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Li₂B₄O₇熔融玻璃-激光剥蚀等离子体质谱法测定水系沉积物国家标准定值样品中微量元素

Determination of Trace Elements in National Reference Stream Sediment Samples by Laser Ablation-Inductively Coupled Plasma Mass Spectrometry with Li₂B₄O₇ Fusion Glass Sample Preparation

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【Author】 JIANG Jin-feng1,XU Hong-zhi2,GUO Wei1,LIU Xiao-ming3,HU Sheng-hong1(1.State Key Laboratory of Geo-processing and Mineral Resources,China University of Geosciences,Wuhan 430074,China;2.Analysis and Testing Center,Shandong University of Technology,Zibo 255049,China;3.State Key Laboratory of Continental Dynamics,Northwest University,Xi′an 710069,China)

【机构】中国地质大学(武汉)地质过程与矿产资源国家重点实验室；山东理工大学分析测试中心；西北大学大陆动力学国家重点实验室；中国地质大学(武汉)地质过程与矿产资源国家重点实验室湖北武汉430074；山东淄博255049；湖北武汉430074；陕西西安710069；

【摘要】建立了激光剥蚀等离子体质谱法直接测定Li2B4O7熔融玻璃中微量元素的分析方法。详细讨论了内标元素的选择及Li2B4O7熔融玻璃的均一性、背景空白对分析测定的影响。以Li2B4O7熔融玻璃中低同位素丰度的6Li作内标,水系沉积物国家标准参考物质熔融玻璃建立多元素标准校正曲线,用于标准参考物质及水系沉积物定值样品的分析,测定值与标准值或溶液雾化等离子体质谱结果比较,具有较好的一致性。更多还原

【Abstract】 A direct determination of trace elements in stream sediment samples by laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) with Li2B4O7 fusion glass sample preparation was developed.The low abundance isotope of lithium(6Li) in the flux was selected as internal standard.The effects of homogenization of fusion glasses and the flux blank on the analytical signals were discussed.Multi-standard calibration was used with fusion stream sediment reference glasses to quantify the trace elements in sediment samples.The proposed method has been applied to the direct analysis of trace elements in National Standard Reference Materials and stream sediment samples.The analytical results are in good agreement with certified values and those from conventional ICPMS determinations.更多还原