苏玛罐采样-GC-FID/MS同时测定环境空气中多种VOCs

Simultaneous Determination of VOCs in Air by SUMMA Canister Sampling-GC-FID/MS

采用苏玛罐采样-大气预浓缩仪结合气相冷柱箱与Deans Switch中心切割技术,将C 2~C 3组分切割至HP-PLOT/Q+PT柱,用FID检测器分析,其余组分通过DB-1柱子分离后进入质谱分析,实现1次进样同时测定环境空气中57种PAMS和65种TO-15。结果表明:108种VOCs在0.15 nmol/mol~8.0 nmol/mol范围内线性良好,检出限为0.04μg/m^3~2.8μg/m^3,相对响应因子的RSD<30%。

With SUMMA canister sampling-air preconcentrator,gas phase cold oven and Deans Switch cutting technique,C 2 and C 3 components were trapped into HP-PLOT/Q+PT column and determined by FID detector.Other components were separated by DB-1 column and determined by mass detector(MS).It was realized for simultaneous determining 57 kind of PAMS compounds and 65 kind of TO-15 compounds in ambient air with just one injection.The results showed that 108 kinds of VOCs had good linearity in the range of 0.15 nmol/mol to 8.0 nmol/mol,the detection limits were from 0.04μg/m^3 to 2.8μg/m^3,the RSD of relative response factor was not more than 30%.