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“Role of laser-induced melting and vaporization of metals during ICP-MS and LIBS analysis, investigated with computer simulations and experiments”. Bleiner D, Chen Z, Autrique D, Bogaerts A, Journal of analytical atomic spectrometry 21, 910 (2006). http://doi.org/10.1039/b602800d
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 42
DOI: 10.1039/b602800d
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“Similarities and differences between direct current and radio-frequency glow discharges: a mathematical simulation”. Bogaerts A, Gijbels R, Journal of analytical atomic spectrometry 15, 1191 (2000). http://doi.org/10.1039/b000519n
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 25
DOI: 10.1039/b000519n
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“Surface analysis of halide distributions in complex AgX microcrystals by imaging time-of-flight SIMS (TOF-SIMS)”. Verlinden G, Gijbels R, Geuens I, de Keyzer R, Journal of analytical atomic spectrometry 14, 429 (1999). http://doi.org/10.1039/a807276k
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 10
DOI: 10.1039/a807276k
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“Temporal and spatially resolved laser-scattering plasma diagnostics for the characterization of a ms-pulsed glow discharge”. Gamez G, Bogaerts A, Hieftje GM, Journal of analytical atomic spectrometry 21, 350 (2006). http://doi.org/10.1039/b511764j
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 17
DOI: 10.1039/b511764j
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“Vibrational level population of nitrogen impurities in low-pressure argon glow discharges”. Simon P, Bogaerts A, Journal of analytical atomic spectrometry 26, 804 (2011). http://doi.org/10.1039/c0ja00179a
Abstract: The vibrational level populations of the electronic ground state of the nitrogen molecule have been calculated for typical glow discharge conditions in argonnitrogen mixtures with nitrogen concentrations between 0.1 and 1%. Stationary solutions of the master equations of the vibrational levels have been obtained using numerical methods. The main mechanisms responsible for the population and depopulation of the vibrational levels, and for the overall shape of the vibrational distribution function are pointed out. It has been found that vibrationvibration collisions play only a minor role and therefore the population of the vibrational levels is basically determined by the electron temperature.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 6
DOI: 10.1039/c0ja00179a
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“A novel gas inlet system for improved aerosol entrainment in laser ablation inductively coupled plasma mass spectrometry”. Bleiner D, Altorfer H, Journal of analytical atomic spectrometry (2005). http://doi.org/10.1039/B505248C
Abstract: In order to minimize the dead volume in large cells for laser ablation inductively coupled plasma mass spectrometry, and improve the aerosol entrainment characteristics, the gas inlet nozzle has been set in rotation. This allowed a wider volume to be swept than with the traditional static inlet nozzle approach. Therefore, sensitivity combined with site-to-site repeatability was improved by a factor of two, together with minimization of aerosol loss within the cell and signal dispersion.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 21
DOI: 10.1039/B505248C
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“Overcoming pulse mixing and signal tailing in laser ablation inductively coupled plasma mass spectrometry depth profiling”. Bleiner D, Belloni F, Doria D, Lorusso A, Nassisi V, Journal of analytical atomic spectrometry (2005). http://doi.org/10.1039/B509379C
Abstract: The laser ablation-induced plasma was used as a composition-con trolled source for ion implantation in Si crystals. Then, laser ablation in combination with inductively coupled plasma mass spectrometry was used for the elemental depth profiling of the implanted samples. Monte Carlo simulations permitted us to conclude that a depth resolution of tens of nm would be necessary to define the shape of the implantation profiles, as is obtained using XPS and RBS, whereas a hundred nm depth resolution is sufficient to determine the total implanted dose. The detection power of LA-ICP-MS would routinely allow rapid analytical control on the trace level implanted dose. Nevertheless, this technique is limited in terms of depth profiling resolution due to pulse mixing and signal tailing induced during the aerosol transport. Raw signal processing procedures were developed for the minimization of shapeline dispersion, deconvolution of pulse mixing and more appropriate assessment of the implanted profiles. Shapeline dispersion could be corrected for by determining the signal waning constant and implementing this information for a non-affine alibi transformation of the LA-ICP-MS signal traces. Pulse mixing deconvolution was attained with an algorithm that considered accumulated signal intensity due to pulse-on-pulse stacking, i.e., the latest pulse on top of all antecedent individual pulses' exponential tails proportionally.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.379
Times cited: 26
DOI: 10.1039/B509379C
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“Micro and surface analysis in archaeology”. Adams F, Adriaens A, Aerts A, de Raedt I, Janssens K, Schalm O, Journal of analytical atomic spectrometry 12, 257 (1997). http://doi.org/10.1039/A606091I
