茶叶水中重金属铅、铜、锌、锰的浸出率试验研究  

Extraction rate test study on heavy metal of Pb,Cu,Zn,Mn in tea

作　　者：周亶[1] 蒋东云[1] 崔林影[1] 

机构地区：[1]桂林电子科技大学电子工程学院,桂林541004

出　　处：《食品科技》2010年第1期285-288,共4页Food Science and Technology

基　　金：广西科学研究与技术开发计划项目(0592007-4)

摘　　要：以毛尖、普洱茶叶为研究对象,模拟实际生活中泡茶方式,考察了浸泡次数、浸泡时间、浸泡水温3种不同浸泡方式对铜、锌、锰金属元素浸出率的影响,采用火焰原子吸收光谱法检测茶叶中的重金属含量。结果表明:2种茶叶中Pb含量很小,低于检出限,Cu、Zn、Mn的含量未超标,但是Mn含量高,毛尖、普洱茶叶Mn含量分别为696.0mg/kg和659.4mg/kg;浸泡时间为30min、浸泡水温为90℃时,第一次浸泡的茶水中铜、锌、锰的浸出率最高。With the study of Maojian and Pu＇er in this article, Through the simulation of the manners of making tea in the real life, examine the influence of leaching rate of copper, zinc, manganese metal element in different steeping numbers, steeping times and steeping temperatures. Heavy metal contents in tea are detected with the methods of FAAS. According to the test results, lead Pb contents in two types of tea is little and below the detection limit range. The contents of Cu, Zn, Mn in two types of tea have not exceeded the standard content, but the contents of Mn are 696.0 mg/kg and 659.4 mg/kg in two types of tea. The leaching rates of copper, zinc, manganese are the highest in the first extracts tea when soaking time is 30 min and soaking water at temperature of 90 ℃.

关 键 词：茶叶 茶水 重金属 火焰原子吸收光谱法 

分 类 号：TS207.5[轻工技术与工程—食品科学]