Continuous liquid‐liquid extraction combined on‐line with capillary gas chromatography‐atomic emission detection for environmental analysis
作者:
Elise C. Goosens,
Dirk De Jong,
Gerhardus J. de Jong,
Feddy D. Rinkema,
Udo A. Th. Brinkman,
期刊:
Journal of High Resolution Chromatography
(WILEY Available online 1995)
卷期:
Volume 18,
issue 1
页码: 38-44
ISSN:0935-6304
年代: 1995
DOI:10.1002/jhrc.1240180109
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: On‐line extraction;Large volume introduction;Capillary gas chromatography;Atomic emission detection;Solvent venting;Pesticides;Ground water
数据来源: WILEY
摘要:
AbstractThe on‐line coupling of a liquid‐liquid extraction system with capillary gas chromatography using atomic emission detection (GC‐AED) has been studied. The required large volumes of about 100 μl of an iso‐octane solution can be introduced into the GC‐AED system by using the AED solvent vent and a solvent vapor exit in front of the capillary analytical column. Test solutions containing several pesticides were detected using the carbon, chlorine, nitrogen and sulfur channels. Analyte detectability (in concentration units) was improved significantly and low concentractions of the test compounds could be determined (1–5 ng/ml). Aqueous samples were on‐line extracted and analyzed. The precision of the large‐volume injection itself as well as the total extraction‐GC‐AED system was satisfactory (RSD ofca.2 and 4%, respectively). As a real‐life application, several ground water
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