激光剥蚀电感耦合等离子体质谱测定岩石样品中稀土元素

罗彦; 刘勇胜; 胡圣虹; 高山

激光剥蚀电感耦合等离子体质谱测定岩石样品中稀土元素

罗彦¹,
刘勇胜¹,
胡圣虹¹,
高山^{1, 2}

1.
国土资源部壳幔体系组成、物质交换及动力学开放研究实验室, 湖北武汉 430074
2.
西北大学地质系, 陕西西安 710069

基金项目:

国家重点基础研究发展规划项目 G1999043202

国家自然科学基金项目 49973026

国家自然科学基金项目 40003004

详细信息

作者简介:
罗彦(1975-), 女, 现于中国地质大学(武汉)攻读地球化学博士学位

中图分类号: P59
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出版历程
- 收稿日期: 2000-11-13
- 刊出日期: 2001-09-25

RARE EARTH ELEMENTS ANALYSIS OF GEOLOGICAL SAMPLES BY LA-ICP-MS

1.
Open Laboratory of Constitution, Interaction and Dynamics of the Crust-Mantle System, the Ministry of Land and Resources, Wuhan 430074, China
2.
Department of Geology, Northwest University, Xi' an 710069, China

摘要

摘要: 以NIST612玻璃标准为外标校正物质, 采用⁴²Ca为内标校正灵敏度漂移、基体效应、剥蚀效率及进样量的变化.将LSX-2 0 0激光剥蚀进样系统与POEMSIII电感耦合等离子体质谱仪联用, 对国际标准物质BCR-2 (玄武岩) 及国内标准物质GSR-11 (花岗岩) 玻璃熔饼进行了稀土元素的测定, 建立了LA -ICP -MS整体分析岩石样品中稀土元素的方法.结果表明, 绝大多数稀土元素准确度优于15 %, 测定精度(RSD) 小于10 %.稀土元素的检出限(LOD) 在21.4×10^-9~23 1.6×10^-9之间, 样品分析速度为2 0样品/h.在Excel软件下用VBA语言编制宏, 实现了脱机数据处理的自动化, 极大提高了工作效率.
- 激光剥蚀电感耦合等离子体质谱 /
- 岩石样品测定 /
- 稀土元素 /
- 数据处理
Abstract: This paper describes recent work in applying a laser ablation system (LSX-200) hyphenated with POEMSIII inductively coupled plasma mass spectrometry (LA-ICP-MS) for the in situ analysis of solid geological materials. It demonstrates the potential of LA-ICP-MS for the determination of geochemically important trace and ulra-trace elements (REE for instance) following XRF routine sample preparation. NIST SRM 612 was employed as external calibration standard and Ca as internal standard to correct for signal drift, difference in transport efficiency and sampling yield.Resultsagree well with the certified value with accuracy better than 15%, RSD less than 15% for most determined rare earth elements. LOD from 21.4×10^-9 to 231.6×10^-9 and less than 100×10^-9 for majority trace elements determined. In addition, Home-made macro function by VBA language under Excel software greatly enhanced off-line data reduction efficiency.
- laser ablation inductively coupled plasma mass spectrometry /
- analysis of rock samples /
- rare earth elements /
- data reduction

HTML全文

图 1 LA-ICP-MS结构示意

Fig. 1. LA-ICP-MS schematics

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图 2 岩石样品稀土元素球粒陨石归一化曲线

Fig. 2. Chondrite normalized REE curves of rock sample

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表 1 LA-ICP-MS的工作参数

Table 1. Operation parameters for LA-ICP-MS

表 2 熔饼样品分析结果

Table 2. Results of fused rock samples

表 3 LA-ICP-MS测定稀土元素的检出限

Table 3. Limits of detection for REEs by LA-ICP-MS

参考文献(6)

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[2]	Perkins W T, Pearce N J G, Jeffries T E. Laser ablation inductively coupled plasma mass spectrometry: a new technique for the determination of trace and ultra-trace elements in silicates[J]. Geochim Cosmochim Acta, 1993, (57): 475-482.
[3]	Fedorowich J S, Richards J P, Jain J C, et al. A rapid method for REE and trace-element analysis using laser sampling ICP-MS on direct fusion whole-rock glasses[J]. Chemical Geology, 1993, 106: 229-249. doi: 10.1016/0009-2541(93)90029-I
[4]	Oedegaerd M, Dundas S H, Grimstvedt B, et al. Application of a double-focusing magnetic sector inductively coupled plasma mass spectrometer with laser ablation for the bulk analysis of rare earth elements in rocks fused with Li2B4O7[J]. Fresenius' Journal of Analytical Chemistry, 1998, 362(5): 477-482. doi: 10.1007/s002160051110
[5]	Norman M D, Pearson N J, Sharma A, et al. Quantitative analysis of trace element in geological materials by laser ablation ICPMS: instrumental operating conditions and calibration values of NIST glass[J]. J Geostand Newsletter, 1996, 20(2): 247-261. doi: 10.1111/j.1751-908X.1996.tb00186.x
[6]	Longerich H P, Gǜnther D, Jackson S E. Elemental fractionation in laser ablation inductively coupled plasma mass spectrometry[J]. Fresenius' Journal of Analytical Chemistry, 1996, 355: 538-542.