摘要
目的建立同时测定生活饮用水中铍、硼、铝、钒、铬、锰、铁、钴、镍、锌、砷、锶、镉、银、钡、镧、铈、镨、钕、钐、铕、钆、镝、钬、铒、铥、镱、镥、铊、铅的电感耦合等离子体质谱法(ICP-MS)。方法在线加入6Li、45Sc、89Y、115In、159Tb、209Bi内标元素,校正干扰效应,采用电感耦合等离子体质谱法直接对生活饮用水中铍等30种元素进行测定。结果方法的检出限、定量限、线性范围、准确度及相关系数等各项指标均能满足实验要求,检出限为0.000 082 5μg/L^4.572μg/L,定量限为0.000 275μg/L^15.240μg/L,线性范围为0μg/L^500μg/L,质控样品的测定结果在证书要求的参考范围内,稀土元素的低、中、高3个浓度加标回收率分别为76.4%~107.3%、90.8%~105.6%、96.7%~107.8%,相关系数均>0.999 2。结论该方法简单、快速、准确、灵敏,可用于饮用水中多种元素的同时测定。
Objective To establish a method for the determination of 30 elements by inductively coupled plasma mass spectrometry(ICP-MS),including beryllium,boron,aluminum,vanadium,chromium,manganese,iron,cobalt,nickle,zinc,arsenic,strontium,cadmium,silver,barium,lanthanum,cerium,praseodymium,neodymium,samarium,europium,gadolinium,dysprosium,holmium,erbium,thulium,ytterbium,lutecium,thallium and lead. Methods After the internal standard elements ~6 Li,^(45)Sc,^(89)Y,^(115)In,^(159)Tb,^(209)Bi were online spiked to correct interference effect and the analytes(beryllium etc.)in drinking water sample were determined directly by ICP-MS. Results The detection limits,quantification limits,linear range,accuracy and correlation coefficient of the method can meet the experimental requirements. The detection limit of the method was within 0. 000 082 5 μg/L-4. 572 μg/L; the quantitation limit of the method was within 0. 000 275 μg/L-15. 240μg/L; the linear range was within 0 μg/L-500 μg/L; the measurement results of the quality controls were within the reference range. The recoveries of rare earth elements at low,medium and high spiked levels were within 76. 4%-107. 3%,90. 8%-105. 6%,and 96. 7%-107. 8%,respectively,with the correlative coefficient(r) 0. 999 2. Conclusion The method is simple,fast,accurate,sensitive and can be used in the simultaneous determination of multiple elements in drinking water.
作者
马爱英
刘卫东
MA Ai-ying;LIU Wei-dong(Haidian District Center for Disease Control and Prevention,Beijing 100094,China)
出处
《中国卫生检验杂志》
CAS
2018年第15期1821-1824,共4页
Chinese Journal of Health Laboratory Technology
关键词
电感耦合等离子体质谱法
生活饮用水
元素分析
Inductively coupled plasma - mass spectrometry
Drinking water
Element analysis