ICP-AES法测定大米中的金属元素

Determination of Metal Elements in Rice by Using ICP-AES

目的研究粮食中金属元素的种类及含量．方法样品湿法消化后应用电感耦合等离子体发射光谱法（ICP-AES）同时测定粮食中的多种金属元素．结果检出限为（0．04～1．21）×10^-4，加标回收率为92．0％-111．9％，RSD为0．4％～3．8％．结论ICP—AES法测得大米中含有多种金属元素，其中K，Mg，Ca，Zn，Mn，Fe元素含量较为丰富．

Objective To research the contents and species of metal elements in the rice. Methods Waterish digestion and ICP-AES were used to determine the metal elements in the rice. Results Detection lines is （0.04 1. 21 ） × 10^-4, and its recovery ratio obtained by standard addition method ranged between 92.0% and 111.9% ,while RSD is 0.4% - 3.8% . Conclusion There are kinds of metallic elements in the rice by using ICP-AES, the contents of K, Mg, Ca, Zn, Mn, Fe are very abundant.