title: Rapid spectrophotometric assay for nicotinic acid.
mesh_terms: D001965:Bromides; D002021:Buffers; D003486:Cyanides; D008722:Methods; D008832:Microchemistry; D009243:NAD / Q000032:analysis; D009539:Nicotinic Acids / Q000032:analysis*; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D013053:Spectrophotometry; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D001965:Bromides; D002021:Buffers; D003486:Cyanides; D009539:Nicotinic Acids; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D009243:NAD