Ultra-trace analysis of nitrite in food samples by flow injection with spectrophotometric detection

被引：14

作者：

Ensafi, AA ^{[1
]}

Dehaghei, GB ^{[1
]}

机构：

[1] Isfahan Univ Technol, Coll Chem, Esfahan, Iran

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 363卷 / 01期

关键词：

D O I：

10.1007/s002160051158

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 mu g/mL of nitrite. The method is successfully applied to food samples. Up to 30 +/- 5 samples can be analyzed per hour.

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页码：131 / 133

页数：3

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