the catecholamines ( norepinephrine , epinephrine , and dopamine ) and 5-s-l-cysteinyl-l-dopa are extracted from 1.0 ml of urine together with internal standards , by using a bond-elut strong cation-exchange ( scx ) and an affinity phenylboronic acid ( pba ) extraction column in series .
C0028351
norepinephrine
C0014563
epinephrine