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Rapid quantitative determination of residual hexane in oils by direct gas chromatography
Author(s) -
Dupuy H. P.,
Fore S. P.,
Rayner E. T.
Publication year - 1975
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02545088
Subject(s) - hexane , glass wool , chromatography , gas chromatography , solvent , elution , residual , chemistry , residual oil , wool , inlet , analytical chemistry (journal) , materials science , composite material , organic chemistry , algorithm , layer (electronics) , computer science , engineering , mechanical engineering
A simple, direct, gas chromatographic technique is described for the quantitative determination of residual hexane in extracted vegetable oils. The method if rapid and sensitive to one ppm hexane. The inlet liner of a gas chromatograph was packed with 1 1/2 in. glass wool, and 25 mg oil was added onto it. The sample was capped with a small plug of glass wool, and the liner was inserted in the heated inlet of the gas chromatograph. Residual hexane rapidly eluted onto the Poropak P column by heat, and carrier gas was resolved in 20 min by temperature programing between 70–180 C. The method appears useful for monitoring continuous solvent removal processes.