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\bibitem{Liu_etal2020} {\textquotedblleft}\textit{Thin-layer potentiometry for creatinine detection in undiluted human urine using ion-exchange membranes as barriers for charged interferences}{\textquotedblright}. Liu Y, C{\'a}novas R, Crespo GA, Cuartero M, Analytical Chemistry \textbf{92}, 3315 (2020).   http://doi.org/10.1021/ACS.ANALCHEM.9B05231

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