天然資源よりビタミンB_<12>結晶の製造に関する研究 : (XI)カチオン交換体によるビタミンB_<12>の吸着

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Investigations on the adsorption power for vitamin B_<12> of several cation exchangers in the hydrogen form indicated that Amberlite IR-120 had weaker, while Amberlite IR-112 had stronger affinity to the vitamin than Amberlite IRC-50 generally used. On the other hand, carbonaceous ion exchanger, sulfonated coal, showed the highest capacity of the cation exchangers tested, being able to adsorb more than 10mg of vitamin B_<12> per 1g of the exchanger. The vitamin adsorbed on the exchanger could be almost quantitatively eluted with aqueous acetone solution containing NaCl. Carbonaceous ion exchanger could be used advantageously on an industrial scale for the purification of vitamin B_<12> from natural materials owing to its excellent adsorption and elution behaviors to vitamin B_<12>, and its low price corresponding to approximately 1/5 of those of cation exchange resins.
日本ビタミン学会の論文