热脱附/气相色谱-质谱法测定环境空气中的挥发性有机物  

Determination of VOCs in ambient air by thermal desorption-GC/MS.

作　　者：曲晶明 叶能胜[1] 亓学奎[2] 王欣欣[2] Qu Jingming;Ye Nengsheng;Qi Xuekui;Wang Xinxin(Capital Normal University,Beijing 100048,China;Beijing Center for Physical and Chemical Analysis,Beijing 100089,China)

机构地区：[1]首都师范大学,北京100048 [2]北京市理化分析测试中心,北京100089

出　　处：《分析仪器》2021年第4期58-65,共8页Analytical Instrumentation

基　　金：北京市2021年改革与发展专项课题(2021ZL0303)。

摘　　要：建立了能同时测定环境空气中34种挥发性有机物(VOCs)的热脱附-气相色谱质谱联用技术分析方法。该方法在25-200ng范围内呈现良好的线性关系(r>0.999),加标量为25、100和200 ng的回收率在81.72%-117.57%之间,相对标准偏差为1.76%-7.33%。当采样体积为30 L时,34种VOCs的方法检出限为0.02-0.10μg/m^(3)。该方法灵敏度高、重现性好、准确度高且操作便捷,针对不同环境空气质量的实际样品应用效果较好,满足环境空气中34种VOCs的同时检测分析。The method showed a good linear relationship in the range of 25—200 ng(r>0.999).The recoveries of 25ng,100ng and 200 ng were in the range of 81.72%—117.57%,and the relative standard deviations ranged from 1.76%to 7.33%.When the sampling volume was 30 liters,the detection limits of 34 kinds of VOCs were from 0.02μg/m^(3) to 0.10μg/m^(3).In the sample test of different ambient air quality,the application effect is good,which can meet the requirments of the simultaneous detection of 34 kinds of VOCs in ambient air.The method has the advantages of high sensitivity,good reproducibility,high accuracy and convenient operation.

关 键 词：挥发性有机物 热脱附 气相色谱-质谱 环境空气 

分 类 号：X831[环境科学与工程—环境工程] O657.63[理学—分析化学]