Letter | Published:

Improved Gas Chromatography of Unesterified Fatty Acids

Nature volume 192, pages 966967 (09 December 1961) | Download Citation

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Abstract

IT has been demonstrated by Böttcher et al.1 and by Hunter et al.2 that unesterified fatty acids can be separated, by gas chromatography, by the use of ‘liquid’ phases of the polyester type. Metcalfe3 has pointed out the necessity to have a highly acidic ‘liquid’ phase in order to suppress the association of the carboxyl group of the fatty acids, and has shown that the separation of C4–C22 fatty acids is very much improved by the incorporation of phosphoric acid in the polyester ‘liquid’ phase. Using a column packing of ‘Celite 545’ previously coated with 25 per cent of diethylene glycol adipate polyester and 2 per cent of phosphoric acid, mixtures of fatty acids were separated at temperatures of 220–235° C., yielding well-defined symmetrical peaks and separating saturated and unsaturated acids from each other.

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References

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    , , and , J. Chromatogr., 3, 582 (1960).

  2. 2.

    , , and , Anal. Chem., 32, 682 (1960).

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    , Nature, 188, 142 (1960).

  4. 4.

    , and , Gas Chromatography, edit. by Desty, D. H., 6 (Butterworths Scientific Pub., London, 1958).

  5. 5.

    , , and , Chem. Eng. Sci., 5, 271 (1956).

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Affiliations

  1. Armour Hess Chemicals, Ltd., Littleborough, Lancashire.

    • P. JOWETT
    •  & B. J. HORROCKS

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https://doi.org/10.1038/192966b0

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