微波消解-等离子体原子发射光谱法测定6种蒙药中15个元素含量

Microwave digestion ICP-AES determination of fifteen elements in six Mongolian drug

目的:建立电感耦合等离子体原子发射光谱法测定6种清热解毒类蒙药中钼、钴、硒、硅、锰、铜、锡、钡、铁、磷、锌、钾、钠、镁和钙等15个元素含量的方法。方法:采用硝酸-过氧化氢(体积比5∶1)为溶样试剂,以微波消解和电感耦合等离子体原子发射光谱法(ICP-AES)联用同时测定上述15个元素。结果:在0.5 g蒙药中各元素的平均回收率在96.4%→104.5%之间,RSD在1.1%→3.5%之间,检出限介于0.18～102.41μg.L-1。结论:该方法简便、迅速、准确,适用于蒙药中上述15个元素的同时测定。

Objective： To establish a method for simultaneously determining fifteen element contents （Mo, Co, Se, Si, Mn, Cu, Sn, Ba, Fe, P, Zn, K, Na, Mg and Ca） in six Mongolian drug. Methods： Microwave digestion procedure was applied with HNO3 -H2O2 （5：1v/v） mixed acid for digesting Mongolian drug. Element concentra- tions were determined by ICP - AES. Results： The results showed that the average recoveries all analytical elements were from 96. 4% to 104. 5% with RSD below 5% under optimum experiment condition. Conclusion： The method is simple, rapid and accurate, and suitable for simultaneous determination of above- mentioned 15 elements in Mongolian drug.