title: The effect of diphenylhydantoin on the microbial assay of serum folate.
abstract: 1. Two modifications fo the usual method of assay for folic acid in solutions are reported which appear to improve this procedure. These are a reduction of incubation time and dilution with 95% ethanol. 2. Experimental results are reported which indicate that Dilantin (5,5-diphenylhydantoin) does not interfere with the microbiological assay for folic acid.
mesh_terms: D001681:Biological Assay; D005492:Folic Acid / Q000097:blood* / Q000494:pharmacology; D006801:Humans; D007780:Lacticaseibacillus casei / Q000187:drug effects; D008722:Methods; D010672:Phenytoin / Q000097:blood* / Q000494:pharmacology
chemical_list: D010672:Phenytoin; D005492:Folic Acid