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Spectrofluorimetric determination of clioquinol in pharmaceutical preparations |
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| Authors: | J Giménez-Izquierdo J Guiteras A Izquierdo and M D Prat |
| Institution: | (1) Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, W-3400 Göttingen, Federal Republic of Germany;(2) Institut für Physikalische Chemie und Elektrochemie, Universität Hannover, W-3000 Hannover, Federal Republic of Germany |
| Abstract: | Summary The absorption spectrum of the nitrate radical (NO3) in aqueous solution and the kinetic of the reactions with Cl– and OH– have been determined using laser-spectrometric techniques. The maximum absorption was found at 635 nm with a decadic absorption coefficient of  =(530±110) l/mol·cm. At 298 K rate constants of k1=(1.0±0.2)·107 l/mol·s for the reaction with chloride and of k2=(8.2±0.9)·107 l/mol·s for the reaction with hydroxide were obtained. |
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