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. (authors)