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
DOI: 10.1039/A606091I
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“Micro-heterogeneity study of trace elements in USGS, MPI-DING and glass reference materials by means of synchrotron micro-XRF”. Kempenaers L, Janssens K, Jochum KP, Vincze L, Vekemans B, Somogyi A, Drakopoulos M, Adams F, Journal of analytical atomic spectrometry 18, 350 (2003). http://doi.org/10.1039/B212196D
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
Times cited: 38
DOI: 10.1039/B212196D
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“Microscopic X-ray fluorescence analysis”. Janssens K, Vincze L, Rubio J, Bernasconi G, Adams F, Journal of analytical atomic spectrometry 9, 151 (1994). http://doi.org/10.1039/JA9940900151
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/JA9940900151
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“Microscopical X-ray fluorescence analysis and related methods with laboratory and synchrotron radiation sources”. Adams F, Janssens K, Snigirev A, Journal of analytical atomic spectrometry 13, 319 (1998). http://doi.org/10.1039/A707100K
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
DOI: 10.1039/A707100K
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“Modeling of photon scattering at high X-ray energies : experiment versus simulation”. Vincze L, Vekemans B, Janssens K, Adams F, Journal of analytical atomic spectrometry
T2 –, 15th International Congress on X-Ray Optics and Microanalysis (ICXOM), AUG 24-27, 1998, ANTWERP, BELGIUM 14, 529 (1999). http://doi.org/10.1039/A808040B
Abstract: The use of a detailed Monte Carlo simulation code for X-ray fluorescence spectrometers is demonstrated for calculating the outcome of X-ray scattering experiments in the incident energy range 40-80 keV. The code was validated by comparisons of experimental and simulated spectral distributions in the case of thick, homogeneous samples in which multiple photon scattering occurs with high probability. The experimental spectral distributions were collected at beamline BW5 of HASYLAB, Germany, where a highly energetic, monochromatic synchrotron beam is available. With respect to heterogeneous samples, the code was employed to evaluate the use of Rayleigh and Compton scatter signals for obtaining three dimensional information on the sample dark matrix composition.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
DOI: 10.1039/A808040B
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“Suitability of polycapillary optics for focusing of monochromatic synchrotron radiation as used in trace level micro-XANES measurements”. Vincze L, Wei F, Proost K, Vekemans B, Janssens K, He Y, Yan Y, Falkenberg G, Journal of analytical atomic spectrometry 17, 177 (2002). http://doi.org/10.1039/B110210A
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
Times cited: 23
DOI: 10.1039/B110210A
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“Trace analysis allows to distinguish between Venetian and facon-de-Venise glass vessels of the 16th and 17th century”. de Raedt I, Janssens K, Veeckman J, Vincze L, Vekemans B, Jeffries T, Journal of analytical atomic spectrometry 16, 1012 (2001). http://doi.org/10.1039/B102597J
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
Times cited: 49
DOI: 10.1039/B102597J
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“The use of LA-ICP-MS for the characterization of the micro-heterogeneity of heavy metals in BCR CRM 680”. Kempenaers L, Bings NH, Jeffries TE, Vekemans B, Janssens K, Journal of analytical atomic spectrometry 16, 1006 (2001). http://doi.org/10.1039/B102512K
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
Times cited: 23
DOI: 10.1039/B102512K
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“The use of lead-glass capillaries for microfocusing of highly energetic (0-60 KeV) synchrotron radiation”. Janssens K, Vincze L, Vekemans B, Adams F, Haller M, Knöchel A, Journal of analytical atomic spectrometry 13, 339 (1998). http://doi.org/10.1039/A707700I
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
DOI: 10.1039/A707700I
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“Development of a multi-method analytical approach based on the combination of synchrotron radiation X-ray micro-analytical techniques and vibrational micro-spectroscopy methods to unveil the causes and mechanism of darkening of “fake-gilded&rdquo, decorations in a Cimabue painting”. Monico L, Prati S, Sciutto G, Catelli E, Romani A, Balbas DQ, Li Z, De Meyer S, Nuyts G, Janssens K, Cotte M, Garrevoet J, Falkenberg G, Tardillo Suarez VI, Tucoulou R, Mazzeo R, Journal of analytical atomic spectrometry 37, 114 (2022). http://doi.org/10.1039/D1JA00271F
Abstract: Redox processes activated by environmental factors have been identified as the main cause of the chromatic alterations of a number of artists' pigments, including the yellow pigment orpiment (As2S3). Although a general comprehension of the mechanisms has been provided through characterization of degradation compounds of As2S3, experimental evidences to prove how other paint components and how different environmental agents influence the formation pathways of specific secondary compounds are still lacking. Thus, it becomes fundamental to develop a methodological strategy which enable achieving a discrimination among the causes affecting the chemical stability of more heterogenous As2S3-based paints and defining the mechanism through which the alteration establishes and evolves, with the ultimate goal of optimizing the preventive