| 多接收器等离子体质谱(MC-ICPMS)高精度测定Nd同位素方法 |
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| 关键词:MC-ICPMS Nd isotopic ratios fractionation correction |
| 基金项目:国家自然科学基金重点项目(编号:40331005); 国家自然科学基金面上项目(编号:40473039) |
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| Precise Measurement of Nd Isotopic Ratios by Means of Multi-collector Magnetic Sector Inductively Coupled Plasma Mass Spectrometry |
| The authors have developed a technique for precise determination of Nd isotopic ratios by multi-collector magnetic sector inductively coupled plasma mass spectrometry(MC-ICPMS).Based on a study of characteristics of mass fractionation coefficients,the authors have realized MC-ICPMS mass fractionation normalization by correcting fractionation coefficients.The precision and accuracy of measurements made on reference standard materials of La Jolla,JMC Nd_2O_3 and samples demonstrate that they are at the same level as that of measurements by thermal ionization mass spectrometry(TIMS).The repeatability of 143Nd/144Nd ratio measurements in the authors' laboratory standard CAGS-Nd-1 is 143Nd/144Nd=0.512072±0.000008(2σ,n=140).It is thus concluded that the technique of Nd isotope measurement by MC-ICPMS can be widely used. |
| HE Xue-xian,TANG Suo-han,ZHU Xiang-kun,WANG Jin-hui.2007.Precise Measurement of Nd Isotopic Ratios by Means of Multi-collector Magnetic Sector Inductively Coupled Plasma Mass Spectrometry[J].Acta Geoscientica Sinica,28(4):405-410. |
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