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Flow-injection spectrophotometric determination of adrenaline and dopamine with sodium hydroxide

✍ Scribed by J.J. Berzas Nevado; J.M. Lemus Gallego; P. Buitrago Laguna

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 319 KB
Volume: 14
Category: Article
ISSN: 0731-7085
DOI: 10.1016/0731-7085(95)01663-5

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✦ Synopsis

A new, rapid and economical flow-injection method for determining adrenaline and dopamine is proposed on the basis of the hydrolysis of these compounds in alkaline medium. The method was optimized by using a spectrophotometer operating at lambda = 390 nm as detector. Calibration graphs were linear up to 2 x 10(-4) M with quantification limits of 2.5 x 10(-6) M and 3.3 x 10(-6) M for dopamine and adrenaline respectively. Flow-injection allows the measurement of 130 samples per hour. The method was successfully applied for the determination of catecholamines in pharmaceuticals.

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