Open AccessA Sensitive Double-Isotope Derivative Assay for Norepinephrine and Epinephrine
Author(s) -
Karl Engelman,
Barry Portnoy,
Nancy A. Hurley
Publication year - 1970
Publication title -
circulation research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.899
H-Index - 336
eISSN - 1524-4571
pISSN - 0009-7330
DOI - 10.1161/01.res.26.1.53
Subject(s) - epinephrine , norepinephrine , catecholamine , metanephrines , chemistry , liter , medicine , endocrinology , isotope dilution , isotope , chromatography , urine , biology , dopamine , biochemistry , mass spectrometry , physics , quantum mechanics
A sensitive and specific double-isotope dilution method for assaying norepinephrine and epinephrine separately is described. The method is based on enzymatic conversion of these two catecholamines to their respective metanephrines and was applied successfully to measurement of resting plasma concentrations of norepinephrine and epinephrine in normal subjects with the finding that norepinephrine (0.20 ± 0.08 μg/liter) normally constitutes approximately 80% of the plasma catecholamine content and epinephrine (0.05 ± 0.03 μg/liter) 20%.
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