微波消解ICP-MS法测定根和根茎类生药中11种微量元素

Investigating the Distribution of 11 Kinds of Trace Elements in Root-Like and Rootstalk-Like Dried Medicinal Herbs by Using Microwave Digestion-ICP-MS

建立了微波消解技术ICP-MS法测定了根及根茎类生药中的铬、锰、镍、钴、铜、锌、砷、硒、钼、镉和铅11种微量元素的方法。对同时适用于两类生药的各微量元素分析的前处理方法进行了研究，从消解体系、酸用量、消解程序等几方面对微波消解条件进行了优化，为同类生药的消解提供了参考。方法检出限为0．001-0．260μg·g^-1,相对标准偏差为0．4％～3．1％，回收率为90％-110％。

A method was studied for the analysis of 11 kinds of trace elements（Cr, Mn, Ni, Co, Cu, Zn, As, Se, Mo, CA and Pb） in root-like and rootstalk-like dried medicinal herbs by microwave digestion-ICP-MS. A digestion method was developed for trace elements analysis for two types of herbs. The Microwave digestion condition was optimized in terms of digestion system, proportion of acids, and digestion procedure, which affords reference to the preparation of the same kinds of dried medicinal herbs. The detection limits of the method for all sample elements were in the range of 0. 001-0. 260 μg· g^-1, the RSDs were between 0. 4%-3.1% and the recoveries were between 90% and 110%.