摘要
利用苏玛罐采样,用配有双毛细管柱的气相色谱—质谱仪对环境空气VOCs进行测定。优化条件下,在1.0~15.0 nmol/mol浓度范围内线性关系良好;检出限为0.1~0.9μg/m^(3);空白加标样相对标准偏差(RSD)范围为1.0%~6.9%;加标回收率为81.0%~100.8%。用建立的方法分析了2021年5月盐城市4个点位环境空气VOCs,结果表明,2021年5月盐城市平均VOCs浓度为1.76 nmol/mol;主要检出的VOCs有乙烷、丙烷、乙炔、乙烯、正丁烷、异丁烷、异戊烷、苯和甲苯等。
Ambient air VOCs were measured using Gas Chromatograph-Mass Spectrometer equipped with dual capillary columns by sampling with summa canister.Under the optimized conditions,the linear relationship was good in the concentration range of 1.0-15.0 nmol/mol,and the detection limit was 0.1-0.9μg/m^(3).The relative standard deviation(RSD)range of the blank spiked samples was 1.0%-6.9%,and the spike recovery was 81.0%-100.8%.The established method was used to analyze VOCs in ambient air at 4 points in Yancheng City in May 2021.The results showed that the average VOCs concentration in Yancheng City in May was 1.76 nmol/mol,and the main detected VOCs were ethane,propane,acetylene,ethylene,n-butane,isobutane,isopentane,benzene and toluene,etc.
出处
《环境保护与循环经济》
2022年第12期82-86,共5页
environmental protection and circular economy
