University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 8 2 1997 06 01 KINETIC-SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NITRITE BY THE REACTION OF METHYL ORANGE FORMATION - 31421 EN Journal Article The composite diazotization coupling reaction of sulfanilic acid and N, Ndimethylaniline was used for the precise, accurate, and rapid determination of trace amounts of nitrite ion (0.02-3 µg/ml). The reaction was monitored spectrophotometrically by measuring the absorbance of the produced methyl orange at 510 nm by a fixed the method of 5.0 minutes. The relative standard deviation for the determination of 0.50 µg/ml of nitrite was 1.8% (n=l 1). The method was used for the determination of nitrite in sausage and water samples https://jsciences.ut.ac.ir/article_31421_4af64531eeb6099df6c2643b89b2a1bc.pdf