title: Sensitive determination of deuterated and non-deuterated tryptophan, tryptamine and serotonin by combined capillary gas chromatography and negative ion chemical ionization mass spectrometry.
abstract: Sensitive methods for the determination of deuterated and non-deuterated tryptophan, tryptamine and serotonin by combined capillary gas chromatography and negative ion chemical ionization mass spectrometry were developed. [3,3-2H2]-L-Tryptophan, which was used as a tracer, was synthesized for studies of their in vivo metabolism. Tryptophan was converted into its trifluoroacetylmethyl derivative after prepurification with an AG 50W-X2 cation-exchange column. Tryptamine and serotonin were extracted with 20% butanol in diethyl ether and derivatized with trifluoroacetic anhydride. These derivatives were separated and determined by selected ion monitoring. In these determinations, [2',3,3,4',5',6',7'-2H7]-D,L-tryptophan, [alpha,alpha,beta,beta-2H4]tryptamine and [alpha,alpha,beta,beta-2H4]serotonin were used as internal standards.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007202:Indicators and Reagents; D007700:Kinetics; D012701:Serotonin / Q000032:analysis* / Q000097:blood / Q000652:urine; D014363:Tryptamines / Q000032:analysis* / Q000097:blood / Q000652:urine; D014364:Tryptophan / Q000032:analysis* / Q000097:blood / Q000652:urine
chemical_list: D007202:Indicators and Reagents; D014363:Tryptamines; D012701:Serotonin; C030820:tryptamine; D014364:Tryptophan