Unibeads series consists of spherical porous silica beads with different characteristics. Unibeads 1S, 2S and 3S are spherical silica beads with pores size of 25 Å, 70 Å, 100 Å. Unipak S is a spherical shape silica based beads useful for analysis of ethane, ethylene, acetylene, and also higher carbon number hydrocarbon gases by programmed temperature analysis.