Abstract
AbstractAnalysis by gradient‐elution normal phase open column chromatography, thin layer chromatography and ultraviolet‐visible spectroscopy (confirmation by two to three peaks), including calculation of peak ratios, tentatively revealed seven previously unreported hydrocarbon carotenoids in palm oil fractions. They were phytoene, phytofluene, ξ‐carotene,α‐zeacarotene, β‐zeacarotene, neurosporene and δ‐carotene. In addi‐tion, the presence ofα‐,β‐ andδ‐carotenes and lycopene was confirmed. The carotenoid profiles of crude palm oil, crude palm olein and filtered palm olein were similar; carotenoids in these fractions totalled 700–800 ppm. Carotenoids were not found in refined, filtered and deodorized palm olein, while palm kernel oil contained 0.3 ppm ofα‐zeacarotene. The yield of hydrocarbon carotenoids was 30% lower in the absence of the antioxidant butylated hydroxytoluene.
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