Li Xiang, Zhong Ming, Chen Jianmin
Department of Environmental Science and Engineering, Fudan University, Shanghai, China.
J Sep Sci. 2008 Aug;31(15):2839-45. doi: 10.1002/jssc.200800156.
The study on the performance of polyaniline as a fiber coating for solid-phase microextraction (SPME) purposes has been reported. Polyaniline coatings were directly electrodeposited on the surface of a stainless steel wire and applied for the extraction of some organochlorine pesticides (OCPs) from water samples. Analyses were performed using GC-electron capture detection (GC-ECD). The results obtained show that polyaniline fiber coating is suitable for the successful extraction of organochlorine compounds. This behavior is most probably due to the porous surface structure of polyaniline film, which provides large surface areas and allowed for high extraction efficiency. Experimental parameters such as adsorption and desorption conditions were studied and optimized. The optimized method has an acceptable linearity, with a concentration range of 1-5000 ng/L. Single fiber repeatability and fiber-to-fiber reproducibility were less than 12 and 17%, respectively. High environmental resistance and lower cost are among the advantages of polyaniline fibers over commercially available SPME fibers. The developed method was applied to the analysis of real water samples from Yangtse River and Tianmu Lake.
已有关于聚苯胺作为用于固相微萃取（SPME）的纤维涂层性能的研究报道。聚苯胺涂层直接电沉积在不锈钢丝表面，并用于从水样中萃取一些有机氯农药（OCPs）。分析采用气相色谱 - 电子捕获检测（GC - ECD）进行。所得结果表明，聚苯胺纤维涂层适用于成功萃取有机氯化合物。这种行为很可能归因于聚苯胺膜的多孔表面结构，其提供了大的表面积并实现了高萃取效率。对吸附和解吸条件等实验参数进行了研究和优化。优化后的方法具有可接受的线性，浓度范围为1 - 5000 ng/L。单纤维重复性和纤维间重现性分别小于12%和17%。与市售SPME纤维相比，聚苯胺纤维具有高环境耐受性和低成本等优点。所开发的方法应用于长江和天目湖实际水样的分析。
