2003•Journal of Henan Normal UniversityRequires access

Discoloring Spectrophotometric Determination of Nitrite with Azure I

Qingling Liu

Abstract

A new spectrophotometric method for determination of trace nitrite was developed. The method is based on the discoloring reaction of azure I with nitrite in sulfuric acid medium. The linear range of the determination is 0 ～0.80 μg/mL with detection limit of 0.03 μg/mL. The method has been used to determine trace nitrite in potassium nitrate and saliva samples.

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Key concepts: Nitrite, Chemistry, Detection limit, Linear range, Nitrate, Sulfuric acid, Chromatography, TRACE (psycholinguistics)