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Pyrolysis/gas chromatography/ion‐trap detection of polyphenols (vegetable tannins): Preliminary results
Author(s) -
Galletti Guido C.,
Reeves James B.
Publication year - 1992
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210270313
Subject(s) - chemistry , tannin , catechol , pyrolysis , chromatography , polyphenol , proanthocyanidin , pomace , mass spectrometry , gas chromatography , phenols , pyrolysis–gas chromatography–mass spectrometry , organic chemistry , food science , antioxidant
Tannins from sorghum grains with high and low tannin content, from grape skins and seeds and from apple pomace were analysed by pyrolysis/gas chromatography/ion‐trap detector mass spectrometry. Pyrolysis at 600°C produced catechol as a characteristic fragment of condensed tannins, and other phenolic compounds related to the lignified tissues. Catechol was also the main fragment in the pyrogram of catechin, a monomeric constituent of condensed tannins. Mass spectral data and relative quantifications of the pyrograms of several samples are provided. Quantitative data are discussed in terms of reproducibility and linearity of response and are compared with the results of a spectrophotometric assay for tannins.