【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。更多还原

【Abstract】 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.更多还原