Abstract
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.
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References
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Dupuy, H.P., S.P. Fore, and L.A. Goldblatt, JAOCS 50:340 (1973).
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ARS, USDA.
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Dupuy, H.P., Fore, S.P. & Rayner, E.T. Rapid quantitative determination of residual hexane in oils by direct gas chromatography. J Am Oil Chem Soc 52, 118–120 (1975). https://doi.org/10.1007/BF02545088
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DOI: https://doi.org/10.1007/BF02545088