COMBINATION OF SOLID PHASE EXTRACTION WITH SUPERCRITICAL FLUID EXTRACTION FOR THE DETERMINATION OF CONTAMINANTS IN WATER

The applicability of supercritical fluid extraction was studied for the determination of mineral oil contaminants in the presence of non-ionic surfactants in water after a prior preconcentration on a solid sorbent. The species representative of the two types of contaminants were retained first on a...

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Bibliographic Details
Published in:Journal of liquid chromatography & related technologies 2000-01, Vol.23 (10), p.1511-1522
Main Authors: Adam, M., Ventura, K., Jandera, P., Churáček, J.
Format: Article
Language:English
Subjects:
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Exact sciences and technology
Natural water pollution
Pollution
Spectrometric and optical methods
Water treatment and pollution
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Summary:The applicability of supercritical fluid extraction was studied for the determination of mineral oil contaminants in the presence of non-ionic surfactants in water after a prior preconcentration on a solid sorbent. The species representative of the two types of contaminants were retained first on a solid sorbent Separon SGX C18. Under optimized conditions supercritical fluid extraction (SFE) with carbon dioxide was used in the first step to extract selectively mineral oil, to be determined by FTIR in a carbon tetrachloride solution. In the second step, SFE with carbon dioxide modified with 5 % (v/v) of methanol yielded a selective and quantitative separation of a non-ionic surfactant into methanol with UV spectrometric finish. A new design of column for retention of species from SFE with the use of a solid sorbent was also developed and tested.
ISSN:1082-6076
1520-572X
DOI:10.1081/JLC-100100431