Supercritical fluid extraction of sulfonylureas from aqueous matrices

被引：5

作者：

Betz, LR ^{[1
]}

Anderson, GA

McNally, ME

机构：

[1] Widener Univ, Dept Chem, Chester, PA 19013 USA

[2] EI Du Pont de Nemours & Co Inc, Dept Agr Prod, Expt Stn, Wilmington, DE 19880 USA

[3] Widener Univ, Dept Chem, Chester, PA 19013 USA

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES | 1999年 / 34卷 / 02期

关键词：

supercritical fluid extraction; sulfonylureas; aqueous matrices;

D O I：

10.1080/03601239909373191

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Extraction of sulfonylurea herbicides (thermally labile and moderately polar compounds) from aqueous matrices using a dynamic SFE system and supercritical carbon dioxide has been investigated. The results show the effect of varying typical SFE variable parameters such as co-solvent choice and composition, as well as pressure on the extraction efficiency. In addition, comparison studies demonstrating a significant extraction efficiency enhancement using "salting-out" techniques with aqueous matrices are also presented along with a suggested theoretical mechanism. High Performance Liquid Chromatography (HPLC) with UV detection was used to determine extraction efficiency. The following optimum operating conditions: 10 % acetonitrile, 20 % sodium chloride, 4500 psi and 60 degrees C, provide extraction results of 90 (+/- 10) %.

引用

页码：171 / 192

页数：22

共 23 条

[1] SELECTIVITY OF SUPERCRITICAL COMPOUNDS AND ENTRAINERS WITH RESPECT TO MODEL SUBSTANCES [J].