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无内标-多外标校正激光剥蚀等离子体质谱法测定磁铁矿微量元素组成
Determination of Trace Elements in Magnetite by Laser Ablation- Inductively Coupled Plasma-Mass Spectrometry Using Multiple External Standards without an Internal Standard Calibration

查看参考文献40篇

文摘 激光剥蚀电感耦合等离子体质谱(LA - ICP - MS)常用于磁铁矿原位微量元素分析,按照校正策略不同,主要分为内标法和无内标法。内标法需要用电子探针(EMPA)预先测定磁铁矿中内标元素Fe的含量,过程较繁琐,且待测元素含量会受到内标元素含量测定的影响。本文采用铁含量较高的玄武质玻璃BCR - 2G、BIR - 1G、BHVO - 2G和GSE - 1G作为外标,避免了内标元素含量的测定,建立了无内标-多外标校正LA - ICP - MS测定磁铁矿微量元素组成的分析方法。利用该方法测定了科马提岩玻璃GOR - 128g和自然岩浆磁铁矿BC 28的微量元素组成以评估方法的可靠性。结果表明,科马提岩玻璃的测定结果与推荐值及前人内标法的测定值一致,多数元素的相对标准偏差RSD < 5%;自然岩浆磁铁矿的测定结果与推荐值相比,多数元素的RSD < 7%,低于前人内标法的RSD(< 15%) 。由此说明无内标-多外标法可以实现富铁硅酸岩或磁铁矿微量元素含量的准确校正,克服了基体效应的影响。因此,无内标-多外标法是一种原位测定磁铁矿微量元素含量的快速、准确方法,具有一定的应用潜力。
其他语种文摘 Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) is commonly used to analyze trace elements in magnetite,which can be divided into internal standard (IS) and no internal standard (NIS) methods according to calibration techniques. IS method involves a relatively complex process for the determination of Fe content by Electron Microprobe. Moreover, elemental content are affected by the analytical accuracy of IS elemental iron. An analytical method for determination of trace elements in magnetite by LA-ICP-MS using multiple external standards (basaltic glasses BCR - 2G,BIR - 1G,BHVO -2G,GSE -1G) without an IS element has been developed. The proposed method avoids the determination of the IS element. Trace element compositions of komatitic glass (GOR - 128g) and natural magmatic magnetite (BC 28) were determined by the proposed method and used to evaluate the reliability of the method. Results show that the analytical values of komatitic glass are consistent with the certified values and reported values by the existing IS method. The relative standard deviation (RSD) of most elements is smaller than 5%. Most elements of natural magmatic magnetite have RSD better than 7% between the analytical values and the certified values,and RSD better than 15% between the analytical values and the reported values by the IS method. This indicates that multiple external standards without an IS method can determine accurate calibration of trace element concentrations of iron-rich silicates and magnetite,overcoming the matrix effects. Therefore,multiple external standards without an IS method is a fast and precise method for determination of trace elements in magnetite,which has a great application potential.
来源 岩矿测试 ,2016,35(6):585-594 【核心库】
DOI 10.15898/j.cnki.11-2131/td.2016.06.004
关键词 磁铁矿 ; 微量元素 ; 无内标-多外标 ; 激光剥蚀等离子体质谱法 ; 基体效应
地址

中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550081

语种 中文
文献类型 研究性论文
ISSN 0254-5357
学科 化学;地质学
基金 中国科学院地球化学研BHVO-2G所博士科研启动基金 ;  中国科学院“西部之光”计划之“西部青年学者”项目
文献收藏号 CSCD:5887273

参考文献 共 40 共2页

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引证文献 6 篇

1 段超 宁芜和尚桥铁氧化物-磷灰石矿床(IOA)成矿过程研究:来自磁铁矿LA-ICP-MS原位分析的证据 岩石学报,2017,33(11):3471-3483
被引 3 次

2 郝宇杰 LA-ICP-MS原位分析白钨矿稀土元素 吉林大学学报. 地球科学版,2020,50(4):1029-1041
被引 1 次

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论文科学数据集

1. 中国华南湖南省水口山和宝山花岗闪长岩地球化学数据集

2. 湖南井冲钴铜多金属矿床黄铁矿和黄铜矿的LA-ICP-MS数据

3. 西藏吉隆地区钠长花岗岩锡石和独居石U-Pb定年与全岩和矿物成分分析

数据来源：
国家青藏高原科学数据中心
PlumX Metrics
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