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Determination of urinary tin by inductively coupled plasma mass spectromety



Determination of urinary tin by inductively coupled plasma mass spectromety



Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 35(10): 782-784



目的: 建立电感耦合等离子体质谱(ICP-MS)测定尿中锡的检测方法。 方法: 使用质谱调谐液优化仪器参数,选用(118)锡为测定同位素,有效避开谱线干扰,标准(STD)模式直接测定;采用质量数、电离能相近的铟(In)为内标元素,在线加入内标,校正信号漂移及基体干扰。尿样用1%硝酸溶液稀释10倍后直接进样。 结果: 该方法测定的线性范围为0.025~20.0 μg/L,相关系数为0.999 9,回归方程为y=0.146x+0.014;方法检出限为0.025μg/L,定量下限为0.084 μg/L,最低检出浓度为0.25μg/L;加标回收率为96.60%~97.90%,批内精密度为1.40%~2.43%,批间精密度为1.52%~4.43%。 结论: 该方法灵敏度高、前处理简便、检测快速、结果准确稳定,适用于尿中锡的检测。.

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Accession: 057801331

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