Spectrophotometric determination of trace amounts of tellurium based on its catalytic effect in the reduction of gallocyanine with sodium sulphide

Authors: Ali A Ensafi, M SABER TEHRANY, M Keyvanfard

Publication date: 2002

Journal name: Indian journal of chemistry. Sect. A: Inorganic, physical, theoretical & analytical

Volume: 41

Pages: 1871-1873

Publisher: India National Science Academy

Résumé/Abstract A simple and sensitive kinetic spectrophotometric method for the
determination of ultra trace amounts of tellurium (IV) has been proposed. It is based on the
catalytic effect of Te (IV) on the reduction of gallocyanine by sodium sulphide. The reaction is
monitored spectrophotometrically by measuring the decrease in absorbance of the reaction
mixture at 618 nm. The method allows the determination of tellurium concentration in the
range 2.0-200 ng/ml, with the detection limit of 1 ng/ml. The relative standard deviation for ...