RESOlution激光剥蚀系统在微量元素原位微区分析中的应用
Application of RESOlution in-situ laser ablation ICP-MS in trace element analyses
查看参考文献17篇
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文摘
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采用美国Resonetics公司生产的RESOlution M-50激光剥蚀系统和Agilent 7500a型的ICP-MS联机,对7个不同岩性的地质样品经过熔融制备的MPI-DING玻璃标样的37种微量元素进行了分析.RESOlution M-50激光剥蚀系统包括一个193 nm ArF准分子(excimer)激光器,一个双室(two-volume cell)样品室,一个平滑激光剥蚀脉冲的Squid系统和电脑控制高精度X-Y样品台移动,定位系统.双室样品室的好处是降低样品交叉污染,减少样品室吹洗所需时间.平滑激光剥蚀脉冲的Squid系统可以降低因激光脉冲带来的统计误差.样品定位系统的定位精度优于0.1μm.本次实验使用的激光束斑直径为31μm和69μm.分析结果表明,对于用地质样品制备的MPI-DING玻璃标样,微量元素分析的相对标准偏差RSD一般优于5%,分析值与不同参考值之间的相对偏差(RD)一般优于10%,少数RSD和RD较大的元素主要出现在含量很低或不均匀样品中.稀土元素的RSD和RD均优于5%.本研究证明,RESOlution M-50激光剥蚀系统与Agilent 7500a型ICP-MS联机,可准确测定从超基性岩到酸性岩的不同类型地质样品的微量元素,其新式的双室样品室和平滑Squid系统对于测定含量在0.1μg/g以上的元素具有更好的分析精度和准确度 |
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其他语种文摘
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In this study,an Agilent 7500a ICP-MS coupled with a Resonetics RESOlution M-50 laser-ablation system was used to analyze 37 trace elements for 7 MPI-DING glass standards. RESOlution M-50 laser-ablation system consists of an excimer(193 nm) laser,a two-volume laser-ablation cell,a Squid smoothing device and a computer controlled high precision X-Y stage. The two-volume laser-ablation cell is designed to avoid cross contamination and reduce background flushing time. The Squid smoothing device can reduce statistic error induced by laser-ablation pulses. The accuracy of the X-Y stage is better than 0.1 μm.Two spot sizes, with diameters of 31 and 69 μm respectively, were applied. The relative standard deviations(RSDs) are mostly less than 5%, and relative deviations(RDs) of obtained average concentrations from reference values are mostly less than 10%, only a few elements have high RSD due to very low concentrations and/or heterogeneities. RSDs and RDs for rare earth element(REE) results are all better than 5%. This study demonstrates that an Agilent 7500a ICP-MS coupled with a RESOlution M-50 laser-ablation system can precisely determine trace element concentrations of geological samples ranging from ultramafic to granitic. The precision and accuracy for elements with concentrations higher than 0.1 μg/g, are better than other common laser ablation system, because of the two-volume laser-ablation cell and signal smoothing Squid device |
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来源
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地球化学
,2011,40(1):83-98 【核心库】
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关键词
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RESOlution M-50
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双室样品室
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Squid信号平滑装置
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激光剥蚀
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电感耦合等离子体质谱仪
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MPI-DING glass
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地址
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中国科学院广州地球化学研究所, 中国科学院同位素年代学和地球化学重点实验室, 广东, 广州, 510640
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中国科学院广州地球化学研究所, 中国科学院成矿动力学重点实验室, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:4153061
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