顶空-气相色谱法测定废水中残留苯系物的含量

Determination of benzene substances in waste water by headspace-gas chromatography

采用顶空-气相色谱法可对废水中残留的苯系物(苯、甲苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯、苯乙烯,共8种苯系物)进行分析。该方法采用顶空进样器作为样品预处理手段,INNOWAX色谱柱进行分离,氢火焰离子化检测器检测,8种苯系物可以被完全分离,测定相对标准偏差在3.5%以下,样品回收率均高于85%。此种方法测定苯系物残留量,简便、测定重复性好,完全能满足废水中残留苯系物的分析。

The benzene series residues in water （benzene , toluene , o‐xylene , m‐xylene ,p‐xylene , cumene ,styrene ,a total of 8 kinds of benzene）can be analysed by headspace gas chromatography .The method uses headspace sampler as a sample pretreatment methods ,using INNOWAX column and hydro‐gen flame ionization detector ,8 kinds of benzene can be completely separated ,the determination of relative standard deviation are below 3.5% ,and the sample recovery rate is higher than 85% .This method is ac‐curate ,reproducible ,and can meet the analysis of benzene residues in wastewater .