Gas-chromatographic determination of selenium as an organo-selenium compound with acetophenone.

A gas-chromatographic method with electron-capture detection is presented for the determination of selenium after reaction with acetophenone to obtain an organo-selenium compound. This compound is extracted into benzene and chromatographed on an alumina column. The relative standard deviation for the average value (5 mug) is +/-6% (n = 8, P = 95%). The method has been applied to the determination of selenium in metals, alloys, ores and biological samples.