ICP-MS测定水中16种元素

Determination of 16 Elements in Water by Inductively Coupled Plasma-mass Spectrometry

建立电感耦合等离子体质谱法测定生活饮用水中16种元素的方法。以Sc、Ge、In、Bi做内标,采用电感耦合等离子体质谱法（ICP-MS）测定水中16元素,即钾、钠、钙、镁、铁、锰、铜、锌、铬、铅、镉、钡、钼、镍、铝、砷。对检出限、线性范围、精密度、加标回收等方法学指标进行了研究。测定结果表明,该方法的线性范围宽,线性相关系数（r）均大于0.999,各元素的相对标准偏差（RSD%）均小于5.0%,各元素的加标回收率均在87.6-119.0%之间。测定了GSBZ-5009-88,GSB07-1375-2001,GSBZ50019-90的标准参考物,测定值均在标准范围内。实验结果表明：该方法简便、快速、灵敏、准确,适用于饮用水、水源水中16种元素的同时测定。

To establish an analytical method for determining 16 metals in drinking water. Inductively coupled plasma-mass spectrometry （ICP-MS） was applied to determine 16 metals concluding K、Na、Ca、Mg、Fe、Mn、Cu、Zn、Cr、Pb、Cd、Ba、Mo、Ni、Al、As in drinking water by using Sc,Ge,In,Bi as an internal standard,carried on checking determine limit, line scope, precision and recovery of spiked sample to learn the research .The experimental results showed the linear correlative coefficient for all elements were higher than 0.999.Precision was fine,RSD was lower than 5.0% and recoveries of spiked samples were in range of 87.6～119.0%. And the results showed close agreement with the reference values in three standard reference materials of GSBZ5009-88, GSB07-1375-2001, and GSBZ50019-90. It indicated that the method was simple,rapid,sensitive and accurate,which could meet the demand for 16 elements analysis in drinking water at the same time.