Abstract
The difficulties due to chain length overlap in marine oil fatty acid ester gas-liquid chromatographic analyses may be greatly reduced by the use of a low polarity phase such as the organosilicone polyester EGSP-Z. With this phase the even-numbered chain length overlap is eliminated as a significant factor except in the one instance of docosahexaenoate and tetracosenoate. Certain approximations may be used with most common marine oils to quantitate critical pairs due to the C17 and C19 odd-numbered chain lengths. Retention data are given at 180° and 200° for a column of 3% EGSP-Z on 100–120 mesh Gas-Chrom Q.

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