Microwave Digestion,ICP-oa TOF-MS Method for the Determination of Ten Elements in Teas

[Objective]To investigate pre-treatment by hermetic microwave digestion and feasibility of determination 10 elements in tea by using ICP-oa TOF-MS. [Method] A method was used to determination 10 elementss in tea by using ICP-oa TOF-MS after microwave digestion with nitrate- hydrogen peroxide,which was validated from the linearity,accuracy,precision and recovery rate. [Result] Results showed that 10 elements metal the requirements of real sample detection,with linear r 0. 999 5,RSD 4%,and recoveries 94. 00%- 103. 05%. [Conclusion]Compared with other methods,this method is a simple rapid determination multiple elements from tea samples and accurate high sensitivity. Especially for some low concentration of ng / L of the components of the level of trace detection.