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Study of the release of gallic acid from (-)-epigallocatechin gallate in old oolong tea by mass spectrometry.
Rapid Commun Mass Spectrom. 2010 Apr 15; 24(7):851-8.RC

Abstract

Liquid chromatography combined with multiple-stage mass spectrometry (LC/MS(n)) was used to study the pathway of the release of gallic acid (GA) from epigallocatechin gallate (EGCG) in infusion of old oolong tea. The possibility of releasing GA from EGCG in old tea preparations was supported by an in vitro observation of GA degraded from EGCG under heating conditions mimicking the drying process. Negative electrospray ionization with the data-dependent mode of MS(n) was used to study the formation pathway of GA in old oolong tea. The MS(n) data show that GA was released from the dimer of EGCG, not directly degraded from EGCG.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Lee RJ
Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, ROC.
Lee VS
No affiliation info available
Tzen JT
No affiliation info available
Lee MR
No affiliation info available

MeSH

CatechinChromatography, LiquidDimerizationGallic AcidModels, MolecularSpectrometry, Mass, Electrospray IonizationTeaTime Factors

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20201026

Citation

Lee, Ren-Jye, et al. "Study of the Release of Gallic Acid From (-)-epigallocatechin Gallate in Old Oolong Tea By Mass Spectrometry." Rapid Communications in Mass Spectrometry : RCM, vol. 24, no. 7, 2010, pp. 851-8.
Lee RJ, Lee VS, Tzen JT, et al. Study of the release of gallic acid from (-)-epigallocatechin gallate in old oolong tea by mass spectrometry. Rapid Commun Mass Spectrom. 2010;24(7):851-8.
Lee, R. J., Lee, V. S., Tzen, J. T., & Lee, M. R. (2010). Study of the release of gallic acid from (-)-epigallocatechin gallate in old oolong tea by mass spectrometry. Rapid Communications in Mass Spectrometry : RCM, 24(7), 851-8. https://doi.org/10.1002/rcm.4442
Lee RJ, et al. Study of the Release of Gallic Acid From (-)-epigallocatechin Gallate in Old Oolong Tea By Mass Spectrometry. Rapid Commun Mass Spectrom. 2010 Apr 15;24(7):851-8. PubMed PMID: 20201026.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Study of the release of gallic acid from (-)-epigallocatechin gallate in old oolong tea by mass spectrometry. AU - Lee,Ren-Jye, AU - Lee,Viola S Y, AU - Tzen,Jason T C, AU - Lee,Maw-Rong, PY - 2010/3/5/entrez PY - 2010/3/5/pubmed PY - 2010/6/22/medline SP - 851 EP - 8 JF - Rapid communications in mass spectrometry : RCM JO - Rapid Commun Mass Spectrom VL - 24 IS - 7 N2 - Liquid chromatography combined with multiple-stage mass spectrometry (LC/MS(n)) was used to study the pathway of the release of gallic acid (GA) from epigallocatechin gallate (EGCG) in infusion of old oolong tea. The possibility of releasing GA from EGCG in old tea preparations was supported by an in vitro observation of GA degraded from EGCG under heating conditions mimicking the drying process. Negative electrospray ionization with the data-dependent mode of MS(n) was used to study the formation pathway of GA in old oolong tea. The MS(n) data show that GA was released from the dimer of EGCG, not directly degraded from EGCG. SN - 1097-0231 UR - https://www.unboundmedicine.com/medline/citation/20201026/Study_of_the_release_of_gallic_acid_from_____epigallocatechin_gallate_in_old_oolong_tea_by_mass_spectrometry_ L2 - https://doi.org/10.1002/rcm.4442 DB - PRIME DP - Unbound Medicine ER -