吹扫捕集-气相色谱-质谱法测定加油站地下水中特征污染物  

Determination of Characteristic Pollutants in the Groundwater of Gas Stations by Purge and Trap-GC/MS

作　　者：肖寒[1] 魏新明[1] 高翔[1] 

机构地区：[1]中国石油化工股份有限公司青岛安全工程研究院,青岛266071

出　　处：《理化检验（化学分册）》2015年第6期824-827,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用吹扫捕集-气相色谱-质谱法同时测定加油站地下水中特征污染物甲基叔丁基醚、苯、甲苯、乙苯、二甲苯和萘含量。水样经吹扫捕集浓缩仪处理后，采用HP-5MS型毛细管色谱柱分离，质谱中选择电喷雾离子源-全扫描模式，以氟苯和1，2二氯苯-D1为内标进行定量。7种化合物的质量浓度在一定范围内与其峰面积呈线性关系，检出限（3S／N）为0．1～0．4μg·L-1。加标回收率在91．0％～105％之间，测定值的相对标准偏差（n=6）在1．1％～3．9％之间。The content of characteristic pollutants,including methyl tertiary butyl ether,benzene,toluene,ethyl benzene, p-xylene, m-xylene, o-xylene, and naphthalene, in the groundwater of gas stations were determined by Purge and Trap-GC / MS. The water sample was treated by a purge-trap concentrator and then separated on a HP-5 MS capillary column. EI and full scan were adopted in MS. Fluorobenzene and 1,2-dichlorobenzene-D4 were used as internal standards for quantification. The linear relationship between the peak area and the mass concentration of the seven compounds was in a certain range,with detection limits in the range of0. 1- 0. 4 μg · L- 1. The recovery rates measured by standard addition method were in the range of 9 1. 0 %-1 0 5 %,with RSD in the range of 1. 1 %- 3. 9 %

关 键 词：吹扫捕集-气相色谱-质谱法 加油站地下水 特征污染物 

分 类 号：O657.63[理学—分析化学]