Comparative study on antioxidative activity in vitro of different polar parts of longan kernels from Luzhou City and Guangzhou City

doi:10.14088/j.cnki.issn0439-8114.2023.10.017

Abstract

Abstract: The antioxidant activity in vitro of different polar parts of Longan（Dimocarpus longan） kernels produced in Luzhou City, Sichuan Province and Guangzhou City, Guangdong Province were studied. The antioxidant activity of longan kernels from Luzhou Zhangba, Luzhou Huangyi and Guangzhou Liwan were extracted by 5 solvents with different polarities. The antioxidant activity of extracts was compared by DPPH and ABTS⁺· methods. The results showed that the weight of dry extracts of longan kernels from 3 producing areas （except Luzhou Zhangba）was n-butanol> ethyl acetate> anhydrous ethanol > deionized water > petroleum ether. The results of the in vitro antioxidant test showed that in DPPH method, except petroleum ether extract from longan kernels of Guangzhou Liwan producing area, all polar extract from other producing areas had higher free radical scavenging rate, and the ethyl acetate extract from Guangzhou Liwan producing area and Luzhou Zhangba producing area had the best antioxidant capacity, with IC₅₀ of 0.021 mg/mL and 0.022 mg/mL, respectively. In ABTS⁺· method, the petroleum ether extract of longan kernels from all producing areas had the strongest ability to remove ABTS⁺ free radicals, followed by ethyl acetate extract, and Luzhou Zhangba longan kernels extract had the best antioxidant ability, with IC₅₀ of 0.023 mg/mL.

Key words: longan（Dimocarpus longan） kernels, different polar parts, antioxidant activity in vitro, free radical scavenging rate, Luzhou City, Guangzhou City

CLC Number:

CHEN Yong-jun, DAI Liang-min, DAI Liang-ping, ZHANG Chun, WANG Yan. Comparative study on antioxidative activity in vitro of different polar parts of longan kernels from Luzhou City and Guangzhou City[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(10): 95-99.

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