On-Line Analysis of Hydrogen Isotopes With Thermal Conductivity Detector

On-line analysis of hydrogen isotopes with thermal conductivity detector(TCD) using H₂ carrier gas was experimentally studied. Moreover, the influence of the sample gas pressure，deuterium concentration and HD content on measured results was investigated and discussed．The experimental results show that a good linear relation between TCD response to the partial pressure of deuterium is obtained. Various H₂-D₂ mixtures with 1%-90% deuterium concentration were used to verify this method. The error between measured value and theoretical value is in direct proportion to the HD content. The absolute error range is 0.000-0.025. 