This paper reviewed the mechanism of purification by polyamide chromatography and the development of applying in flavonoids of plants and tea polyphenols of tea and anthraquinone and noble metal.
综述了聚酰胺的层析分离作用机理，以及在黄酮类物质、多酚、以及贵金属分离提取中的应用现状。
Green tea contains between 30 and 40 per cent of water-extractable polyphenols, while black tea (green tea that has been oxidized by fermentation) contains between 3 and 10 per cent.
绿茶含有30%——40%的可以水萃取的茶多酚，而红茶(绿茶经过发酵后的产物)只含有3%——10%。
However, there is a huge gap between the perception that tea consumption is healthy and the actual amount of the healthful nutrients - polyphenols - found in bottled tea beverages.
李世明 （Shiming Li）教授说，他就胡池塘（Chi-tang ho)教授和他同事们的研究做了汇报，“喝茶是健康的这种看法与瓶装茶饮料中健康元素——茶多酚的真实含量之间存在巨大差距。
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