Whitty-Léveillé Laurence, Turgeon Keven, Bazin Claude, Larivière Dominic
Département de génie des mines, de la métallurgie et des matériaux, Université Laval, Québec, QC, Canada; Département de chimie, Université Laval, Québec, QC, Canada.
Département de génie des mines, de la métallurgie et des matériaux, Université Laval, Québec, QC, Canada.
Anal Chim Acta. 2017 Apr 8;961:33-41. doi: 10.1016/j.aca.2017.01.045. Epub 2017 Jan 31.
The recent commercialisation of inductively coupled plasma tandem mass spectrometric (ICP-MS/MS) instruments has provided analytical chemists with a new tool to properly quantify atomic composition in a variety of matrices with minimal sample preparation. In this article, we report on our assessment of the compatibility of 3 sample preparation techniques (open-vessel acid digestion, microwave digestion and alkaline fusion) for the quantification of rare earth elements (REEs) in mineral matrices. The combination of the high digestion temperatures (1050 °C) and using LiBO as a flux was the most effective strategy for the digestion of all rare earth elements in mineral matrices and was compatible with ICP-MS/MS measurements. We also assessed the analytical performances of ICP-MS/MS against other plasma-based instrumentation (microwave induced plasma and inductively coupled plasma atomic emission spectroscopy (MIP-AES and ICP-AES, respectively) and single quadrupole inductively coupled plasma mass spectrometry (ICP-MS). The comparative study showed that the concentrations obtained by ICP-MS/MS are in excellent agreement with the certified reference material values, and much more suited than the other analytical techniques tested for the quantification of REEs, which exhibited low detectability and/or spectral interferences for some elements/isotopes. Finally, the ruggedness of the analytical protocol proposed which combines a rapid sample dissolution step performed by an automated fusion unit and an ICP-MS/MS as a detector was established using various certified mineral matrices containing variable levels of REEs.
电感耦合等离子体串联质谱仪（ICP-MS/MS）的商业化，为分析化学家提供了一种新工具，能在最少样品制备的情况下，准确量化各种基质中的原子组成。在本文中，我们报告了对三种样品制备技术（敞口容器酸消解、微波消解和碱熔）用于定量分析矿物基质中稀土元素（REE）兼容性的评估。高温消解温度（1050°C）与使用LiBO作为助熔剂相结合，是消解矿物基质中所有稀土元素的最有效策略，并且与ICP-MS/MS测量兼容。我们还评估了ICP-MS/MS相对于其他基于等离子体的仪器（分别为微波诱导等离子体和电感耦合等离子体原子发射光谱仪（MIP-AES和ICP-AES）以及单四极杆电感耦合等离子体质谱仪（ICP-MS））的分析性能。对比研究表明，ICP-MS/MS获得的浓度与认证参考物质的值高度吻合，并且比测试的其他分析技术更适合用于定量分析REE，因为其他技术对某些元素/同位素表现出低检测限和/或光谱干扰。最后，使用各种含有不同水平REE的认证矿物基质，确立了所提出的分析方案的耐用性，该方案结合了由自动熔合装置执行的快速样品溶解步骤和作为检测器的ICP-MS/MS。
