浸泡时间对云南凤庆茶叶中金属元素溶出影响分析  

Analysis on Dissolving of Metal Elements in Yunnan Fengqing Tea by Immersion Time

作　　者：段晓艳[1] 陆敏连 朱芬德 杨冲[1] 杨婉秋[1] 

机构地区：[1]昆明学院化学科学与技术系,云南昆明650214

出　　处：《昆明学院学报》2016年第6期34-37,共4页Journal of Kunming University

基　　金：昆明学院应用型人才培养改革创新资助项目"化学化工类大学生创新实践基地建设"

摘　　要：应用ICP-MS法对云南省凤庆县所产的绿茶、红茶、普洱生茶、普洱熟茶及其不同浸泡时间的浸出液中10种金属元素(As,Cd,Co,Cr,Cu,Fe,Ni,Pb,Sr和Zn)进行分析,研究不同浸泡时间下,金属元素的浸出规律.结果表明,不同品种茶叶中各金属元素含量差异明显,含量高低顺序为:w(Fe)>w(Zn)>w(Cu)>w(Sr)>w(Ni)>w(Pb)>w(Cr)>w(Co)>w(As)>w(Cd).不同浸泡时间所得浸出液中,As和Cd均未检出,Co,Fe,Ni和Sr的质量浓度与浸泡时间呈正相关,Cu含量与浸泡时间呈负相关,Cr,Pb和Zn这3种元素与浸泡时间无明显相关性.The contents of ten metal elements（As, Cd, Co, Cr, Cu, Fe, Ni, Pb, Sr and Zn） in black tea, green tea, Pu-er raw tea, Pu-er ripe tea from Yunnan Fengqing county and their infusions were analyzed by ICP-MS to study the leaching characteristic of metal el-ements under different immersion time. The results showed that the contents of metal elements in different varieties of tea were different, and the order of content was ： w（ Fe）〉w（Zn）〉w（ Cu）〉 w（Sr）〉 Ni）〉Pb）〉w（Cr）〉w（Co）〉 w（As）〉 Cd） . The con-tent of As and Cd did not reach the detection limit in the infusions. The contents of Co, Fe, Ni and Sr were positively while the Cu con-tent was negatively correlated with the soaking time. There was no significant correlation between the content of Cr, Pb and Zn and the immersion time.

关 键 词：凤庆县 茶 浸出 金属兀素 ICP-MS 

分 类 号：TS272.7[农业科学—茶叶生产加工]