A sensitive kinetic spectrophotometric method for the determination of nitrite has been proposed, based on its catalytic effect on the oxidation of bromopyrogallol red (BPR) with bromate in sulphuric acid (0.15M). The decrease in absorbance at 467 nm is monitored spectrophotometrically after 5 min, with 20-1000 ng/ml nitrite. The presence of nitrate do not interfere me determination of nitrite. Coefficient of variation (C.V) for (n=10) was observed 0.866. The nitrite has been determined in water samples and results are compared with standard spectrophotometric method.
A A KHASKHELI ,G M MASTOL ,I A ANSARI ,M Y KHUHAWAR ,
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