Blood lipids. 4. The isolation of 3,7,11,15-tetramethylhexadecanoic acid (phytanic acid) from ox-plasma lipids

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Abstract
Phytanic acid (3, 7, 11, 15-tetramethyl-hexadecanoic acid) was isolated from ox-plasma lipids. The identity of the acid was established by a study of the products obtained by oxidative degradation and confirmed by showing that it was in-distinguishable in respect of its gas-liquid-chromatographic properties and infrared-absorption spectrum from an authentic specimen of the acid. The gas-liquid-chromatographic behaviour of branched-chain acids is briefly discussed, as also is the possibility that plasma phytanic acid may be derived from the phytol moiety of feed chlorophyll.