The determination of light petroleum residues in refined oils and fats | Zendy

Downes M. J. | Zendy; Rossell J. B. | Zendy

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The determination of light petroleum residues in refined oils and fats

Author(s) -

Downes M. J.,

Rossell J. B.

Publication year - 1984

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/bf02542161

Subject(s) - repeatability , hexane , pentane , heptane , chromatography , chemistry , petroleum , octane , vegetable oil , coefficient of variation , light crude oil , analytical chemistry (journal) , organic chemistry

A rapid, direct injection gas liquid chromatographic (GLC) method for determining residual light petroleum in edible vegetable oils has been developed. The response is linear at levels between 0.05–0.5 mg hexane/kg oil. A sample containing 0.2 mg hexane/kg oil was analyzed for repeatability, giving a standard deviation of 0.008 mg/kg, equivalent to a coefficient of variation of 4%. Separation of pentane, hexane, heptane, octane and decane was obtained by this method. A survey of 23 samples of freshly refined vegetable oils obtained from 13 U.K. refiners in 1981 showed that these all contained less than 0.05 mg hexane/kg oil.

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