以聚甲基苯基乙烯基硅氧烷为主要成分,采用溶胶-凝胶技术和自由基引发交联反应的方法首次制备了一种固相微萃取新涂层,并与气相色谱联用,分析了芳香族化合物,考察了它的萃取性能.结果表明:该涂层提供了大的比表面积,可获得高的萃取效率.与相应的商用固相微萃取涂层相比,该涂层具有更好的灵敏度和选择性,且热稳定性好,使用寿命长.
Poly (methylphenylvinylsiloxane) (PMPVS) coating for solid-phase microextraction (SPME) was first prepared by using sol-gel approach and cross-linking of free radical initiation. The extraction properties of the novel coating for aromatic compounds were investigated using a self-made SPME device coupled with a gas chromatograph-flame ionization detector (GC-FID). The coating provided high surface areas and allowed high extraction efficiency. Compared with some commercial SPME stationary phases, the new phase showed better selectivity and sensitivity toward aromatic compounds. Furthermore, PMPVS coating showed good thermal stability and longer lifetime.
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