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《Geochimica》 2011-01
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Application of RESOlution in-situ laser ablation ICP-MS in trace element analyses

TU Xiang-lin1,ZHANG Hong1,2,DENG Wen-feng1,LING Ming-xing1,2,LIANG Hua-ying3,LIU Ying1 and SUN Wei-dong1 1.Key Laboratory of Isotope Geochronology and Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China;3.Key Laboratory for Metallogenic Dynamics,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China  
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.
【Fund】: 国家自然科学基金(40525010)
【CateGory Index】: P595
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