罐采样与GC-MS联用测定空气中三甲胺

摘要

采用真空罐采样，三级冷阱预浓缩仪处理样品，气相色谱-质谱法测定空气中的三甲胺.结果表明，检出限为0.005 mg/m3，相对标准偏差为4.1%，加标回收率为92.0%~108%，能达到国家标准要求.该方法操作简单，测定准确可靠，可用于环境空气中三甲胺的测定.%With Sampling by vacuum canister and processing samples by three stage cold trap,we determined trimethylamine in the air samples by gas chromatography⁃mass spectrometry. The results show that the detection limit was 0.005 mg/m3,the relative standard deviation is 4.1%,and the recovery rate was 92.0%~108%,which can meet the requirements of Emission Standards for Odor Pollutants. This method is simple,accurate and reliable,which can be used for determination of trimethylamine in ambient air.