ICP-MS测定辐射环境监测样品中238U和232Th比活度实践

Monitoring of ²³⁸U and ²³²Th in radiation environmental samples including water and biota was requested by the related international and national safety guides and standards. Inductively coupled plasma mass spectrometry (ICP-MS) was applicable to determination of ²³⁸U, ²³²Th in such samples with a high sensitivity and working efficiency. Some practical aspects are presented.     

激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）测定锡石样品中微量元素

A method for determination of trace elements in cassiterite by 213 nm laser ablation inductively coupled plasma mass spectrometry with lithium tetraborate flux sample preparation procedure and in-situ focusing has been investigated. The relative deviations of measurement from flux sample preparation procedure and in-situ focusing are less 25% and 10%－120%, respectively.     

低温密封酸溶——高分辨电感耦合等离子体质谱法测定地质样品中50个微量元素的评价

The method based on the determination of trace elements in geological samples by sector high resolution inductively coupled plasma mass spectrometry with mixed acid digestion procedure has been evaluated. The evaluation show that the results of 29 elements including Li, Cr, Co, Ni, Cu, Zn, Ga, Rb, Y, Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Tl, Bi, Th and U are satisfactory; V, Sr, Nb, Mo, In, Sb, Ba and Pb are acceptable; Sc, Cd, Hf, Ti, Mn, Fe, Ge and Sn have of large deviations, Be, Ta, Zr, As and Se are worse.     

电感耦合等离子体质谱（ICP-MS）法测定微量元素时样品制备过程中的质量控制

Sample preparation is a key procedure for determiantion of trace elements in samples by inductively coupled plasma mass spectrometry. This paper gives some experiences on the quality control of sample preparation for determination of trace elements in samples by ICP-MS.     

高分辨电感耦合等离子体质谱法测定铀矿石浓缩物中的微量元素

A method for determination of trace elements in uranium ore concentrates by high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) was developed. Results obained by the method can be used to identify origins, processing characteristics and quality of uranium ore concentrates. The sample was dissolved by 2% nitric acid and prepared to matrix concentration of 1 g·L－1, followed by the measurement of HR-ICP-MS with on-line internal standard technique. The contents of multi trace elements from 7Li to 232Th have been determined, giving about 16% of relative deviation over certified reference material. The method has been validated using certified reference material.