【摘要】 本文用电感耦合等离子体质谱法测定了人体血浆中的稀土元素。在优化的条件下 ,以内标法测得的各种纯水溶液的检测限在 0 .7(Eu)～ 5 .4(Gd) ng·L- 1范围内。研究了 K,Na,Ca,Fe等基体元素对稀土测定的影响。以 In为内标元素补偿样品基体效应以及灵敏度飘移。比较了直接稀释、HNO3- H2 O2 消解及 HNO3-HCl O4消解 3种样品处理方法 ,用 1% HNO3直接稀释样品可满足轻稀土元素的定量分析要求 ,方法的定量测定下限≤ 1μg·L- 1。更多还原

【Abstract】 Inductively coupled plasma mass spectrometry ( I CP-MS),a highly sensitive inorgnic analytic technique,fits to determine ultra- trace rare-earth elements in human plasma.Under the optimized conditions detect ion limits for 15 rare-earth elements are in the range of 0.7 (for Eu)—5.4 ( for Gd) ng·L- -1.Indium as an internal standard element is used to compen sate for matrix suppression effect and sensitivity drift.Three kinds of preparat ion methods,diluted with 1% HNO 3,digested with HNO 3-H 2O 2 and with HNO 3-HClO 4,are checked and compared,and the former is the simplest way to be mea sured.The samples diluted with 1% HNO 3,stored in 4℃,are very steady for 16 d ays.With the method,11 healthy plasma samples in Changchun area of China are ana lysed.更多还原