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目的建立电感耦合等离子体质谱(ICP-MS)法同时测定药食两用中药材中镁、铝、铬、锰、铁、钴、镍、铜、锌、砷、镉、钡、汞、铅和铀15种元素的含量。方法以硝酸:盐酸(V:V=4:1)为消解试剂,采用微波消解法进行样品前处理,在线加入内标并开启碰撞反应池。对该方法的检出限、线性范围、精密度和回收率进行考察,并对10种药食两用中药材中15种元素进行同时测定。结果 15种元素线性关系良好,相关系数均大于0.999,检出限为0.003~1.998 mg/kg,方法重复性相对偏差均小于19.1%,回收率在79.35%~112.96%范围之间。结论该方法快速、灵敏,可同时准确测定药食两用中药材中多元素。
Objective To establish an ICP-MS method for simultaneous determination of magnesium, aluminum, chromium, manganese, iron, cobalt, nickel, copper, zinc, arsenic, cadmium, barium, mercury and lead in traditional Chinese medicine Uranium content of 15 kinds of elements. Methods The nitric acid: hydrochloric acid (V: V = 4: 1) was used as digestion reagent, and the samples were pretreated by microwave digestion. The internal standard was added online and the collision reaction tank was opened. The detection limit, linear range, precision and recovery rate of this method were investigated. Fifteen elements of 10 kinds of traditional Chinese medicines were simultaneously determined. Results The linear relationships of the 15 elements were good with the correlation coefficients greater than 0.999 and the detection limits of 0.003-1.998 mg / kg. The relative repeatabilities of the methods were all less than 19.1%. The recoveries ranged from 79.35% to 112.96%. Conclusion The method is rapid and sensitive, and it can simultaneously and accurately determine the multi-elements in traditional Chinese medicine.