CAJ | 학술논문

分别采用微波、超声和溶剂回流三种方法对普洱茶样品中的三种儿茶素进行提取，并结合高效液相色谱进行定量分析，结果表明：微波提取法高效、快捷，表没食子儿茶素（E GC ）、表儿茶素（EC）和表没食子儿茶素没食子酸酯（EGCG）三种儿茶素的含量分别为2.13％、2.94％和7.26％．扫描电镜图进一步证实：微波提取使茶叶样品表观结构明显侵蚀，并呈现出花纹状，这有利于分析物的提取．
분별채용미파、초성화용제회류삼충방법대보이다양품중적삼충인다소진행제취，병결합고효액상색보진행정량분석，결과표명：미파제취법고효、쾌첩，표몰식자인다소（E GC ）、표인다소（EC）화표몰식자인다소몰식자산지（EGCG）삼충인다소적함량분별위2.13％、2.94％화7.26％．소묘전경도진일보증실：미파제취사다협양품표관결구명현침식，병정현출화문상，저유리우분석물적제취．
The extraction of three catechins of epigallocatechin (EGC),epicatechin (EC)and epigallocatechin gallate (EGCG)in Pu’er tea is investigated by the methods of microwave assisted extraction,ultrasonic extrac-tion and solvent reflux extraction,respectively.The three catechins are then determined by high performance liq-uid chromatography.The results indicate that microwave assisted extraction method is faster and more efficient. The contents of EGC,EC and EGCG are 2.1 3%,2.94% and 7.26%,respectively.It is thereafter confirmed by the scanning electron micrographs that the tea sample surface structure is apparently corroded after microwave assisted extraction.The visible pattern structure is conducive to the extraction of analytes.