Synergetic effects in the flow injection analysis determination of catechol in the presence of excess ascorbic acid by series dual-band amperometric detection1Presented at: European Society for Electroanalytical Chemistry '98, Seventh European Conference on Electroanalysis, University of Coimbra, Coimbra, Portugal, 24–28 May 1998.1
| Autor: | J. F. Rubinson, Hans Zimmer, Sven H. Hausner, Hong Zhang, Suzanne K. Lunsford, Ozcan Ceylan, George C. Russell, Nada F. Atta, Harry B. Mark, George P. Kreishman, Anthony I Khaskelis, Ahmed Galal |
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| Rok vydání: | 1999 |
| Předmět: |
Flow injection analysis
Catechol Chemistry organic chemicals Ultramicroelectrode Ascorbic acid Biochemistry Amperometry Analytical Chemistry Catalysis chemistry.chemical_compound bacteria Environmental Chemistry Organic chemistry Cyclic voltammetry Quantitative analysis (chemistry) Spectroscopy Nuclear chemistry |
| Zdroj: | Analytica Chimica Acta. 385:281-285 |
| ISSN: | 0003-2670 |
| DOI: | 10.1016/s0003-2670(98)00585-6 |
| Popis: | The deviations at high concentrations (>10 −5 M) in the calibration curves for the determination of catechol in catechol/ascorbic acid mixtures by flow injection analysis using series dual-band poly(3-methylthiophene)-coated electrodes has been re-examined. The cyclic voltammetry (at pH≅7.4) of catechol/ascorbate and catechol/urate mixtures and NMR measurements show these deviations are the result of the simultaneous homogeneous catalytic reaction of dehydrocatechol with ascorbate. |
| Databáze: | OpenAIRE |
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