Abstract
High purity water is now required in many industries. Ion exchange resins are the best means for obtaining such water. The present study was carried out to obtain the profiles of leachables from typical strong acid cation exchange resins (SAGER, three gel and two porous types) widely used for the production of highly pure water. These resins in the H form and fully cleaned were put in purified water which had been purged with nitrogen gas for a hundred days at 50°C. The amounts of organic compounds that could be leached from the SACERs were 4.2 × 10-2 to 1.7 Cmg/h per dried resin of liter wet resin as total organic carbon. The leachables from SACERs had similar gel filtration chromatograms and the amounts of components was different from those of the others. The high molecular weight (M, W.) leachables ranged from several hundred thousand by assuming them as polystyrene sulfonate, Phenolsulfonic acid and p-sulfobenzoic acid were found to be present in low M. W, leachable components by reverse phase chromatography.
