Comparison of thermal and non-thermal extraction methods on free and bound phenolics in pomegranate peel
文献类型： 外文期刊
作者： Man, Guowei 1 ; Ma, Yan 2 ; Xu, Lei 1 ; Liao, Xiaojun 1 ; Zhao, Liang 1 ;
作者机构： 1.China Agr Univ, Coll Food Sci & Nutr Engn, Natl Engn Res Ctr Fruit & Vegetable Proc, Key Lab Fruit & Vegetable Proc,Minist Agr & Rural, Beijing 100083, Peoples R China
2.Xinjiang Acad Agr Sci, Inst Agroprod Storage & Proc, Xinjiang Deeper Proc & Engn Technol Res Ctr Main B, Urumqi 830091, Peoples R China
关键词： Pomegranate peel; Free and bound phenolics; Thermal and non -thermal extraction methods; UHPLC-QTOF-MS; UPLC-QQQ-MS
期刊名称：INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES （ 影响因子：6.6； 五年影响因子：7.0 ）
ISSN： 1466-8564
年卷期： 2023 年 84 卷
页码：
收录情况： SCI
摘要： Pomegranate peel is a valuable byproduct for phenolic extraction. However, comprehensive analysis on novel extraction methods is lacking. In this study, free and bound phenolics, extracted by thermal (heating) and non -thermal methods (conventional solvent, high pressure, and ultrasound), were systematically compared by UHPLC-QTOF-MS and UPLC-QQQ-MS. The total content of free phenolics, approximately 10 times to that of bound phenolics, showed no significant difference across different extraction methods. The highest yield of bound phenolics was obtained by heating and high-pressure methods and the composition was closely dependent on the degree of alkaline hydrolysis. Many of bound phenolics obtained by thermal extraction were small molecules. Meanwhile, a greater proportion of larger compounds were obtained by high-pressure extraction, indicating that high pressure was gentler than thermal extraction. Genistin, nicotiflorin and myricetin-3-galactoside were first reported in pomegranate peel. This study provides a solid foundation for purposeful extraction of phenolics from pomegranate peels for industry.
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