with a lichrosorb rp-18 ( 10 micrometer ) column and a mobile phase consisting of a phosphate ( nah2po4 , 0.1 m ) -methanol mixture with octylsulfonate ( 2.6 x 10 ( -3 ) m ) at ph 3.35 and 26 degrees c , the separation of dopa , dopamine , norepinephrine , 3,4-dihydroxyphenylacetic acid , homovanillic acid , 4-hydroxy-3-methoxyphenylalanine , trp , 5-hydroxytryptophan ( 5-htp ) , serotonin , and 5-hydroxyindoleacetic acid was achieved .
C0041249
trp
C0000578
5-htp