Accurate and precise in situ determination of beryllium contents in beryllium minerals using ablation spot size of 13 μm by LA–ICP–MS

IF 3.4 2区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Wen-Kai Jin , Xu-Dong Che , Ru-Cheng Wang , Huan Hu , Can Rao , Wen-Lan Zhang , Xiao-Feng Li
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Abstract

Beryllium is a strategically critical metal, and its accurate in situ analysis in beryllium minerals is challenging in the field of earth science. High spatial resolution is also a difficult point in the analysis. A new analysis approach for the accurate and precise determination of beryllium contents in beryl using an ablation spot size of 13 μm by LA–ICP–MS was first achieved in this study. The control variables were used to optimise the instrument conditions and determine the laser ablation parameters suitable for determining beryl under an ablation spot size of 13 μm. The energy density was set at 5.5 J/cm2 with a repetition rate of 4 Hz, and the ablation time was 50 s. A new concept, the Relative Fractionation Index (RFI), was proposed to measure fractionation and matrix effects. Two potential beryl reference substances (B4–2 and Brl-3) were also assessed by determining their homogeneity to further improve the measurement accuracy. Other common beryllium minerals, including phenakite, chrysoberyl, and herderite, were identified in this study. By comparing the RFI values of different minerals and reference materials, appropriate reference materials and determination conditions were selected, and ideal analysis results were obtained. Therefore, the accurate and precise determination of beryllium contents in common beryllium minerals was achieved using an ablation spot size of 13 μm by LA–ICP–MS.

通过 LA-ICP-MS 利用 13 μm 的烧蚀光斑原位精确测定铍矿物中的铍含量
铍是一种具有重要战略意义的金属,在地球科学领域,对铍矿物进行准确的原位分析具有挑战性。高空间分辨率也是分析中的一个难点。本研究首次采用了一种新的分析方法,即利用烧蚀光斑尺寸为 13 μm 的 LA-ICP-MS 精确测定绿柱石中的铍含量。控制变量用于优化仪器条件,并确定适合在 13 μm 的烧蚀光斑尺寸下测定绿柱石的激光烧蚀参数。能量密度设定为 5.5 J/cm2,重复频率为 4 Hz,烧蚀时间为 50 秒。此外,还对两种潜在的绿柱石参考物质(B4-2 和 Brl-3)进行了评估,确定了它们的均匀性,以进一步提高测量精度。本研究还确定了其他常见的铍矿物,包括辉石、金绿柱石和牧草石。通过比较不同矿物和参考材料的 RFI 值,选择了合适的参考材料和测定条件,获得了理想的分析结果。因此,LA-ICP-MS 在烧蚀光斑尺寸为 13 μm 的条件下,可以准确、精确地测定常见铍矿物中的铍含量。
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来源期刊
Journal of Geochemical Exploration
Journal of Geochemical Exploration 地学-地球化学与地球物理
CiteScore
7.40
自引率
7.70%
发文量
148
审稿时长
8.1 months
期刊介绍: Journal of Geochemical Exploration is mostly dedicated to publication of original studies in exploration and environmental geochemistry and related topics. Contributions considered of prevalent interest for the journal include researches based on the application of innovative methods to: define the genesis and the evolution of mineral deposits including transfer of elements in large-scale mineralized areas. analyze complex systems at the boundaries between bio-geochemistry, metal transport and mineral accumulation. evaluate effects of historical mining activities on the surface environment. trace pollutant sources and define their fate and transport models in the near-surface and surface environments involving solid, fluid and aerial matrices. assess and quantify natural and technogenic radioactivity in the environment. determine geochemical anomalies and set baseline reference values using compositional data analysis, multivariate statistics and geo-spatial analysis. assess the impacts of anthropogenic contamination on ecosystems and human health at local and regional scale to prioritize and classify risks through deterministic and stochastic approaches. Papers dedicated to the presentation of newly developed methods in analytical geochemistry to be applied in the field or in laboratory are also within the topics of interest for the journal.
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