the time , temperature , and ph of the trihydroxyindole reaction were controlled to minimize interference between norepinephrine ( ne ) and epinephrine ( e ) so that , in plasma catecholamine assay within normal human physiologic range , ne contributes less than 1 per cent to the fluorescence produced from e , and e contributes only 0.5 to 10 per cent to ne fluorescence ;
C0007412
catecholamine
C0028351
ne