摘要
目的建立水源水中16种稀土元素的电感耦合等离子体质谱(ICP-MS)检测方法。方法观察酸度对响应值的影响,用混合调谐液优化仪器工作条件,选用铟作为内标元素校正基体干扰和漂移,确立水源水中的稀土元素ICP-MS检测方法 ,并采集水样,测定其中的16种稀土元素含量。结果在优化实验条件下,16种稀土元素的质量浓度在0.0~100.0μg/L范围内,方法的回归方程线性关系良好,标准曲线相关系数(r)>0.999 7;方法检出限为0.004~0.048μg/L;添加高、中、低3个水平的稀土元素标准溶液测定方法的回收率,结果显示,平均回收率为90.0%~110.0%,相对标准偏差为0.7%~4.8%。10份水样中全部检出钪(Sc),含量为1.48~4.33μg/L,5份水样中检出钇(Y),含量为0.026~0.071μg/L,6份水样中检出铕(Eu),含量为0.012~0.042μg/L。结论 ICPM S方法灵敏度高、准确度好、检出限低、线性范围宽,适用于水源水中稀土元素的测定。
Objective To develop a method for the determination of 16 rare earth elements in source water with in- ductively coupled plasma-mass spectrometry （ICP-MS）. Methods The method for the determination of rare earth ele- ments was established. Effect of acidity on response value was tested and the conditions of instrument operation were op- timized with mixed tune solution. Indium was chosen as the internal standard, which was used to correct matrix interfer- ence and signal drift. Sixteen rare earth elements in source water were detected with ICP-MS. Results Under the opti- mized conditions, the linearity of the regression equations for the detections was good and the correlation coefficients of standard curves were all above 0. 999 7 when the concentrations of 16 rare earth elements were within 0. 0 - 100. 0 μg/L. De- tection linits of the method were within 0. 004 μg/L - 0. 048 μg/L. Recoveries of the method were tested by adding standard solutions of the rare earth elements at high, moderate and low dosage. The average recoveries and the relative standard derivations of the method were within 90.0% - 110.0% and 0. 7% -4. 8%. For the 10 source water samples measured, scandium （Sc） within the concerntration range of 1.48 - 4. 33 μg/L, yttrium （Y） of 0. 026 - 0. 071 μg/L, and europium （Eu） of 0. 012 -0. 042 μg/L were detected in all,5 and 6 samples. Conclusion The established method is of high sensitivity, good accuracy, low detection limit, and wide linear range and is suitable for the determination of rare earth elements in source water.
出处
《中国公共卫生》
CAS
CSCD
北大核心
2017年第12期1785-1787,共3页
Chinese Journal of Public Health
