POST-EXTRACTION SOLVENT FLUSH OF THE PRESSURE RESTRICTOR IN SUPERCRITICAL FLUID EXTRACTION

被引：11
|
作者：
THOMSON, CA [1 ]
CHESNEY, DJ [1 ]
机构：
[1] MICHIGAN TECHNOL UNIV, DEPT CHEM & CHEM ENGN, HOUGHTON, MI 49931 USA
来源：
JOURNAL OF CHROMATOGRAPHY | 1991年 / 543卷 / 01期
关键词：
D O I：
10.1016/S0021-9673(01)95767-X
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
When using supercritical fluid extraction to isolate and concentrate pesticide residues from plant tissue samples, extraneous components of the plant matrix are extracted in sufficient quantity to cause intermittent obstruction of the pressure restrictor. In some cases, termination of the extraction occurs due to irreversible plugging of the restrictor. It has been determined that a post-extraction solvent flush of the pressure restrictor is sufficient to prevent restrictor obstruction in almost all cases.
引用
收藏
页码：187 / 194
页数：8
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