✦ LIBER ✦

Liquid trapping after supercritical fluid extraction with modified carbon dioxide

✍ Scribed by Thompson, P. G. ;Taylor, Larry T.

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 546 KB
Volume: 17
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240171106

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✦ Synopsis

Abstract

A polarity test mix consisting of acetophenone, N,N‐dimethylaniline, naphthalene, 2‐naphthol, and n‐tetracosane was spiked onto sand and extracted with carbon dioxide modified with acetonitrile, methanol, or toluene. The extracts were collected in chloroform, hexane, methanol, or a mixed collection solvent consisting of equal parts chloroform‐hexane‐methanol. The mixed collection solvent which showed excellent recoveries for pure CO~2~, had the worst recoveries of all the collection solvents with modified CO~2~. Overall hexane was the best collection solvent studied for these analytes under these extraction conditions.

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