固定污染源废气中17种挥发性有机污染物气相色谱-质谱分析方法研究

Determination of 17volatile organic compounds in stationary source emission by gas chromatography-mass spectrometry

建立了固定污染源废气中苯、3-戊酮、六甲基二硅氧烷、正庚烷、甲苯、环戊酮、乙酸乙酯等17种挥发性有机污染物的气相色谱-质谱分析方法。采用吸附-热脱附方式,对废气中的17种有机污染物进行了测定,对吸附-热脱附条件进行了优化。在优化的条件下,对17种挥发性有机污染物测定的方法进行了评价,7次测定结果重复性的相对标准偏差不大于4.5%,加标回收率在94.4%~108.6%之间,可满足日常废气中17种挥发性有机污染物的测定。

The sample was adsorbed by adsorption tube and thermal desorption, and then determined by gas chromatography-mass detector. The recoveries were 94.4%-108.6% ,the relative standard deviation （n=7） of the determination results were 0.7%- 4.5%. The method can be used in routine analysis.