| http://www.w3.org/ns/prov#value | - In case of recovering the water-soluble cationic resin in a form of solid, the obtained solution is added to a lower alkyl alcohol such as methanol, ethanol, propanol, or isopropanol to precipitate the resin because the resin is insoluble in these solvents, and thereafter the precipitated resin is filtered and washed with the above alcohol.
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