SEPARATION OF ORGANIC AND INORGANIC SELEN IOUS COMPOUNDS BY CAPILLARYELECTROPHORESIS

Organic and inorganic selenious compounds such as sodium selenate and selenite, selenocystine and selenomethionine, were analysed by capilla ry electrophoresis. The control of the electroosmotic flow by appropri ate addition of TTAB to the background electrolyte (inversion of the e lectroosmotic flow) and the adjustment of the pH (8.5) allowed us to f astly separate the selenious compounds of interest. The analysis migra tion times and corrected surface areas were studied in term of reprodu cibility. Detection limits were in the range of the ppm for the studie d organic and non-organic selenious compounds.