FLOW-Injection Determination of Traces of Sulfide by the Brilliant Green-Sulfide Reaction with Spectrophotometry Detection

Authors: Ali A Ensafi

Publication date: 1992/8/1

Journal name: Analytical letters

Volume: 25

Pages: 1525-1543

Publisher: Taylor & Francis Group

Abstract A flow injection system is proposed for the rapid and sensitive determination of
trace amounts of sulfide based on the addition reaction of sulfide with Brilliant Green at pH 7
and 25 C°. The effect of important parameters, such as reagent concentration, pH, reagent
flow rate, sample volume, temperature and length of the reaction coil are reported. Sulfide in
the range of 40-2000 ng· ml− 1 can be determined at a rate of 40±5 samples per hour. The
limit of detection was obtained as 2.0 ng of sulfide. The relative standard deviation for the ...