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ID-TIMS 准确测定国际关键比对大米粉中痕量镉

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王军, 赵墨田, 逯海. 2005: ID-TIMS 准确测定国际关键比对大米粉中痕量镉, 质谱学报, 26(z1): 1-2. doi: 10.3969/j.issn.1004-2997.2005.z1.001
引用本文: 王军, 赵墨田, 逯海. 2005: ID-TIMS 准确测定国际关键比对大米粉中痕量镉, 质谱学报, 26(z1): 1-2. doi: 10.3969/j.issn.1004-2997.2005.z1.001
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WANG Jun, ZHAO Mo-tian, LU Hai. 2005: Accurate Determination of Trace Amount of Cadmium in Rice for International Key Comparison by Isotope Dilution Thermal Ionization Mass Spectrometry, Journal of Chinese Mass Spectrometry Society, 26(z1): 1-2. doi: 10.3969/j.issn.1004-2997.2005.z1.001
Citation: WANG Jun, ZHAO Mo-tian, LU Hai. 2005: Accurate Determination of Trace Amount of Cadmium in Rice for International Key Comparison by Isotope Dilution Thermal Ionization Mass Spectrometry, Journal of Chinese Mass Spectrometry Society, 26(z1): 1-2. doi: 10.3969/j.issn.1004-2997.2005.z1.001
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ID-TIMS 准确测定国际关键比对大米粉中痕量镉

  • 国家标准物质研究中心,北京,100013

Accurate Determination of Trace Amount of Cadmium in Rice for International Key Comparison by Isotope Dilution Thermal Ionization Mass Spectrometry

  • 摘要: The method of isotope dilution thermal ionization mass spectrometry able to trace to SI was developed to accurately measure trace amount of cadmium in the rice powder sample from CCQM-K24 international key comparison organized by CCQM(Comité Consultatif pour la Quantité de Matière, Paris). By comparison with our previous work, there was much improvement in aspects of digestion of the rice powder sample, separation of cadmium from the sample and dry-mass correction. As a result, the blank of this procedure was reduced and the measurement precisions of isotopic ratios of cadmium were increased. In addition, the uncertainty evaluation of the entire process of measurement was profoundly studied. The analytical result of this work (14.53±0.15) nmol/g was in agreement with the certified value.
    Abstract: The method of isotope dilution thermal ionization mass spectrometry able to trace to SI was developed to accurately measure trace amount of cadmium in the rice powder sample from CCQM-K24 international key comparison organized by CCQM(Comité Consultatif pour la Quantité de Matière, Paris). By comparison with our previous work, there was much improvement in aspects of digestion of the rice powder sample, separation of cadmium from the sample and dry-mass correction. As a result, the blank of this procedure was reduced and the measurement precisions of isotopic ratios of cadmium were increased. In addition, the uncertainty evaluation of the entire process of measurement was profoundly studied. The analytical result of this work (14.53±0.15) nmol/g was in agreement with the certified value.
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  • 刊出日期:  2005-12-30

ID-TIMS 准确测定国际关键比对大米粉中痕量镉

  • 国家标准物质研究中心,北京,100013

摘要: The method of isotope dilution thermal ionization mass spectrometry able to trace to SI was developed to accurately measure trace amount of cadmium in the rice powder sample from CCQM-K24 international key comparison organized by CCQM(Comité Consultatif pour la Quantité de Matière, Paris). By comparison with our previous work, there was much improvement in aspects of digestion of the rice powder sample, separation of cadmium from the sample and dry-mass correction. As a result, the blank of this procedure was reduced and the measurement precisions of isotopic ratios of cadmium were increased. In addition, the uncertainty evaluation of the entire process of measurement was profoundly studied. The analytical result of this work (14.53±0.15) nmol/g was in agreement with the certified value.

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