Open AccessReactions of polyphenols in pomegranate peel with nitrite under simulated stomach conditions
Author(s) -
Xie Zhenjian,
Li Xiaohong,
Tang Renyong,
Wang Guoze,
Lu Yurong,
Li Xuemei,
Cheng Kun,
Li Linzhi,
He Qiang
Publication year - 2019
Publication title -
food science and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 27
ISSN - 2048-7177
DOI - 10.1002/fsn3.1173
Subject(s) - ellagic acid , polyphenol , chemistry , food science , sodium nitrite , nitrite , nitroso compounds , gallic acid , antioxidant , traditional medicine , biochemistry , organic chemistry , medicine , nitrate
Punicalagin and ellagic acid are the major polyphenols present in pomegranate peels. The contents of α‐punicalagin, β‐punicalagin, and ellagic acid in the pomegranate peels were approximately 75, 72, and 20 µM, respectively. The reactions of polyphenols in pomegranate peels with sodium nitrite under simulated stomach conditions were studied. The reactions decreased the polyphenolic contents of the pomegranate peels and accompanied the formation of nitroso compounds. The oxidation rates followed the order ellagic acid α‐punicalagin ≈ β‐punicalagin. The results suggested that the reactions can occur in the stomach after a meal, while the pH changes from 2 to 4.5.