%0 Journal Article
%T A Gas Chromatographic Method to Decrease the Detection Limit of Trace Benzene in CS-2 Extract<br>降低二硫化碳萃取液中痕量苯检出下限的气相色谱法
%A ZHANG Ai
%A |li
%A ZHOU Ji
%A |ti
%A WANG Dong
%A LIN Wei
%A XIANG Xue
%A |min
%A <br>张爱丽
%A 周集体
%A 王栋
%A 林微
%A 项学敏
%J 色谱
%D 1999
%I 
%X A method to decrease the detection limit of trace benzene in CS2 extract from coastal water by gas chromatography has been studied. A direct injection port (Shimadzu WBI-17) and a 2 m x 2 mm i.d. column packed with Chromosorb W(AW-DMCS) coated with 10% SE-30 was used. It is simpler and has low detection limit, small sample amount and high repeatability. The experiment showed that the trace water in the organic phase and the too small purge flow of the direct injection port could cause serious tailing of CS2 peak. There was an optimum value of the purge flow (purge flow/total flow = 5%). The minimum detectable limit of benzene was 4 micrograms/L. The repeatability (RSD) was better than 6% and the average recovery was 96.7%.
%K gas chromatography
%K direct injection port
%K CS\-2 extraction
%K coastal water
%K benzene<br>海洋监测
%K 气相色谱
%K 二硫化碳
%K 萃取
%K 海水
%K 苯
%K 测定
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=D7F5F79B7B81B8626702B3D0B34190C5&yid=B914830F5B1D1078&vid=BCA2697F357F2001&iid=B31275AF3241DB2D&sid=4720E9D07E8A2290&eid=4158386E7B9422C8&journal_id=1000-8713&journal_name=色谱&referenced_num=7&reference_num=2