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  • Title: Radioisotope dilution determination of vitamin B12 in dietary supplements.
    Author: Osterdahl BG, Johansson E.
    Journal: Int J Vitam Nutr Res; 1988; 58(3):300-2. PubMed ID: 3058619.
    Abstract:
    A rapid and sensitive method for the determination of vitamin B12 in dietary supplements has been developed using a commercially available radioisotope dilution (RID) kit. The vitamin B12 was isolated by enzymatic extraction.
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