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EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对碳、氮同位素测定的影响

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王旭, 张福松, 丁仲礼. 2005: EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对碳、氮同位素测定的影响, 质谱学报, 26(z1): 41-42. doi: 10.3969/j.issn.1004-2997.2005.z1.021
引用本文: 王旭, 张福松, 丁仲礼. 2005: EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对碳、氮同位素测定的影响, 质谱学报, 26(z1): 41-42. doi: 10.3969/j.issn.1004-2997.2005.z1.021
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WANG Xu, ZHANG Fu-song, DING Zhong-li. 2005: Changes of the Combustion Transformation Capability for EA-Conflo-IRMS and Their Impacts on Carbon and Nitrogen Isotope Ratio Measurement, Journal of Chinese Mass Spectrometry Society, 26(z1): 41-42. doi: 10.3969/j.issn.1004-2997.2005.z1.021
Citation: WANG Xu, ZHANG Fu-song, DING Zhong-li. 2005: Changes of the Combustion Transformation Capability for EA-Conflo-IRMS and Their Impacts on Carbon and Nitrogen Isotope Ratio Measurement, Journal of Chinese Mass Spectrometry Society, 26(z1): 41-42. doi: 10.3969/j.issn.1004-2997.2005.z1.021
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EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对碳、氮同位素测定的影响

  • 中国科学院地质与地球物理研究所环境同位素实验室,北京,100029

Changes of the Combustion Transformation Capability for EA-Conflo-IRMS and Their Impacts on Carbon and Nitrogen Isotope Ratio Measurement

  • 摘要: Changes were demonstrated which were in combustion transformation capability (CTC) of EA-Conflo-IRMS with measuring time and the relationship of measured carbon and nitrogen isotope ratios with their CTC. Although the CTC generally decreases with measuring time, the CTC displayed no or only a little variation during short period (one day or several day) and marked decrease in CTC occurr only when most Cu in reduction tube were oxidized and the oxidative ability of upper part of combustion tube declined. Moreover, the measured carbon and nitrogen isotope ratios tended to reduce with the declined CTC despite there were some complicated changes in the measured isotope ratios due to the influences of other factors. In order to obtain more precise measurement, a reversed calibration should be performed periodically on the CO2 and N2 reference gases by some standard samples to give out the properly normalized δ-values.
    Abstract: Changes were demonstrated which were in combustion transformation capability (CTC) of EA-Conflo-IRMS with measuring time and the relationship of measured carbon and nitrogen isotope ratios with their CTC. Although the CTC generally decreases with measuring time, the CTC displayed no or only a little variation during short period (one day or several day) and marked decrease in CTC occurr only when most Cu in reduction tube were oxidized and the oxidative ability of upper part of combustion tube declined. Moreover, the measured carbon and nitrogen isotope ratios tended to reduce with the declined CTC despite there were some complicated changes in the measured isotope ratios due to the influences of other factors. In order to obtain more precise measurement, a reversed calibration should be performed periodically on the CO2 and N2 reference gases by some standard samples to give out the properly normalized δ-values.
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  • 刊出日期:  2005-12-30

EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对碳、氮同位素测定的影响

  • 中国科学院地质与地球物理研究所环境同位素实验室,北京,100029

摘要: Changes were demonstrated which were in combustion transformation capability (CTC) of EA-Conflo-IRMS with measuring time and the relationship of measured carbon and nitrogen isotope ratios with their CTC. Although the CTC generally decreases with measuring time, the CTC displayed no or only a little variation during short period (one day or several day) and marked decrease in CTC occurr only when most Cu in reduction tube were oxidized and the oxidative ability of upper part of combustion tube declined. Moreover, the measured carbon and nitrogen isotope ratios tended to reduce with the declined CTC despite there were some complicated changes in the measured isotope ratios due to the influences of other factors. In order to obtain more precise measurement, a reversed calibration should be performed periodically on the CO2 and N2 reference gases by some standard samples to give out the properly normalized δ-values.

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