conservation measures of unique masterpieces. In this paper, we propose a comprehensive multi-material and multi-method approach based on the combination of synchrotron radiation X-ray micro-analytical techniques (i.e., X-ray diffraction, X-ray fluorescence and X-ray absorption near edge structure spectroscopy at S K-/Ag L-3-/As K-edges) and vibrational micro-spectroscopy methods to unveil the causes and mechanism of darkening of “fake-gilded” decorations in tempera paintings, originally consisting of an unusual mixture of As2S3 and metallic silver (Ag-0). Such degradation process is a not yet understood phenomenon threatening a series of Old Master paintings, including those by the Italian painters Cimabue and Pietro Lorenzetti. The high specificity, sensitivity and lateral resolution of the employed analytical methods allowed providing first-time evidence for the presence of black acanthite (alpha-Ag2S), mimetite [Pb-5(AsO4)(3)Cl] and syngenite [K2Ca(SO4)(2)center dot H2O] as degradation products of the “fake-gilded” decorations in the Maesta by Cimabue (Church of Santa Maria dei Servi, Bologna, Italy). Furthermore, the study of the painting combined with that of tempera paint mock-ups permitted to explore and define the environmental agents and internal factors causing the darkening, by proving that: (i) Ag-0 and moisture are key-factors for triggering the transformation of As2S3 to alpha-Ag2S and As-oxides; (ii) S2--ions arising from the degradation of As2S3 are the main responsible for the formation of alpha-Ag2S; (iii) light exposure strengthens the tendency of the paint components towards alteration. Based on our findings, we finally propose a degradation mechanism of As2S3/Ag-0-based tempera paints.
Keywords: A1 Journal article; Antwerp X-ray Imaging and Spectroscopy (AXIS)
Impact Factor: 3.4
DOI: 10.1039/D1JA00271F
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“Analysis of speleothems by electron and X-ray microprobes”. Kuczumow A, Vekemans B, Schalm O, Gysels K, Ro C-U, Van Grieken R, Journal of analytical atomic spectrometry 16, 90 (2001). http://doi.org/10.1039/B007725I
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/B007725I
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“Application of high-energy polarised beam energy dispersive X-ray fluorescence spectrometry to cadmium determination in saline solutions”. van Meel K, Fontàs C, Van Grieken R, Queralt I, Hidalgo M, Marguí, E, Journal of analytical atomic spectrometry 23, 1034 (2008). http://doi.org/10.1039/B718382H
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/B718382H
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“Characteristics of atomic absorption calibration curves with the transversely heated graphite furnace”. Bencs L, Szakács O, Szoboszlai N, Ajtony Z, Bozsai G, Journal of analytical atomic spectrometry 18, 105 (2003). http://doi.org/10.1039/B208198A
Abstract: Calibration curves with two quasi-linear sections ("double sloping'') were observed for the medium volatile elements, Cr and Cu, with the use of a SIMAA 6000 graphite furnace atomic absorption spectrometer under interrupted internal gas flow conditions. If a standard transversally heated graphite atomizer (THGA) tube was shortened by 0.5 mm at both of its ends, (i.e. the gaps were enlarged between graphite furnace housing and tube ends), a stronger declination of the calibration curves resulted. Elements with fairly high diffusion coefficients (>5.8 cm(2) s(-1)) and with short appearance time of their transients (<0.6 s), such as Cr and Cu, have shown the most characteristic sensitivity drop towards higher concentrations. This anomalous feature could be eliminated in three different ways; (1) by applying end-capped THGA tubes, (2) using mini-flow (50 cm(3) min(-1)) conditions during the atomization stage, and (3) by adding Pd-Mg chemical modifier. For the low volatile Mo and V, the calibration curves had no irregular shape. For Ag, Co, Cr, Cu, Mn and Ni, the mini-flow settings improved the linearity of the calibration curves and extended the upper limit of the linear calibration range by a factor of 1.5-2.0. The irregular characteristic of the analytical curves was interpreted as an increased vapour loss at higher analyte concentrations through the opened ends of the standard THGA tubes. This vapour loss was associated with the significantly diverse expulsion velocities of atoms, caused by the difference in temperature and concentration gradients, when evaporating amounts of analytes with more than one order of magnitude difference.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/B208198A
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“Combined 1D, 2D and 3D micro-XRF techniques for the analysis of illuminated manuscripts”. Lachmann T, van der Snickt G, Haschke M, Mantouvalou I, Journal of analytical atomic spectrometry 31, 1989 (2016). http://doi.org/10.1039/C6JA00220J
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.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/C6JA00220J
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“Comparison between direct current and radiofrequency glow discharge mass spectrometry for the analysis of oxide-based samples”. de Gendt S, Van Grieken R, Hang W, Harrison WW, Journal of analytical atomic spectrometry 10, 689 (1995). http://doi.org/10.1039/JA9951000689
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/JA9951000689
