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Research on the extraction methods of tannin from persimmon (Diospryros kaki L) fruit

Shi Bao-qin

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Abstract

The best extraction conditions of total polyphenols and condensed tannins from persimmon fruit were studied. Total polyphenols and condensed tannins were assayed using Folin-Denis method and improved vanillin-HCl method respectively. Among the orthogonal test, 100% methanol, containing 1% concentrated HCl is the best extraction solvent, the optimize extraction condition were: extraction temperature 90℃, extraction time 40min and the ratio of solid to liquid is 1∶12, extraction three times.

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What this paper is about

The best extraction conditions of total polyphenols and condensed tannins from persimmon fruit were studied. Total polyphenols and condensed tannins were assayed using Folin-Denis method and improved vanillin-HCl method respectively. Among the orthogonal test, 100% methanol, containing 1% concentrated HCl is the best extraction solvent, the optimize extraction condition were: extraction temperature 90℃, extraction time 40min and the ratio of solid to liquid is 1∶12, extraction three times.

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Available abstract

The best extraction conditions of total polyphenols and condensed tannins from persimmon fruit were studied. Total polyphenols and condensed tannins were assayed using Folin-Denis method and improved vanillin-HCl method respectively. Among the orthogonal test, 100% methanol, containing 1% concentrated HCl is the best extraction solvent, the optimize extraction condition were: extraction temperature 90℃, extraction time 40min and the ratio of solid to liquid is 1∶12, extraction three times.

Key concepts: Tannin, Extraction (chemistry), Polyphenol, Vanillin, Proanthocyanidin, Chemistry, Diospyros kaki, Condensed tannin

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