Photodegradation kinetics of acesulfame-K solutions under UV light: effect of pH |
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| Authors: | C A C Coiffard L J M Coiffard and Y M R De Roeck-Holtzhauer |
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| Affiliation: | (1) Laboratory of Industrial Pharmacy, School of Pharmacy, University of Nantes, 1 Rue Gaston Veil, F-44035 Nantes Cedex, France, FR |
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| Abstract: | The objective of this research was to study the effect of pH on the photodegradation of aqueous solutions of 5×10–5 M acesulfame-K (λmax, 226 nm;ε, 11 400 mol–1 L cm–1). Photodegradation followed first-order kinetics and was found to be pH-dependent. The degradation rate constant was calculated
to be 6.7×10–2 min–1, 4.5×10–2 min–1, 3.4×10–2 min–1 and 17.4×10–2 min–1, respectively, at pH 3, pH 9 and pH 12.
Received: 21 April 1998 / Revised version: 9 June 1998 |
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| Keywords: | Photodegradation Acesulfame-K Aqueous diluted solutions pH |
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