A colorimetric method for the determination of the principal metabolites of nicotinic acid in human urine.
D003124:Colorimetry; D006801:Humans; D009525:Niacin / Q000378:metabolism*; D009539:Nicotinic Acids; D014556:Urine
D009539:Nicotinic Acids; D009525:Niacin
COLORIMETRY; NICOTINIC ACID/metabolism; URINE