[Determination of cobalt and tungsten in human urine by inductively coupled plasma mass spectrometry].

Objective: To establish a inductively coupled plasma mass spectrometry method for the determination of trace cobalt and tungsten in human urine. Methods: The authors used 1% nitric acid solution as diluent in October-December 2021, the sample dilution factor and internal standard element were optimized by single factor rotation experiment, and the difference between the working curve and the standard curve was compared. Results: The method uses working curve to determine cobalt and tungsten in urine, the linear range of this method was 0.0~10.0 μg/L, the correlation coefficient was 0.999 9, the detection limits respectively were 0.005 μg/L (cobalt) and 0.09 μg/L (tungsten), the recoveries of samples respectively were 87.0%~100.2% (cobalt) and 89.4%~104.8% (tungsten), the relative standard deviations respectively were 0.4%~4.4% (cobalt) and 0.6%~3.8% (tungsten) . Conclusion: A simple and rapid method for determination of cobalt and tungsten in urine has been established. This method has the advantages of simple operation, high sensitivity, low detection limit and good stability. It is suitable for determination of cobalt and tungsten in urine of all kinds of people.目的： 建立电感耦合等离子体质谱法测定尿液中钴和钨的方法。 方法： 于2021年10月至12月，利用1%硝酸为稀释剂，使用电感耦合等离子体质谱法测定尿液中钴和钨，本次研究利用控制单因素变量实验的方法优化选择样品稀释倍数和内标元素，并比较测定工作曲线与标准曲线间的差异。 结果： 该方法利用工作曲线同时测定尿液中的钴和钨含量，线性范围为0.0~10.0 μg/L，相关系数为0.999 9，尿钴和钨检出限分别为0.005 μg/L和0.09 μg/L，样品加标回收率分别为87.0%~100.2%和89.4%~104.8%，相对标准偏差分别为0.4%~4.4%和0.6%~3.8%。 结论： 本方法建立了一种简便快捷的测定尿液中钴和钨的方法，该法操作简单、灵敏度高、检出限低、稳定性好，适合各类人群中尿中钴和钨的测定。.