powders (with concentrations ranging from 4 to 99 w%) and 88 powders without cocaine. A classification model (using Support Vector Machines [SVM] discriminant analysis) and a quantification model (using SVM regression) were constructed with each spectral dataset in order to discriminate cocaine powders from other powders and quantify cocaine in powders classified as cocaine positive. The performances of the models were compared with gas chromatography coupled with mass spectrometry (GC-MS) and gas chromatography with flame-ionization detection (GC-FID). Different evaluation criteria were used: number of false negatives (FNs), number of false positives (FPs), accuracy, root mean square error of cross-validation (RMSECV) and determination coefficients (R-2). Ten colored powders were excluded from the classification data set due to fluorescence background observed in Raman spectra. For the classification, the best accuracy (99.7%) was obtained with MIR spectra. With Raman and NIR spectra, the accuracy was 99.5% and 98.9%, respectively. For the quantification, the best results were obtained with NIR spectra. The cocaine content was determined with a RMSECV of 3.79% and a R-2 of 0.97. The performance of MIR and Raman to predict cocaine concentrations was lower than NIR, with RMSECV of 6.76% and 6.79%, respectively and both with a R-2 of 0.90. The three spectroscopic techniques can be applied for both classification and quantification of cocaine, but some differences in performance were detected. The best classification was obtained with MIR spectra. For quantification, however, the RMSECV of MIR and Raman was twice as high in comparison with NIR. Spectroscopic techniques combined with chemometrics can reduce the workload for confirmation analysis (e.g., chromatography based) and therefore save time and resources. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000606735000011 |
Publication Date |
2020-08-04 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0146-4760; 1945-2403 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
2.5 |
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
Most recent IF: 2.5; 2020 IF: 2.409 |
Call Number |
UA @ admin @ c:irua:175117 |
Serial |
7697 |
Permanent link to this record |
|
|
|
Author |
Cabal, A.; Schalm, O.; Eyskens, P.; Willems, P.; Harth, A.; van Espen, P. |
Title |
Comparison of x-ray absorption and emission techniques for the investigation of paintings |
Type |
A1 Journal article |
Year |
2015 |
Publication |
X-ray spectrometry |
Abbreviated Journal |
|
Volume |
44 |
Issue |
3 |
Pages |
141-148 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES) |
Abstract |
Four x-ray techniques: computed radiography, emission radiography, energy-resolved radiography and imaging x-ray fluorescence were compared using four mock-up panel paintings. The paintings have different stratigraphy and pigments and are representative for different historical periods. One of the paintings has a hidden underlying painting. The type of pigments used mainly influences the information obtained by both the emission and absorption measurements; high-Z white pigment and high-Z color pigments giving the best contrast. Each of the techniques revealed interesting aspects of the paintings, but none of them could reveal the hidden painting to a satisfactory level. Due to the statistical quality of the spectral data, x-ray fluorescence gives elemental images with high contrast. The radiographic images are better to reveal the internal structure. Imaging x-ray fluorescence and energy-resolved radiography measurements can be done simultaneously, and the combination has the highest potential for the study of complex multilayer paintings. Copyright (c) 2015 John Wiley & Sons, Ltd. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
000353644500010 |
Publication Date |
2015-02-05 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0049-8246 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access ![sorted by Open Access field, ascending order (up)](img/sort_asc.gif) |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:126016 |
Serial |
7698 |
Permanent link to this record |