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Reversed-phase HPLC separation of plasma norepinephrine, epinephrine, and dopamine, with three-electrode coulometric
N R Musso1, C Vergassola, A Pende
1Cattedra Patologia Speciale Medica R, Ospedale San Martino, Universita' di Genova, Italy.
Clinical Chemistry
|September 1, 1989
Abstract:
We present a method involving minor modifications of previous techniques, in which we use an ion-pair reversed-phase HPLC separation with three-electrode coulometry. Isocratic baseline separations can be obtained in 5 min. The sample preparation procedure, involving extraction with alumina at low temperature, allows good reproducibility (within-run and between-run CVs less than 10%) and improved sensitivity (less than 5 pg of each catecholamine per extract). This method allows approximately 70 low-cost plasma catecholamine analyses to be done in a working day.