Abstract
A gas chromatographic method is described for the identification and quantitation of nanogram amounts of a α-tocopherol, phytyl ubiquinone, vitamin K 1, and homologs of the vitamin K 2 (menaquinone) family. By changing the conditions, principally the column temperature, it has been possible to chromatograph reproducibly all of the homologs between MK-1 and MK-7. The use of the trimethylsilyl ether of phylloquinone in GLC was not profitable because of the susceptibility of this derivative to hydrolysis and the resulting hydroquinone to oxidation. Preparative GLC was applied to both phylloquinone and menaquinone-4 in 10–20 microgram quantities and 40% of the injected material was recovered unchanged in the effluent stream.
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