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RP-HPLC和MALDI-TOF质谱技术研究茶多酚锰的组成、结构及稳定性
Authors
翁鹭娜
蒙伟能
黄河宁
黄河清
Publication date
15 January 2008
Publisher
Abstract
选用C18色谱柱对茶多酚锰的组分进行RP-HPLC分离,并用MALDI-TOF质谱技术鉴定其组成与分子结构.用弱酸性介质(pH3.0)作为分离条件,可明显改善茶多酚锰色谱分离的分离度,但却使表没食子儿茶素没食子酸酯-Mn(EGCG-Mn)分解成表没食子儿茶素-Mn(EGC-Mn)和没食子酸(棓酸)-Mn(GA-Mn),说明EGCG-Mn化合物对弱酸体系呈现出不稳定特性.当分离介质的酸度降低到pH4.0时,EGCG-Mn金属有机化合物表现出分子结构的稳定性.实验结果表明:在恰当的酸性介质条件下,建立的茶多酚锰分离技术,可获得质谱纯多酚化合物
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Last time updated on 16/06/2016