Dapsone and Iminodibenzyl as Novel Reagents for the Spectrophotometric Determination of Trace Amounts of Nitrite in Water Samples

Abstract

A rapid, simple, sensitive and selective spectrophotometric determination of nitrite using new diazotizing and coupling reagents is described. The method is based on a diazotization-coupling reaction between dapsone and iminodibenzyl in a hydrochloric acid medium. The molar absorptivity and Sandell’s sensitivity were found to be 7.5 × 10⁴ l mol^-1 cm^-1 and 0.000613 µg ml^-1, respectively. The interference effects of various cations and anions were also studied and reported. This method has been found to be applicable for the determination of nitrite in various water samples.