Speciation of chromium using wide-bore capillary electrophoresis with electrothermal atomic absorption spectrometry detection.

The development of a new method for chromium speciation using capillary electrophoresis-electrothermal atomic absorption spectrometry (CE-ETAAS) is described For that propose a simple capillary electrophoresis device enabling simultaneous separation and concentration of different chromium species has been designed and constructed The device proved suitable for separating Cr(III) and Cr(VI) in aqueous samples The sample amounts were sufficient for off-line collection and subsequent oil-line detection with ETAAS The influence of sample and background electrolyte pH values on the analytes' sepmation and recovery was investigated The separation time and sample zone length were optimized The limit of detection for both analyses was 1 ng/mL RSD of the experiments was about 10%. [ABSTRACT FROM AUTHOR]