Determination of water by liquid chromatography using conductometric detection

Autor:	Timothy S. Stevens, Karen M. Chritz, Hamish Small
Rok vydání:	1987
Předmět:	Column chromatography Chromatography Conductometry Trace Amounts Elution Chemistry Thermal conductivity detector Oxidizing agent Gas chromatography Analytical Chemistry Karl Fischer titration
Zdroj:	Analytical Chemistry. 59:1716-1720
ISSN:	1520-6882 0003-2700
DOI:	10.1021/ac00140a028
Popis:	Most determinations for water are easily made by a Karl Fischer titration but interferences are known including oxidizing agents, unsaturated compounds, and thio compounds. Gas chromatography (GC) can be both rapid and sensitive but some components of a sample can elute slowly or decompose on-column and interfere. This contribution describes the determination of water by liquid chromatography with a conductivity detector. The inclusion of an acid in the eluent significantly improved sensitivity of detection, which was limited at about 2.5 ppm. At the 20% water level, precision of determination was 0.22%. Examples are shown for the determination of water in samples that interfered with GC and/or Karl Fischer methods.
Databáze:	OpenAIRE
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