茶叶中10种重金属浸出率  

Leaching Rates of Ten Heavy Metals in Tea

作　　者：杨钦沾 陈孟君 温恒 罗汉金[2] 

机构地区：[1]广东省惠州市农产品质量安全监督检测中心,广东惠州516008 [2]华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006

出　　处：《福建农业学报》2015年第4期406-410,共5页Fujian Journal of Agricultural Sciences

基　　金：国家自然科学基金项目(40973074)

摘　　要：用电感耦合等离子体原子发射光谱仪(ICP-AES)分析茶叶在不同的浸泡条件下茶汤中的Cd、Cr、Cu、Fe、Ni、Pb、Ti、Co、Mn、Zn等10种重金属溶出规律。试验结果表明,选择合适的浸泡条件对重金属的摄入控制在最小范围内具有重要作用。同时探明了不同茶叶中同种重金属元素和同种茶叶中各重金属元素在3种不同浸泡方式的浸出率变化与茶叶中重金属的来源途径有关,重金属的污染来源于土壤,则比较难浸出,重金属的污染由大气沉降或者加工过程中引入,则比较易浸出。With ICP-AES method, heavy metals in tea infusion, including Cd, Cr, Cu, Fe, Ni, Pb, Ti, Co, Mn and Zn, were detected under different tea soaking conditions. The results showed that suitable conditions of soaking tea could effectively control heavy metal intake within minimum range. Leaching rates of heavy metals were compared between different tea kinds with same soaking conditions or among three soaking conditions for same tea. Results showed that the leaching rates of heavy metals in tea were related to the source of heavy metals. Heavy metals in tea originated from the soil were difficult to leach, whereas heavy metals originated from atmospheric precipitation or introduced during the machining process were easier to leach.

关 键 词：茶叶 茶汤 重金属 浸出率 来源 

分 类 号：TS207[轻工技术与工程—食品科学]