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目的建立电感耦合等离子体质谱仪(ICP-MS)快速测定血液透析水中镁、铝、铬、铜、锌、砷、镉、锡、钡、铅、钙、钾、硒、银、汞等15种元素含量的方法。方法采用ICP-MS法碰撞池技术(CCT),最大程度的减少了多原子干扰,通过在线加入Ge、In和Bi 3种元素内标液的方法校正由于基体效应和信号漂移对测量所造成的影响,样品直接酸化测定血液透析水中15种化学污染物的含量。结果 15种元素的检出限范围为0.009 ng/ml~0.165 ng/ml;标准曲线线性关系良好,r≥0.9990;相对标准偏差1.1%~5.2%,回收率80%~120%。该法比血液透析用水的现行标准中采用的方法检出限低,精密度高,线性范围宽,能够实现多元素同时分析。结论本方法较为简便、快速、准确,可用于血液透析水中15种元素的检测,为血液透析水的标准修订提供参考。
Objective To establish an ICP-MS method for the rapid determination of 15 kinds of magnesium, aluminum, chromium, copper, zinc, arsenic, cadmium, tin, barium, lead, calcium, potassium, selenium, silver and mercury in hemodialysis water Element content of the method. Methods Collision cell technology (CCT) was used in ICP-MS method to minimize polyatomic interference. The internal standard solution of Ge, In and Bi was added online to correct the influence of matrix effect and signal drift on the measurement. Influence, sample direct acidification determination of 15 kinds of chemical contaminants in hemodialysis water content. Results The detection limits of the 15 elements ranged from 0.009 ng / ml to 0.165 ng / ml. The calibration curve showed a good linear relationship with r ≥ 0.9990. The relative standard deviations ranged from 1.1% to 5.2%. The recoveries ranged from 80% to 120%. This method provides lower detection limits, higher precision, and wider linear range than the methods currently used in hemodialysis water, enabling simultaneous analysis of multiple elements. Conclusion The method is simple, rapid and accurate, which can be used for the determination of 15 elements in hemodialysis water and provide a reference for the standard revision of hemodialysis water.