title: Comparison of radiometric and microbiological assays for the determination of folate in fortified gruel and porridge.
abstract: The results obtained by a radiometric assay of folate in fortified gruel and porridge, using a commercially available radioassay kit, were compared with those obtained by a standard microbiological assay with Lactobacillus casei. A lower level of folate was found with the radiometric assay. Comparison of the results obtained with the two methods gave a correlation coefficient of 0.991 when the analysis was performed on samples extracted at the same time. A lower correlation coefficient was obtained between the result if the extractions were carried out on different occasions. The radiometric assay is a acceptable method for the routine determination of folate in fortified gruel and porridge.
authors.affiliation: Swedish National Food Administration, Uppsala.
authors.forename: B G
authors.initials: BG
authors.lastname: Osterdahl
authors.forename: E
authors.initials: E
authors.lastname: Johansson
mesh_terms: D002523:Edible Grain / Q000032:analysis*; D005069:Evaluation Studies as Topic; D005492:Folic Acid / Q000032:analysis*; D005527:Food, Fortified / Q000032:analysis*; D006801:Humans; D007225:Infant Food / Q000032:analysis*; D007780:Lacticaseibacillus casei / Q000378:metabolism; D011874:Radiometry / Q000379:methods; D011933:Reagent Kits, Diagnostic
chemical_list: D011933:Reagent Kits, Diagnostic; D005492:Folic Acid