Specific gas chromatographic determination of xanthines and barbiturates by flash-heater N-butylation.
D001463:Barbiturates / Q000032:analysis*; D002087:Butyrates; D002849:Chromatography, Gas; D006358:Hot Temperature; D008722:Methods; D008745:Methylation; D014970:Xanthines / Q000032:analysis*
D001463:Barbiturates; D002087:Butyrates; D014970:Xanthines