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“Critical assessment and proposal for reconstruction of a grazing emission X-ray fluorescence instrument”. Kuczumow A, Schmeling M, Van Grieken R, Journal of analytical atomic spectrometry 15, 535 (2000). http://doi.org/10.1039/A908661G
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/A908661G
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“Elemental x-ray images obtained by grazing-exit electron probe microanalysis (GE-EPMA)”. Tsuji K, Nullens R, Wagatsuma K, Van Grieken RE, Journal of analytical atomic spectrometry 14, 1711 (1999). http://doi.org/10.1039/A905301H
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/A905301H
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“Improved radiographic methods for the investigation of paintings using laboratory and synchrotron X-ray sources”. Schalm O, Cabal A, van Espen P, Laquière N, Storme P, Journal of analytical atomic spectrometry 26, 1068 (2011). http://doi.org/10.1039/C0JA00242A
Abstract: It is generally known that radiographic inspection of 1517th century paintings can easily be done with a polychromatic X-ray source using a voltage between 20 kV and 40 kV in combination with classic X-ray films. Unfortunately, the spatial structure of numerous 19th and early 20th century paintings cannot be visualized with conventional radiography due to several reasons such as the use of lead white grounds or low absorbing pigments. Radiographic images are blurred or worse, they do not contain the picture of the painting. During the last decades, many technological innovations have been introduced in the field of radiography but their possibilities in cultural heritage have not been explored in full detail. In our investigation we used phosphor imaging plates, energy dispersive detectors and CCD-cameras in combination with synchrotron radiation and conventional X-ray tubes in order to improve the quality of radiographic images. Several promising techniques that could improve the quality of radiographs of paintings were identified.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/C0JA00242A
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“Inorganic nitrogen speciation in single micrometer-size particles by laser microprobe mass analysis”. Bruynseels F, Otten P, Van Grieken R, Journal of analytical atomic spectrometry 3, 237 (1988). http://doi.org/10.1039/JA9880300237
Abstract: Individual micrometer-size particles of inorganic nitrogen salts, such as NaNO3, NaNO2, (NH4)2SO4, NH4Cl, NH4NO3 and their mixtures, were analysed in the laser microprobe mass analyser. The cluster-ion distributions of the salts are systematically described and can be used to gain speciation information. The results can be used to study the distribution of the atmospheric aerosol inorganic nitrogen compounds and to investigate their chemical transformations under ambient conditions.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/JA9880300237
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“Optimization of secondary cathode thickness for direct current glow discharge mass spectrometric analysis of glass”. Schelles W, de Gendt S, Van Grieken RE, Journal of analytical atomic spectrometry 11, 937 (1996). http://doi.org/10.1039/JA9961100937
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/JA9961100937
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“Processing of three-dimensional microscopic X-ray fluorescence data”. Vekemans B, Vincze L, Brenker FE, Adams F, Journal of analytical atomic spectrometry 19, 1302 (2004). http://doi.org/10.1039/B404300F
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/B404300F
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“Quantification of boron in cells for evaluation of drug agents used in boron neutron capture therapy”. Verlinden B, Van Hoecke K, Aerts A, Daems N, Dobney A, Janssens K, Cardinaels T, Journal Of Analytical Atomic Spectrometry 36, 598 (2021). http://doi.org/10.1039/D0JA00456A
Abstract: Boron neutron capture therapy (BNCT) is an extensively studied radiotherapeutic strategy for cancer treatment. BNCT is based on irradiation of malignant tumour cells with neutrons after uptake of a B-10 containing molecule. Alpha particles, locally produced by neutron irradiation kill the cancer cells. Important for ongoing research regarding cellular uptake and cytotoxicity of a large variety of B-10 containing molecules is the accurate determination of boron concentrations in cell cultures. In this work, the sample preparation for quantitative inductively coupled plasma mass spectrometry (ICP-MS) analysis on cell cultures was optimized. By making use of acid digestion combined with UV digestion, low detection limits (0.4 mu g L-1) and full recoveries of boron could be achieved while measurements were free of spectral and non-spectral interferences. Finally, cell-associated boron in the form of 4-borono-l-phenylalanine (l-BPA) in vascular endothelial cell cultures could be determined with ICP-MS as (1.26 +/- 0.10) x 10(9) boron atoms per cell. The developed method can prove its importance for further BNCT research and elemental analysis of cell cultures.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 3.379
DOI: 10.1039/D0JA00456A
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“Quantification problems in light element determination by grazing emission X-ray fluorescence”. Kuczumow A, Claes M, Schmeling M, Van Grieken R, de Gendt S, Journal of analytical atomic spectrometry 15, 415 (2000). http://doi.org/10.1039/A908724I
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1039/A908724I
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