本文利用微波消解处理样品，采用 ICP - MS 法测定茶叶及其浸泡液中稀土的含量。通过实验对消解条件及 ICP - MS 测定条件进行优化选择。检测限为：0．0011～0．0037ng/mL ，测定下限：0．0043～0．012ng/mL ，回收率：96％～103％；RSD ：1．4％～4．4％。茶叶浸泡2h 后溶液中稀土总量已经达到平衡，浸泡液中稀土总量远低于茶叶中稀土总量。%In this paper ,the sample was dissolved using microwave digestion ,determination of total content of rare earth in tea and its soaking solution by inductively coupled plasma mass spectrometry .The detection limit was 0 .0011ng/mL-0 .0037ng/mL ,the quantification limit was 0 .0043ng/mL-0 .012ng/mL ;the recovery was 96% - 103% and RSD was 1 .4% -4 .4% .After the tea soaked 2h ,the total content of rare earth in the solution reached equilibrium ,which was far less than the tea .
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