Studies on Pollutants : Spectrophotometric Determination of Nitrite as "Azoxine Dye

Department of Chemistry, Ravishankar University, Raipur-492 010, M P., India Manuscript received 22 April 1980, accepted 7 August 1980 Ten new reagent systems for determination of nitrite in water have been studied. A new system for the determination of nitrite using diazotised aromatic amine with 8- hydroxyquinoline as a coupling reagent has been developed. Sulphanilamide was found to be most suited out of the ten amines tried for the determination of nitrite. The λmax of the dye is 500 mu. The Beer's law is followed in the range of 4-30 µg of nitrite per 25 ml. The molar absorptivity and Sandell's sensitivity are 30 x 103 litre mule-1 cm-1 and 0.0015 µg cm-2 respectively. The optimum reaction conditions and other analytical parameters such as, Beer's law, sensitivity and interferences due to foreign species have been studied