Authors: Ali A Ensafi

Publication date: 1997/1

Journal name: INDIAN JOURNAL OF CHEMISTRY SECTION A

Volume: 36

Pages: 105-107

A flow injection spectrophotometric method has been described for determination of
selenium (IV). The method is based on the catalytic effect of Se (IV) on the reduction of
gallocyanine by sulphide. The decrease in absorbance of gallocyanine at 620 nn is
proportional to the Se (IV) concentration in the range 2.5-500 ng/ml with a limit of detection
of 1.0 ng/ml. The relative standard deviation for ten replicate measurements of 50 ng/ml of
Se (IV) is 1.5%. Interference due to various ions has been studied.