APPLICATION OF MIXED-MODE, SOLID-PHASE EXTRACTION IN ENVIRONMENTAL AND CLINICAL-CHEMISTRY - COMBINING HYDROGEN-BONDING, CATION-EXCHANGE AND VANDERWAALS INTERACTIONS

被引:37
作者
MILLS, MS [1 ]
THURMAN, EM [1 ]
PEDERSEN, MJ [1 ]
机构
[1] CLIN REFERENCE LAB,LENEXA,KS 66214
来源
JOURNAL OF CHROMATOGRAPHY | 1993年 / 629卷 / 01期
关键词
D O I
10.1016/0021-9673(93)80349-D
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Silica- and styrene-divinylbenzene-based mixed-mode resins that contain C-8, C18 and sulphonated cation-exchange groups were compared for their efficiency in isolation of neutral triazine compounds from water and of the basic drug, benzoylecgonine, from urine. The triazine compounds were isolated by a combination of Van der Waals and hydrogen-bonding interactions, and benzoylecgonine was isolated by Van de Waals interactions and cation exchange. All analytes were eluted with a polar organic solvent containing 2% ammonium hydroxide. Larger recoveries (95%) were achieved on copolymerized mixed-mode resins where C18 and sulfonic acid are in closer proximity than on ''blended'' mixed-mode resins (60-70% recovery).
引用
收藏
页码:11 / 21
页数:11
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