title: Modified procedure for determining vitamin B1 by gas chromatography.
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D005410:Flame Ionization; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D013831:Thiamine / Q000031:analogs & derivatives / Q000032:analysis*
chemical_list: D010758:Phosphorus; D009584:Nitrogen; D013831:Thiamine