Authors: Ali A Ensafi

Publication date: 1996/5/1

Journal name: Analytical letters

Volume: 29

Pages: 1177-1191

Publisher: Taylor & Francis Group

Abstract A flow injection system is proposed for the rapid and sensitive determination of ultra
trace amounts of osmium as osmium tetroxide. The method is based on the catalytic effect of
osmium on the oxidation of gallocyanine by hydrogen peroxide at 30° C. The effect of
important parameters, such as pH, reagent concentration, and flow rate, sample volume,
temperature and length of the reaction coil are reported. Osmium in the range of 0.010-100
ng. ml− 1 can be determined at a rate of 35±5 samples per hour. The limit of detection was ...