Abstract: Anew model porous polymer bead based on methyl-acrylate ester-styrene copolymer used as stationary phase for water analysis by GC is presented.Separation and quantitative analysis of water in various organic compounds and inorganic gases were studied. It has been proved that these new products have a lot of better chromatographic behaviors than widely used porous polymer beads such as Chromosorb, Porapak and home made GDX series etc..