EGCG氧化产物不同级分的分析及其抗氧化活性的研究

doi:10.13305/j.cnki.jts.2008.06.011

Abstract

Abstract: (-)-Epigallocatechin gallate (EGCG) was oxidized chemically and extracted under neutral, acidic condition value to obtain two extracts: fraction A (EOPA) and fraction B (EOPB). The antioxidant activities of EOP A, EOP B and EGCG were determined using a chemiluminescence technique. The components of two fractions were analyzed by HPLC-ESI-MS. Results showed that the EOP A possessed the strongest antioxidant activity in all test system followed by EGCG, EOP B in a decreasing order. HPLC-ESI-MS analysis showed that the oxidation products of EOP A and EOPB were all dimmers.

Key words: EGCG, oxidation products, chemiluminescence, antioxidant activity, HPLC-ESI-MS

CLC Number:

S571.1

QI Xiang-yang. Study on the Analysis and Antioxidant Activities of Different Extracts from (-)-Epigallocatechin Gallate Oxidation Products[J]. Journal of Tea Science, 2008, 28(6): 436-442.

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Study on the Analysis and Antioxidant Activities of Different Extracts from (-)-Epigallocatechin Gallate Oxidation Products

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