苯-丙聚合物-SE30复合固相微萃取涂层的研究与应用

Research on complex coating of phenylethylenethyl acrylate copolymer as solid-phase microextraction materyial and it's application

以苯乙烯-丙烯酸乙酯共聚物与色谱固定液SE30结合作为固相微萃取头涂层。考察了复合涂层的热稳定性及其与纤维结合能力。自制了 SPME装置。采用HS-SPME-GC技术萃取分析了水中一氯苯、二氯苯、三氯苯。以色谱峰高对浓度作外标曲线,在10-100mg/L范围内,一氯苯、二氯苯、三氯苯的线性相关系数分别为0.9968、0.9976、0.9904,最低检测限分别为0.32 mg／L、0.27 mg／L、0.50 mg/L。样品测试中,相对标准偏差(n=5)分别为5.37％、4.78％、6.63％,加标平均回收率分别为94.4％、96.7％、94.2％。将自制涂层与商品涂层(PDMS、PA)对水中氯代芳烃化合物萃取量进行了比较,实验结果表明苯乙烯丙烯酸乙酯聚合物-SE-30复合涂层对芳烃化合物具有优良的吸附特性。

Phenylethylene-ethyl acrylate Copolymer was synthesized.The copolymer combined with polymethysilo-xane to make SPME extraction complex coating.The thermostability of the coating was investigated by thermal analysis and observing coating state being heated.Spme equipment was made by ourselves.The coating was used to detect monochlorobenzene ,dichlorobenzene and trichlorobenzene by using HS-SPME-GC united technology. Equlibrium temperature and extraction time were chosen. In 10mg/L -100mg/L,the linear relationships beteen the contents of com-pents and their peak heights is good.The correlation coefficients of monochlorobenzene , dichlorobenzene and trichlorobenzene were 0.9968 , 0.9976 , 0.9904 respectively. The detection limits of monochlorobenzene ,dichlorobenzene and trichlorobenzene were 0.32 mg/L ,0.27 mg/L ,0.50 mg/L respectively and the corresponding average recoveries were94.4% , 96.7% , 94.4%.The coating compare with commercial SPME coating (PDMS, PA)for extracting chloroarenes in water.The experiment results indrcated that the complex coating has particular property for extracting chloroarenes.