用金属铬法分析微量水和有机质氢同位素组成

The Chromium Analytical Technique for Hydrogen Isotopes

本文介绍一种用金属铬作还原剂分析微量水和有机分子中氢同位素组成的技术方法。该分析方法是利用金属铬在高温条件下的还原性，将微量水和有机分子中的氢转变成H2气的分析技术。金属铬还原法的流程简单、安全可靠、操作便捷，其分析精密度可达±2‰。

The chromium reduction technique is an extremely simple and quantitative method for converting H in micro-water and in a variety of organic molecules into H2. The metal chromium has an advantage over U and Zn in that the hydrogen in micro-water samples and many hydrogen-bearing compounds can be reduced to H2. In this paper an analytical technique using chromium as a reducing matter is presented for the determination of the hydrogen isotope composition in micro-water samples and hydrogen-bearing compounds. The technological process of the chromium reduction method is simple, accurate （precision ＋ 2‰）, and rapid （10 minutes for each micro-water sample） for hydrogen isotope composition in micro-water samples and organic molecules. It can therefore be used in a wide variety of analytical fields, including hydrogen isotope analyses of micro-water samples and hydrogen-bearing organic molecules.