Authors: Ali A Ensafi, G Bagherian Dehaghei

Publication date: 1999/1/1

Journal name: Fresenius' journal of analytical chemistry

Volume: 363

Pages: 131-133

Publisher: Springer-Verlag

Abstract A flow injection system with spectrophotometric detection is proposed for the
determination of low levels of nitrite based on its catalytic effect on the oxidation of
gallocyanine by bromate in acidic media. Various analytical parameters such as acidity,
reagent concentration, flow rate, sample size, time, temperature, and interfering species
were studied. The calibration graph was linear for 0.020–0.500 μg/mL of nitrite. The method
is successfully applied to food samples. Up to 30±5 samples can be analyzed per hour.