恶臭污染源排气及厂界环境空气中三甲胺的测定

Determination of Trimethylamine from Stinky Pollution Source and Ambient Air at Boundary of Industrial Enterprises

文章采用气相色谱—质谱联用法测定空气中三甲胺,通过大量实验,确定分析条件,用1mL样品气体直接进样方式,其分析结果相对标准偏差小于5%,加标回收率大于90%,检出限达到0.002 5mg/m3,满足监测分析技术要求。该方法适用于恶臭污染源排气及厂界环境空气中三甲胺的测定。该方法与GB/T14676—93《空气质量三甲胺的测定气相色谱法》中方法相比,具有灵敏度高、操作简便等优势。

This paper introduces gas chromatography-mass spectrometry combination method to determine trimethylamine content in air.Analysis conditions are specified after many experiments and tests.1mL sample gas is fed directly and the analysis result is excellent with deviation less than 5%in comparing with standard specification,and the standard addition recovery rate is higher than 90%.The minimum concentration tested is as low as 0.002 5 mg/m3,which meets the monitoring and analyzing technical requirements.This method is applicable in monitoring and determining trimethylamine content from stinky pollution source and ambient air at boundary of industrial enterprises.