Analytical Sciences

Abstract − Analytical Sciences, 17(3), 439 (2001).

Dapsone and Iminodibenzyl as Novel Reagents for the Spectrophotometric Determination of Trace Amounts of Nitrite in Water Samples
Padmarajaiah NAGARAJA,*  Mattighatta Shivaswamy HEMANTHA KUMAR,** and Kanchugarakoppal S. RANGAPPA*
*Department of Chemistry, University of Mysore, Manasagangothri, Mysore-570 006, India
**Department of Environmental Science, University of Mysore, Manasagangothri, Mysore-570 006, India
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 x 104 l mol-1 cm-1 and 0.000613 ug 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.