摘要
应用大流量玻璃纤维滤膜采样法采集济南市环境空气的总悬浮颗粒物，用索氏提取器提取其中的PCBs，浓缩后进行色谱-质潜定性定量分析来测定大气颗粒物中多氯联苯含量，从而建立了一套有效的测定济南市环境空气颗粒物中PCBs的分析方法。实验结果表明：索氏提取24h、回流速度3～4次／h、200ml,的二氯甲烷与正己烷1：1的回流液，索氏提取效果较好，在此条件下，利用GC／MS的计算机系统结合人工检索作定性定量分析，能较好的从颗粒物中分离出二氯到八氯PCBs．并且确定其含量。从数据中可以看出，采集点的空气申PCBs为0．454ng／m^3，总量的分布以六代氯、七代氯、八代氰为主，且总量舍繁较多，从而确定济南市大气的污染程度，进而对济南市的环保提供必要的数据。
Samples of total suspended particles in atmosphere were collected on glass fibre filters by high - volume samplers, PCBs of which were extracted by Soxhlet extractors, concentrated and then analyzed qualitatively and quantitatively by GC/MS. Through these methods we get a rapid and effective method of analyzing polychlorinated biphenyls in the atmospheric particulate of Jinan. It is shown that extraction efficiency would get optimum when extraction time was 24h, recycle rate was 3 -4 times per hour and solvent was mixture of dichloromethane and n - hexane which was 1 ： 1 and the volume was 200mL. Under this condition, PCBs were identified and analyzed qualitatively by GC/MS computer retrieval analysis and manual index. On the basis of the data the concentration of the PCBs was 0. 454ng/m^3 which was very high. Therefore it also established the basis of controlling and managing the environment pollution effectively of Jinan.
出处
《山东化工》
CAS
2008年第4期36-40,共5页
Shandong Chemical Industry
