Sample preparation device for quantitative hydrogen isotope analysis using chromium metal
Sample preparation device for quantitative hydrogen isotope analysis using chromium metal
复制标题
DOI：
10.1021/ac9606766
复制
发表时间：
1996-12-15
影响因子：
7.4
通讯作者：
Strauch, G
中科院分区：
文献类型：
--
作者：
Gehre, M;Hoefling, R;Strauch, G
本文介绍了一种直接与同位素比质谱仪（IRMS）联用测定D/H的样品制备新技术。该方法适用于淡水和盐水沃茨中不同有机化合物（气态或液态）的制备。注入1微升水或氢当量，并在专门设计的反应炉中通过金属铬还原，然后氢气直接流入IRMS，通过标准/样品比较进行分析。通过对IAEA标准沃茨VSMOW、GISP和SNOW的分析，证实了该方法的准确性。包括液体食品样品以及甲烷气体在内的所有水溶液样品都作为原始化合物注入，并在没有任何准备的情况下直接测量。
A new technique for the sample preparation, directly coupled to an isotope ratio mass spectrometer (IRMS) for D/H determination, is described, The method is suitable for the preparation of fresh and saline waters as web as different organic compounds (gaseous or liquid). One microliter of water or hydrogen equivalent is injected and reduced by means of chromium metal in a specially designed reaction furnace, and then the hydrogen gas flows directly into the IRMS to be analyzed by standard/sample comparison. The reproducibility is about 1 parts per thousand, The accuracy of this method is confirmed by analysis of IAEA standard waters VSMOW, GISP, and SLAP. All aqueous samples including liquid food samples as well as methane gas were injected as original compounds and directly measured without any preparation.