电感耦合等离子体质谱法（ICP-MS）同时测定家禽饮用水中18种金属元素

摘要

目的：建立用电感耦合等离子体质谱(inductively coupled plasma-mass spectrometry, ICP-MS)法同时测定家禽饮用水中铜、银、锌、镉、汞、铬、钼、锰、铁、钴、镍、锶、钡、铝、铅、砷、锑、硒的方法。方法采集的水样经0.45μm滤膜过滤后,直接采用电感耦合等离子体质谱法测定家禽饮用水中18种金属元素。结果本方法测定18种金属元素的线性范围宽,线性相关系数良好(R>0.999),检出限低,精密度(RSD≤2.6%),各元素的加标回收率均在82.0%~103.0%之间。结论本方法重复性好、无复杂前处理步骤、检测速度快,适用于家禽饮用水中18种金属元素的同时测定。%Objective To establish a method for simultaneous determination of Cu, Ag, Zn, Cd, Hg, Cr, Mo, Mn, Fe, Co, Ni, Sr, Ba, Al, Pb, As, Sb, and Se in poultry drinking water by inductively coupled plas-ma-mass spectrometry (ICP-MS). Methods The collected water samples were purified by 0.45 μm mem-brane filters. Then 18 metal elements in poultry drinking water could be determined simultaneously by ICP-MS. Results This method had a wild linear range of calibration curve for determination of 18 metal elements and the linear correlation coefficients were more than 0.999. The detection limits were low and the relative standard deviations (RSD) were not more than 2.6%.The recoveries for the spiked samples ranged from 82.0% to 103.0%. Conclusion This method has many advantages, such as good repeatability, without complex pretreatment steps, fast testing velocity and it can be applied to the simultaneous determination of 18 metal elements in poultry drinking water.