Determination of Stable Hydrogen Isotopes by Chromium High Temperature Conversion Isotope Ratio Mass Spectrometry
By the chemical reaction of Cr at high temperature,the fractionation effect of hydrogen isotope was reduced,and hydrogen element was converted into hydrogen gas as much as possible,thus accurate hydro-gen isotope ratios were obtained.The filling material of the original method was replaced with chromium particles and corundum spheres(the new method).The method had good linearity(R2=0.999 5)in simultane-ously determining stable hydrogen isotope reference materials of three kinds of solid and three kinds of water sam-ples.The hydrogen isotope measurements of solid samples could be directly associated with the internationally recognized water standard material VSMOW-SLAP scale.The results by the original and new methods for the de-termination of chemicals containing impurities,hair and tea samples were different,but those of polyethylene without impurities were both accurate.
Stable hydrogen isotopeIsotopic mass spectrometryChromiumConversion at high tempera-tureWater quality
万方数据
维普
