Simultaneous analysis of lead, mercury and selenium species by capillary electrophoresis with combined ethylenediaminetetraacetic acid complexation and field-amplified stacking injection.
作者： Wuping Liu , Hian Kee Lee
DOI: 10.1002/(SICI)1522-2683(19990801)20:12<2475::AID-ELPS2475>3.0.CO;2-M
关键词:
摘要: In this study, speciation analysis was carried out for multispecies of lead, mercury and selenium by capillary electrophoresis (CE) with combined complexation field-amplified stacking injection (FASI). Ethylenediaminetetraacetic acid (EDTA) added to the sample mixture form UV-absorbing complexes analytes, thus enabling direct UV detection. It also used in running electrolyte improve resolution. Under optimal conditions, ten analytes were baseline-separated within 20 min. The influence operational conditions (pH, EDTA concentration, sodium dodecyl sulfate concentration) on electrophoretic behavior species studied. analyte-related parameters calculated based migration equation. Enhancement detection, up 1700-fold, achieved charged FASI, sub-ng/mL detection limits obtained. performance method compared high-performance liquid chromatography, gas chromatography other CE procedures.
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