Study of glassy carbon composites coatings for solid-phase microextraction

• 作 者: JingbinZeng[1]BinbinYu[1]LimeiZhang[1]XiChen[2]
• 机 构: Department of Chemistry and the Key Laboratory of Analytical Sciences of the Ministry of Education,
• 出 处: DaLian Internationall Symposia and Exhibition on Chromatogra
• 发表日期: 2007年期

　　Solid Phase Microextraction (SPME) has been widely applied in many disciplines due to its rapid, solventless, sensitive and time efficient properties.SPME is based on the partitioning between samples and extracting phases, which is typically immobilized on the fused silica fiber or metal wires.In general, the coating of the fiber is considered as the most important part of SPME technique because different kinds (species) of analytes require different coatings.Currently, only seven kinds of SPME fibers are available in commerce.In addition to polymeric materials as PDMS and PA, other fiber coatings based on solid sorbents, such as PDMS/DVB, CAR/PDMS, CW/DVB, CW/TPR and Carbowax/DVB, are also commercially available.Although these commercial fibers are widely applied, there are still some drawbacks such as fragility of the fiber, nonresistant to high temperature and organic solvent, high cost and short-life usability (<100 times).In this research work, we demonstrated a feasible approach for SPME application, by which the glassy carbon was immobilized on a stainless wire.The scanning electron microscopy experiment showed that the new coating material provided a large surface area and thus presented high extraction efficiency for extraction objectives.In addition, compared to commercial SPME fibers, the new coating material exhibited high thermal, solvent and mechanical stability, which would dramatically enhance the usability of the new fiber.