picomole level determination of hydroxytryptophan , tryptophan , histidine , lysine , ethanol amine , arginine , noradrenaline , diaminopropane , putrescine , histamine , cadaverine , dopamine , hexamethylenediamine , agmatine , tyramine , phenethylamine , serotonin , 5,6-dihydroxytryptamine , 5-methoxytryptamine , tryptamine , spermidine , and spermine is carried out by ion-exchange column chromatography on a single sample in 170 min of total analysis .
C0036751
serotonin
C0000589
5-methoxytryptamine