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Influence of temperature and short-term storage on the stability of norepinephrine in plasma samples

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Abstract

Catecholamines, as endogenous substances, are subject to biological degradation. The conditions of plasma handling for the determination of norepinephrine were investigated by using plasma samples of patients and control subjects with special regard to temperature and duration of storage. Previous studies have reported a remarkable i.v. stability of plasma norepinephrine for several hours. Here these findings were supported in a series of plasma samples which were kept either at 0° C or at room temperature. Another series of samples, which had been frozen immediately after collection, stored and rethawed, showed, however, great losses in norepinephrine within 1 to 2 h upon standing. This degradation of norepinephrine could not be attributed to monomaine oxidase (MAO) activity, because the addition of the MAO inhibitor pargyline was found to have no influence on the stability of norepinephrine. Recommendations for handling and storing of plasma samples for norepinephrine determinations are given.

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Volz, M., Gottschalk, G., Husseini, H. et al. Influence of temperature and short-term storage on the stability of norepinephrine in plasma samples. Fresenius J Anal Chem 348, 696–698 (1994). https://doi.org/10.1007/BF00325577

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  • DOI: https://doi.org/10.1007/BF00325577

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