在一家乳制品厂发生硝酸职业事故后对乳清粉和奶粉中硝酸盐含量的测定。

Determination of nitrate content in whey and milk powders at a dairy after an occupational accident with nitric acid.

作者信息

Nygren O

出版信息

Scand J Work Environ Health. 1982 Sep;8(3):227-30. doi: 10.5271/sjweh.2473.

Abstract

A case of accidental occupational intoxication by fumes of nitrogen oxides and the application of an indirect method for the analysis of nitrate, nitrite, and nitro groups to establish the origin of the intoxication are presented. The method is based on the formation of a copper neocuproine complex, and extraction of the complex with methyl isobutyl ketone. The amount of copper in the organic phase is directly proportional to the nitrate content. This copper complex is determined by atomic absorption spectrophotometry. The results, which showed that samples from the contaminated workroom contained 0.1-0.2% nitrate, while blanks contained less than 0.02%, strongly support the hypothesis proposed for the course of the accident.

摘要

本文介绍了一例因氮氧化物烟雾导致的意外职业中毒病例，以及应用间接方法分析硝酸盐、亚硝酸盐和硝基以确定中毒来源的情况。该方法基于铜新铜试剂络合物的形成，并用甲基异丁基酮萃取该络合物。有机相中铜的含量与硝酸盐含量成正比。通过原子吸收分光光度法测定该铜络合物。结果表明，受污染工作室的样品中硝酸盐含量为0.1 - 0.2%，而空白样品中含量低于0.02%，这有力地支持了针对事故过程所提出的假设。