The objective of this study is to evaluate the possible role of Chinese tea as a natrural inhibitor of N-nitrosation,and......

茶叶用沸水(1:10)提取10 min,过滤并冷冻干燥(Ⅰ);另将茶水用氯仿、乙酸乙酯先后提取浓缩,并与残水一起分别冷冻干燥,得组分Ⅱ、Ⅲ......

采用紫外-可见光谱法和气质联用色谱法对鱼腥草中有效化学成分（黄酮类化合物、抗坏血酸（VC）、多酚、多糖、甲基正壬酮）进行测定,并研究......