ICP-MS测定新类型沉积稀土矿中关键稀土元素方法研究

Determination of Rare Earth Elements in a New Type of Sedimentary Rare Earth Ore by ICP-MS

这是一篇矿物分析领域的论文。近年来我国地质科研人员在滇、黔地区发现了一种新型沉积型稀土矿,它既不同于氟碳铈矿和独居石矿,也不同南方离子型稀土矿,而是赋存于黏土岩中一种独特的稀土矿。本文通过对滇黔相邻区的不同矿点,不同品位的两个稀土样品的溶矿方法进行对比研究,并详细研究了关键稀土元素(Pr、Nd、Tb、Dy)配分、仪器参数的优化及关键稀土元素测定方法的准确度和精密度。结果表明采用密闭消解四酸溶矿体系为该新型沉积稀土矿的较佳溶矿方式,而ICP-MS为准确、高效的测定方法,并具有良好的精密度和准确度。

This is an essay in the field of mineral analysis.In recent years,Chinese geological researchers have discovered a new type of sedimentary rare earth ore in Yunnan and Guizhou regions,which is not only different from bastnaesite and monazite,but also different from ionic rare earth ore in south of China,but a unique rare earth ore in clay rocks.In this paper,the ore dissolution methods of two rare earth samples with different grade from different mineral sites in adjacent areas of Yunnan and Guizhou are compared,and the distribution of key rare earth elements(Pr、Nd、Tb、Dy),the optimization of instrument parameters and the accuracy and precision of the determination method of key rare earth elements are studied in detail.The results show that the closed digestion system is the best method for the new deposit of rare earth ore,and ICP-MS is an accurate and efficient determination method with good precision and accuracy.