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- W2038491196 abstract "This contribution presents an experimental approach for improvement of analytical performance of electromembrane extraction (EME), which is based on the use of stabilized constant d.c. electric current. Extractions were performed using a high voltage power supply, which provided stabilized constant d.c. current down to 1 μA and facilitated current-controlled transfer of ions of interest from a donor solution through a supported liquid membrane (SLM) into an acceptor solution. Repeatability of the extraction process has significantly improved for EME at constant electric current compared to EME at constant voltage. The improved repeatability of the extraction process was demonstrated on EME-capillary electrophoresis (EME-CE) analyses of selected basic drugs and amino acids in standard solutions and in human urine and serum samples. RSD values of peak areas of the analytes for EME-CE analyses were about two-fold better for EME at constant electric current (2.8–8.9%) compared to EME at constant voltage (3.6–17.8%). Other analytical parameters of the EME-CE methods, such as limits of detection, linear ranges and correlation coefficients were not statistically different for the two EME modes. Moreover, EME at constant electric current did not suffer from SLM instabilities frequently observed for EME at constant voltage." @default.
- W2038491196 created "2016-06-24" @default.
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- W2038491196 date "2012-04-01" @default.
- W2038491196 modified "2023-10-18" @default.
- W2038491196 title "Electromembrane extraction using stabilized constant d.c. electric current—A simple tool for improvement of extraction performance" @default.
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- W2038491196 doi "https://doi.org/10.1016/j.chroma.2011.11.035" @default.
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