Authors: M Naghizadeh, AA Ensafi

Publication date: 1995/9/23

Journal name: Journal of Sciences, Islamic Republic of Iran

Volume: 6

Abstract A kinetic method developed for the determination of ultra-trace amounts of nitrite
based on its catalytic effect on the reaction between potassium bromate and Nile blue A in
strongly acidic media is reported. The reaction was monitored spectrophotometrically by
measuring the decrease in absorbance of Nile blue A at 645 nm by the fixed-time method.
The decrease in absorbance during the first 0.5-3.0 min of the reaction is related to the
concentration of nitrite in the range of 0.002-0.500 tLg. ml". The detection limit of 0.001 ttg. ...