WO9425394-A1  "Application of SAES and HWT gas purifiers for the removal of impurities from heliumhydrogen gas mixtures" by H. Albrecht, U. Kuhnes and W. Asel published in the Journal of Less-Common Metals, Vol. 172-174 (1991) pp. 1157-1167;  "Removal of nitrogen and methane from hydrogen by metal getters" by H. Heimbach, H.R. Ihle and C.H. Wu, published in the Proceedings of the 13th Symposium on Fusion Technology (SOFT), Varese, September 24-28, 1984, pp. 421-426;  "Removal of simple hydrocarbons from a rare gas by a 70% - 25% V - 5% Fe getter" by M.A. George, J.H. Kiefer and J.P. Hessler published in Gas Separation and Purification, 1989, Vol. 3, pp. 50-55;  "13th Symposium on Fusion Technology" September 1984, VARESE cited in the application page 421 - page 426;  JOURNAL OF THE LESS COMMON METALS 1991, NETHERLANDS pages 1157 - 1167 H.ALBRECHT ET AL. "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures";  '13th Symposium on Fusion Technology' September 1984 , VARESE cited in the application see page 421 - page 426;  JOURNAL OF THE LESS COMMON METALS 1991 , NETHERLANDS pages 1157 - 1167 H.ALBRECHT ET AL. 'Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures' cited in the application;  See also references of EP 0696256A1;  See also references of EPA 0696256US5556603-A  "13th Symposium of Fusion Technology " Sep. 1984, VARESE cited in the application see p. 421-p. 426.;  Albrecht et al "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures," Journal of the less Common Metals ; 172-174, 1991; pp. 1157-1167.;  George et al., "Removal of simple hydrocarbons from a rare gas by a 70% Zr-25% V-5% Fe getter," Gas Separation & Purification, vol. 3, Jun. 1989; pp. 50-55.;  Heimbach et al., "Removal of Nitrogen and Methane from Hydrogen by Metal Getters"; EURATOM pp. 421-426.US5558844-A  Albrecht et al "Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures", Journal of the Less Common Metals, 172-174 (1991); pp. 1157-1167.;  George et al "Removal of simple hydrocarbons from a rare gas by a 70%ZR-25%V-5%Fe getter", Gas Separation & Purification, vol. 3, Jun. 1989; pp. 50-55.;  Heimbach et al "Removal of Nitrogen and Methane from Hydrogen by Metal Getters"; EURATOM pp. 421-426.EP696256-B1  '13th Symposium on Fusion Technology' September 1984 , VARESE cited in the application see page 421 - page 426;  JOURNAL OF THE LESS COMMON METALS 1991 , NETHERLANDS pages 1157 - 1167 H.ALBRECHT ET AL. 'Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures' cited in the application