The separation of epinephrine from norepinephrine and dopamine from DOPA on Sephadex G-10.

Epinephrine and norepinephrine were separated by acid elution through a Sephadex G-10 column with high recovery (better than 90%), excellent reproducibility, and little overlap (less than 10%). Once packed, the columns could be re-used indefinitely. Total elution time was about six hours and the columns could be left untended since the gravity flow stops automatically once the level of the eluant reaches the gel bed. The resulting dilution was five-fold. 3,4-Dihydroxyphenylalanine (DOPA) was completely separated from 3,4-dihydroxyphenylethylamine (dopamine) by the same procedure.