摘要
采用装有ＧＤＸ－１０２的采样管，直接常温吸附大气和石油化工排放废气中的苯系物，然后以加热解析──气相色谱法测定。以苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯等七种苯系物为研究对象，确定了采样──分析的最佳操作条件。本方法具有操作简单，能准确测定污染成分等优点，平均回收率可达８１．５％，变异系数小于７．８％。在采集１Ｌ气体样品时，相应采样速度２００ｍＬ／ｍｉｎ，对七种苯系物的最低检测限可达ｐｐｂ级。
A method for the determination of benzene and its c≤c8 derivative in gaseous samples which were absorbed with GDx-102 at ambient temperature by thermal desorption-gas chromatography is introduced. The optimum sampling analytical conditions were found by using seven(C6-C8) alkyl benzenes as the studied objects. The method has the following advantages: the operation procedure is simple, the average recovery is 81.59%, the relative standard deriation is less than 7.8% and minimun of determination is ppb level.
出处
《石油化工环境保护》
1994年第1期50-51,共2页
Environment Protection in Petrochemical Industry
