a combined procedure based on reversed-phase liquid chromatography with electrochemical detection has been developed for the determination in the picomole range of the monoamines dopamine , norepinephrine , epinephrine and serotonin , and their major metabolites 3,4-dihydroxyphenylacetic acid , homovanillic acid , 3-methoxy-4-hydroxyphenylethylene glycol , 5-hydroxyindoleacetic acid , normetanephrine , metanephrine and 3-methoxytyramine .
C0014563
epinephrine
C0025562
metanephrine