气相色谱法测定环境空气中的微量异戊烯和异戊二烯

建立了环境空气中异戊烯、异戊二烯的活性炭吸附,二硫化碳解吸气相色谱法。用DB-1毛细管柱分离,FID进行检测。该方法异戊烯的回收率为87.6%~105.2%,RSD为2.1%~8.2%,异戊二烯的回收率为86.1%~105.1%,RSD为4.2%~8.5%。当采样体积为2 L时,异戊烯最低检测限为0.04 mg/m3,异戊二烯最低检测限为0.06 mg/m3。

Micro Determination of Pentene and Isoprene in Ambient Air by Gas Chromatography

Isopentenyl and isoprene in ambient air was collected by activated carbon tube and then desorbed with Carbon disulfide. DB-1 column was used for separation,and determined by FID. Isopentenyl＆#39;s recoveries were 87.6%-105.2%, and RSDs were 2.1%-8.2%, Isoprene＆#39;s recoveries were 86.1%-105.1%, and RSDs were 4.2%-8.5%. The isopentenyl＆#39;s minimum detectable concentration was 0.04 mg/m3 and isoprene＆#39;s was 0.06 mg/m3 when 2 L ambient air was collected.