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CN105659354B 测量同位素比的方法 有权

测量同位素比的方法
摘要：
在同位素比光谱仪中测量连续样品的同位素比。在测量时间段内测量至少一个样品同位素比并且在所述测量时间段的至少一部分内测量样品浓度基于测量的样品浓度为所述光谱仪选择参考气体浓度用于对在所述测量时间段期间测量的样品作参考。在光谱仪中在选择的参考气体浓度下测量参考气体的同位素比。使用在对应的参考气体浓度下测量的参考气体的同位素比校准在测量时间段期间测量的样品的至少一个同位素比，并且确定多个校准的同位素比和多个样品气体浓度测量，每个维持不同时间。
摘要（英）：

An isotope ratio of a continuous sample is measured in an isotope ratio spectrometer. At least one sample isotope ratio is measured over a measurement time period tns, (n≧1) and a sample concentration cns is measured over at least a part of the measurement time period tns. A reference gas concentration cnref for the spectrometer is selected for reference to the sample measured during the measurement time period tns, on the basis of the measured sample concentration cnref. An isotope ratio of the reference gas is measured at the selected reference gas concentration cnref in the spectrometer. The at least one isotope ratio of the sample measured during the measurement time period tns is calibrated using the measured isotope ratio of the reference gas at the corresponding reference gas concentration cnref and a plurality of calibrated isotope ratios and a plurality of sample gas concentration measurements are determined, each being for a different time.

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