Validation of Trace Element Analysis of Geological Materials by Single-Pulse Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)
Validation of Trace Element Analysis of Geological Materials by Single-Pulse Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)
复制标题
单脉冲激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS) 验证地质材料的痕量元素分析
DOI：
10.1080/00032719.2022.2077356
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发表时间：
2022
影响因子：
2
通讯作者：
Morishita Tomoaki
中科院分区：
文献类型：
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作者：
Sagawa Takuya;Tamura Akihiro;Okino Kyoko;Morishita Tomoaki
激光烧蚀-电感耦合等离子体质谱（LA-ICP-MS）是测定各种样品的元素和同位素组成的有力工具。LA-ICP-MS的缺点是它比其他类型的原位分析方法消耗更多的样品材料。为了将这种方法的应用扩展到痕量元素分析，我们对美国国家标准与技术研究所（SRM 610，612和614）和美国地质调查局（BCR-2G，BHVO-2G和BIR-1G）的参考物质进行了单脉冲LA-ICP-MS分析。通过与这些标准品的推荐浓度和使用相同系统通过常规分析获得的浓度进行比较，验证了测定浓度的准确度和单脉冲LA-ICP-MS分析的精密度。玻璃样品中分析元素的时间分辨曲线表明，背景校正强度在激光脉冲开始后立即达到峰值，然后逐渐下降。在每次分析期间，同位素比是稳定的，直到元素的背景校正强度达到峰值的5%。单脉冲LA-ICP-MS分析的相对标准偏差显著高于常规LA-ICP-MS分析。然而，除NIST SRM 614、NIST SRM 612、BCR-2G和BHVO-2G外，从参比物质获得的大多数测定浓度与推荐值在20%以内一致。此外，单脉冲LA-ICP-MS分析准确地再现了玄武岩标准玻璃的地球化学特征。单脉冲LA-ICP-MS法为地质样品中多种微量元素的测定提供了有效的方法。
Laser ablation–inductively coupled plasma – mass spectrometry (LA–ICP–MS) is a powerful tool for determining the elemental and isotopic compositions of various samples. The disadvantage of LA–ICP–MS is that it consumes more sample material than other types ofin situanalytical methods. To extend the application of this method to trace element analysis, we conducted single-pulse LA–ICP–MS analysis of the Reference Materials of the National Institute of Standards and Technology (SRM 610, 612, and 614) and the United States Geological Survey (BCR-2G, BHVO-2G, and BIR-1G). The accuracy of the determined concentrations and the precision of the single-pulse LA–ICP–MS analysis were verified by comparison with recommended concentrations for these standards and those obtained by conventional analysis with the same system. Time-resolved profiles of the analyzed elements in the glass samples show that the background-corrected intensity reaches a peak immediately after the start of the laser pulse and then gradually decreases. During each analysis, the isotope ratios are stable until the background-corrected intensity of the elements reaches 5% of the peak values. The relative standard deviation of the single-pulse LA–ICP–MS analyses is significantly higher than for conventional LA–ICP–MS analysis. However, most of the determined concentrations obtained from the reference materials except for NIST SRM614, NIST SRM612, BCR-2G, and BHVO-2G mostly agreed with the recommended values within 20%. In addition, the geochemical features of basaltic reference glasses were accurately reproduced by the single-pulse LA–ICP–MS analyses. In conclusion, the single-pulse LA–ICP–MS method provides usable results for the determination of multiple trace elements in geological materials.