Radioassay of Folacin in Foodstuffs

Abstract

A commercial radioassay kit for folate (Radio-chemical Centre Amersham, England), produced for clinical analysis, has been tested for folacin assay in foodstufls. The binding capaciv of porcine binder was determined for diperent folates and compounds interfering with the microbiological assay. Recovery of standard addition of N5-methyltetrahydrofolate to the foodstufs extracts estimated by radioassay varied from 96 to 105%.