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On-line trace enrichment on a reversed-phase pre-column for normal-phase liquid chromatography with electron-capture detection

✍ Scribed by F.A. Maris; J.A. Stäb; G.J. de Jong; U.A.Th. Brinkman

Book ID
104145724
Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
672 KB
Volume
445
Category
Article
ISSN
1873-3778

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✦ Synopsis

The trace enrichment of chlorophenols in aqueous samples has been achieved through a technique involving sorption on a liquid chromatographic (LC) pre-column packed with a styrenedivinylbenzene copolymer, drying of the pre-column with nitrogen and desorption. Analysis was carried out by normal-phase LC with on-line electron-capture detection. For the pre-concentration of 0.4 ml of standard solutions, recoveries of 70-l 10% were observed. Breakthrough volumes of di-and higher chlorinated phenols were over 40 ml, which allowed their detection down to low-ppt levels. The applicability of the method was tested on tap water, river water and urine samples.

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