热导检测技术在线分析氢同位素气体

On-Line Analysis of Hydrogen Isotopes With Thermal Conductivity Detector

摘要: 以高纯氕作载气，对热导检测技术(TCD)在线分析氢同位素气体进行了实验研究，考察了进样压力、氘丰度以及样品中HD含量对测量结果的影响。实验结果表明，TCD对氘的响应与氘的压力呈良好的线性关系；对已知氘丰度为1%~90%的氕氘混合物样品进行了测定，测量结果的误差与氕氘混合气体中的HD丰度成正比，绝对误差范围在0.000~0.025。

Abstract: 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. 