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. (1374). SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION. , 6(4), -.
. "SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION". , 6, 4, 1374, -.
. (1374). 'SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION', , 6(4), pp. -.
. SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION. , 1374; 6(4): -.

SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION

Journal of Sciences, Islamic Republic of Iran
مقاله 4، دوره 6، شماره 4، اسفند 1995    اصل مقاله (320.11 K)
چکیده
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
µg.ml . The detection limit of 0.001 µg.ml was achieved for the nitrite ion. The
relative standard deviation for 0.0100 µg.ml nitrite is 1.0%. Most common anions
and cations did not interfere in the measurement. The procedure was successfully
applied for the determination of nitrite in natural water and salt
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