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| Analysis of physicochemical properties of tea seed oil and selection of antioxidants |
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| KeyWord:tea seed oil physicochemical property natural antioxidant cosmetic base oil |
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| Abstract: |
| The physicochemical properties and fatty acid composition of tea seed oil were analyzed, and the effects of natural antioxidants on oxidative stability of tea seed oil were studied to select the optimal antioxidant. The results showed that the acid value, peroxide value and color were 0.216 1 mgKOH/g, 0.266 4 mmol/kg and Y0.5 R0（25.4 mm groove） respectively. The tea seed oil was clear, transparent and had no peculiar smell. The fatty acids of tea seed oil were mainly composed of oleic acid（63.580%）, linoleic acid（26.460%） and palmitic acid（8.697%）, and the content of unsaturated fatty acid was above 90%. Tea seed oil was suitable for cosmetic base oil. With BHT as positive control, when dosage of antioxidant was 0.02%, the antioxidant effect of rosemary extract was the strongest, followed by tea polyphenols and BHT, VC palmitate, coenzyme Q, blank control and VE. When dosage of rosemary extract was 0.02%, tea seed oil had the strongest antioxidation capacity and citric acid of 0.01% had a certain synergism to the rosemary extract of 0.02% at later antioxidation period of tea seed oil. |
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