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Requirements for Chromium Reactors for Use in the Determination of H Isotopes in Compound-Specific Stable Isotope Analysis of Chlorinated Compounds.
Analytical Chemistry ( IF 7.4 ) Pub Date : 2020-01-16 , DOI: 10.1021/acs.analchem.9b04737
Tetyana Gilevska 1 , Ann Sullivan Ojeda 1 , Julian Renpenning 2 , Steffen Kümmel 2 , Matthias Gehre 2 , Ivonne Nijenhuis 2 , Barbara Sherwood Lollar 1
Affiliation  

There is a strong need for careful quality control in hydrogen compound-specific stable isotope analysis (CSIA) of halogenated compounds. This arises in part due to the lack of universal design of the chromium (Cr) reactors. In this study, factors that optimize the critical performance parameter, linearity, for the Cr reduction method for hydrogen isotope analysis were identified and evaluated. These include the effects of short and long vertically mounted reactors and temperature profiles on trapping of Cl to ensure accurate and precise hydrogen isotope measurements. This paper demonstrates the critical parameters that need consideration to optimize any Cr reactor applications to ensure the accuracy of δ2H analysis for organic compounds and to enhance intercomparability for both international standards and reference materials run by continuous flow versus an elemental analyzer.

中文翻译:

氯化物化合物特定化合物稳定同位素分析中用于测定H同位素的铬反应器的要求。

在卤化化合物的氢化合物特定的稳定同位素分析(CSIA)中,非常需要仔细的质量控制。之所以出现这种情况,部分原因是缺乏铬(Cr)反应器的通用设计。在这项研究中,确定并评估了用于氢同位素分析的Cr还原方法的优化关键性能参数,线性的因素。这些包括短期和长期垂直安装的反应堆以及温度分布对捕集Cl的影响,以确保进行准确准确的氢同位素测量。
更新日期:2020-01-17
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