Chromatographic evaluation of self-immobilized stationary phases for reversed-phase liquid chromatography

被引：16

作者：

Bottoli, CBG ^{[1
]}

Collins, KE ^{[1
]}

Collins, CH ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Quim, LABCROM, Lab Pesquisas Cromatog Liquida, BR-13084971 Campinas, SP, Brazil

来源：

JOURNAL OF CHROMATOGRAPHY A | 2003年 / 987卷 / 1-2期

关键词：

stationary phases; LC; poly(methyloctylsiloxane);

D O I：

10.1016/S0021-9673(02)01535-2

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The preparation of stationary phases for HPLC using polymers deposited on silica usually includes an immobilization step involving cross-linking by free radicals induced by ionizing radiation or by other radical initiators. The present paper reports changes which occur at ambient temperature in the character of poly(methyloctylsiloxane) deposited on porous silica particles as a function of the time interval between particle loading and column packing. Column performance and retention factors increase with time and these changes are attributed to rearrangement (self-assembly) which result in "self-immobilization" of the polymer molecules on the silica surface. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：87 / 92

页数：6

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