Saito Yoshihiro, Tahara Ai, Imaizumi Motohiro, Takeichi Tsutomu, Wada Hiroo, Jinno Kiyokatsu
School of Materials Science, Toyohashi University of Technology, Toyohashi 441-8580, Japan.
Anal Chem. 2003 Oct 15;75(20):5525-31. doi: 10.1021/ac030052h.
Synthetic polymer filaments have been introduced as the support material in packed capillary gas chromatography (GC). The filaments of the heat-resistant polymers, Zylon, Kevlar, Nomex, and Technora, were longitudinally packed into a short fused-silica capillary, followed by the conventional coating process for open-tubular GC columns. The separation of several test mixtures such as n-alkylbenzenes and n-alkanes was carried out with these polymer-coated fiber-packed capillary columns. With the coating by various polymeric materials on the surface of these filaments, the retentivity was significantly improved over the parent fiber-packed column (without polymer coating) as well as a conventional open-tubular capillary of the same length. The results demonstrated a good combination of Zylon as the support and poly(dimethylsiloxane)-based materials as the coating liquid-phase for the successful GC separation of n-alkanes and polycyclic aromatic hydrocarbons (PAHs), while successful applications for other separations such as poly(ethylene glycol) coating for the separation of alcohols were also obtained. From the results it has been suggested that the selectivity of the fiber-packed column could be tuned by selecting different coating materials, indicating the promising possibility for a novel usage of fine fibrous polymers as the support material that can be combined with newly synthesized coating materials specially designed for particular separations. Taking advantage of good thermal stability of the fibers, the column temperature could be elevated to higher than 350 degrees C with the combination of a short metallic capillary.
合成聚合物长丝已被引入作为填充毛细管气相色谱（GC）中的支撑材料。将耐热聚合物Zylon、凯夫拉尔、诺梅克斯和Technora的长丝纵向填充到短的熔融石英毛细管中，然后进行开管GC柱的常规涂覆过程。使用这些聚合物涂覆的纤维填充毛细管柱对几种测试混合物（如正烷基苯和正烷烃）进行了分离。通过在这些长丝表面涂覆各种聚合物材料，与未涂覆聚合物的母纤维填充柱以及相同长度的常规开管毛细管相比，保留性得到了显著提高。结果表明，Zylon作为支撑材料与聚（二甲基硅氧烷）基材料作为涂覆液相相结合，可成功实现正烷烃和多环芳烃（PAHs）的GC分离，同时也成功应用于其他分离，如用聚（乙二醇）涂层分离醇类。从结果可以看出，通过选择不同的涂覆材料可以调节纤维填充柱的选择性，这表明精细纤维聚合物作为支撑材料与专门为特定分离设计的新合成涂覆材料相结合具有新的应用前景。利用纤维良好的热稳定性，结合短金属毛细管，柱温可升至350℃以上。
