Analysis of Hydrogen Deuterium Components by Micro Gas Chromatography

KeyWord:hydrogen deuterium components  fuel cycle  micro gas chromatography

Abstract:

      A micro gas chromatography was established for the quantitative analysis of hydrogen and deuterium components in fusion reactor fuel cycle system£®An alumina column£¨4¡«6 m ¡Á 0.53 mm£© was modified with MnCl2 solution£®Effects of concentration of modified liquid£¬length of column and flow rate of carrier gas on the analysis of H/D components were studied£®The mixture of H2£¬HD and D2 were separated at LN2 cryogenic temperature£¨77 K£©£®The results indicated that the column treated with 19% MnCl2 solution was better than that treated with 15% MnCl2 solution for the separation of hydrogen isotopes£®The longer the column length£¬the better the separation effect of H2 and HD. Under the experimental conditions£¬H2 and HD components could be completely separated when the column length was longer than 5 m£¬and the peak resolution between H2 and HD was larger than 1.5£¬resulting in the effective separation of the hydrogen isotope£®Furthermore£¬the minimum values of HETP for HD and D2 were 0.013 cm and 0.016 cm in the experiment£¬respectively£®As for the three hydrogen isotopes in He£¬there were good linear relationships for the three components in the concentrations range of 0%£­10%£¬with their correlation coefficients not less than 0.993 and the detection limits£¨LODs£© of 600.1£¬343.8£¬654.5 ¦ÌL/L for H2£¬HD and D2£¬respectively£®The peak area relative standard deviations£¨RSDs£© were in the range of 0.34%£­1.5%£®The method is a rapid£¬accurate and applicable analysis method for hydrogen isotope£¬which is expected to be applied to the analysis of hydrogen isotope gases in the D/T fuel cycle system of fusion reactor£®