摘要
目的建立生活饮用水中16种稀土元素的电感耦合等离子体质谱(ICP-MS)快速测定法,并测定水样中上述16种元素的含量。方法采集北京市生活饮用水水样,以雾化器流速为0.90 L/min,辅助气流速为1.40 L/min,射频发生器功率为1 300 W,等离子气体流速为15.0 L/min,用ICP-MS法快速测定样品中钪、钇、镧、铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥16种稀土元素。结果 16种稀土元素在0μg/L^1.00μg/L内线性良好,相关系数除钪元素外其他元素均大于0.999,检出限为0.004μg/L^0.050μg/L,各元素在低、中和高3个浓度水平加标回收率为84.3%~109.2%,相对标准偏差为1.2%~9.4%。在检测的40份水样中,检出钪、钇、镧、铈、钕、钐、铕7种元素检出外,其余9种元素测定结果均低于检出限。结论本方法操作简单快速、灵敏度高,可用于生活饮用水中多种稀土元素同时测定。
Objective To establish a new rapid method for the determination of 16 rare earth elements（scandium, yttrium, lan- thanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thuli- um, ytterbium and lutetium） in drinking water by inductively coupled plasma mass spectrometry（ ICP -MS）. Methods To col- lect the drinking water samples in Beijing, with atomizer velocity of 0.90 L/min, auxiliary gas flow rate of 1.40 L/min, RF generator power of 1 300 W, the plasma gas flow rate of 15.0 L/min; the concentration of 16 elements were determined by ICP - MS. Results Good linearity was obtained when the concentrations of 16 elements were within 0 μg/L - 1.00 μg/L, with the correlation coefficient of each element higher than 0. 999 except scandium. The detection limit was within 0. 004 μg/L - 0. 050 μg/L; the recoveries were within 84.3% -109.2% , and the relative standard deviation was within 1.2% -9.4%. In the detection of 40 samples, scandium, yttrium, lanthanum, cerium, neodymium, samarium, europium were detected in 40 wa- ter samples, while the other 9 elements were lower than the detection limit. Conclusion This method is of simple operation, high sensitivity, which can be used for the determination of muti - rare earth elements in drinking water.
出处
《中国卫生检验杂志》
CAS
2017年第12期1693-1695,1699,共4页
Chinese Journal of Health Laboratory Technology
关键词
生活饮用水
稀土元素
电感耦合等离子体质谱.
Drinking water
Rare earth elements
Inductively coupled plasma mass spectrometry
