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Synthesis and evaluation of an aromatic polymer-coated zirconia for reversed phase liquid chromatography

机译:反相液相色谱法合成芳族聚合物包覆的氧化锆及其评价

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We synthesized a novel aromatic polymer-coated zirconia-based RPLC stationary phase by chemical adsorption of a copolymer of chloromethylstyrene and diethoxymethylvinylsilane onto zirconia (CMS/VMS-ZrO2). Characterization of the pore structure of the support by nitrogen porosimetry and inverse size-exclusion chromatography indicates that CMS/VMS-ZrO2 maintains the well-defined pore structure of the base material. Flow studies show that CMS/VMS-ZrO2 has good mass transfer characteristics. The reversed-phase retention characteristics of the new support are comparable to those of conventional silica-bonded phases. We have also evaluated the mechanical, thermal, and pH stability of CMS/VMS-ZrO2. The results show that CMS/VMS-ZrO2 is stable over a very wide range of pH (pH = 1-13) and at temperatures as high as 160 degrees C. Chromatographic separations of some low molecular weight aromatic analytes on CMS/VMS-ZrO2 and octadecyl-bonded silica phases indicate that there are some subtle but significant differences in the chromatographic selectivity of these two types of phases. [References: 48]
机译:通过将氯甲基苯乙烯和二乙氧基甲基乙烯基硅烷的共聚物化学吸附到氧化锆上(CMS / VMS-ZrO2),我们合成了一种新型的芳香族聚合物包覆的基于氧化锆的RPLC固定相。通过氮气孔隙率法和逆尺寸排阻色谱法表征载体的孔结构表明,CMS / VMS-ZrO2保持了基材的良好定义的孔结构。流动研究表明,CMS / VMS-ZrO2具有良好的传质特性。新载体的反相保留特性与传统的硅胶键合相相当。我们还评估了CMS / VMS-ZrO2的机械,热和pH稳定性。结果表明,CMS / VMS-ZrO2在很宽的pH范围内(pH = 1-13)以及在高达160摄氏度的温度下都是稳定的。CMS / VMS-ZrO2上某些低分子量芳族分析物的色谱分离十八烷基键合的硅胶相和十八烷基键合的硅胶相表明,这两类相的色谱选择性存在一些细微但显着的差异。 [参考:48]

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