Retention characteristics of polybutadiene-coated zirconia and comparison to conventional bonded phases.
Retention characteristics of polybutadiene-coated zirconia and comparison to conventional bonded phases.
复制标题
聚丁二烯涂层氧化锆的保留特性以及与传统键合相的比较。
DOI：
10.1021/ac951178k
复制
发表时间：
1996
影响因子：
7.4
通讯作者：
Carr,PW
中科院分区：
文献类型：
--
作者：
Li,J;Carr,PW
本文详细研究了在多孔氧化锆表面包覆聚丁二烯(PBD)制得的反相材料的滞留性能。采用蒸发沉积和交联法制备了6种不同碳负载量(0.25g/−、5.6g/L)包覆的氧化锆颗粒。在20%~50%(v/v)的甲醇、−水和乙腈−水混合物中，一系列烷基苯类同系物在六个PBD相上的保留数据随流动相组成的变化而变化。并与传统的十八烷基硅烷键合相的结果进行了比较，详细研究了PBD用量对保留率的影响。我们发现，在键合相的数量上，PBD相的保留率低于ODS相，但它具有类似的疏水选择性。此外，PBD相对流动相组成变化的敏感性与消耗臭氧层物质相相同，其溶质形状选择性类似于单体消耗臭氧层物质相。最后，我们得出结论，保留主要是由类似分区的过程引起的。
This paper presents a detailed study of retention on a reversed-phase material made by coating polybutadiene (PBD) on porous zirconia. PBD-coated zirconia particles with six different carbon loads (0.25−5.6% carbon by weight) were prepared by evaporatively depositing and cross-linking PBD on microparticulate porous zirconia. Retention data of a homologous series of alkylbenzenes were obtained on the six PBD phases as a function of mobile phase composition in methanol−water and acetonitrile−water mixtures from 20 to 50% (v/v). The results obtained for the phase were compared to those for conventional octadecylsilane (ODS) bonded phases, and the effect of the amount of PBD on retention was studied in detail. We find that, per amount of bonded phase, the PBD phase is less retentive than is the ODS phase, but it has comparable hydrophobic selectivity. Furthermore, the PBD phase has about the same sensitivity toward changes in mobile phase composition as does the ODS phase, and its solute shape selectivity is similar to that of a monomeric ODS phase. Finally, we conclude that retention arises primarily from a partition-like process.