Study of Characteristic Indexes and Fatty Acid Composition in Big-leaf Tea Plant (Camellia sinensis var. assamica) Seed Oils from Yunnan Province

WU Wanfu; LYU Shidong; YANG Xuefang; LI Yue; ZHANG Jiguang

doi:10.13305/j.cnki.jts.20210622.001

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Journal of Tea Science ›› 2021, Vol. 41 ›› Issue (4) : 463-470. DOI: 10.13305/j.cnki.jts.20210622.001

Study of Characteristic Indexes and Fatty Acid Composition in Big-leaf Tea Plant (Camellia sinensis var. assamica) Seed Oils from Yunnan Province

WU Wanfu^1,2,3, LYU Shidong^1,2,3, YANG Xuefang⁴, LI Yue⁵, ZHANG Jiguang^1,2,3,*

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Abstract

The characteristic parameters (refractive index, relative density, iodine value, saponification value) and fatty acid composition in five big-leaf tea plant (Camellia sinensis var. assamica) seed oils from Yunnan Province and other eight common edible vegetable oils were analyzed by chemical titration and gas chromatography (GC). The results show that the refractive index of the five big-leaf tea plant (Camellia sinensis var. assamica) seed oils ranged from 1.462 9-1.463 4. The relative density ranged from 0.914 8~0.916 7, iodine value was 859-903 g·kg^-1, saponification value was 189.0-193.2 g·kg^-1 palmitic acid contents were 14.29%-15.75%, oleic acid contents were 57.83%-61.41%, linoleic acid contents were 18.81%-23.11%. The saturated fatty acid contents ranged from 17.6% to 19.8%. Unsaturated fatty acid contents were 80.2%-82.4%. Overall, the fatty acid composition of big-leaf tea plant (Camellia sinensis var. assamica) seed oil was similar as the Camellia oleifera seed oil and olive oil. The ratio of saturated fatty acid, monounsaturated fatty acid and polyunsaturated fatty acid was about 1∶3∶1. Big-leaf tea plant (Camellia sinensis var. assamica) seed oil has the potential value for research, development and promotion.

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big-leaf tea plant seed oil / characteristic indexs / fatty acid composition / gas chromatography

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WU Wanfu, LYU Shidong, YANG Xuefang, LI Yue, ZHANG Jiguang. Study of Characteristic Indexes and Fatty Acid Composition in Big-leaf Tea Plant (Camellia sinensis var. assamica) Seed Oils from Yunnan Province[J]. Journal of Tea Science. 2021, 41(4): 463-470 https://doi.org/10.13305/j.cnki.jts.20210622.001

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