Determination of Trace Nitrites in Foodstuffs by Kinetic Spectrophotometry

Abstract

Abstract: A new kinetic spectrophotometric method for the determination of trace nitrites has been developed. The method was based on the catalytic effect of trace nitrites on crystal violet oxidation of potassium periodate in dilute phosphoric acid solution. The detection limit was 0.06μg/L with linear range of 0～4.0μg/L. The method has been applied to the determination of trace nitrites in water samples. The results was in agreement with those provided by Griess method with precision of ≤5.0% RSD (n=6).

Key words: nitrites, kinetic spectrophotometry, crystal violet, potassium periodate, foodstuffs

ZHOU Zhi-Rong, WANG Wen-Min, WANG Li. Determination of Trace Nitrites in Foodstuffs by Kinetic Spectrophotometry[J]. FOOD SCIENCE, 2005, 26(10): 181-183.

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Determination of Trace Nitrites in Foodstuffs by Kinetic Spectrophotometry

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