The Determination of Catechols in the Presence of Ascorbic Acid and Uric Acid by Flow Injection Analysis Employing a Potentiometric Dibenzo-18-crown-6 Electrode Detector
| Autor: | Hans Zimmer, Suzanne K. Lunsford, Ahmed Galal, Y. L. Ma, Harry B. Mark, Naim Akmal |
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| Rok vydání: | 1994 |
| Předmět: |
Flow injection analysis
Detection limit Catechol Chromatography Biochemistry (medical) Clinical Biochemistry Potentiometric titration Analytical chemistry chemistry.chemical_element Ascorbic acid Biochemistry Amperometry Analytical Chemistry chemistry.chemical_compound chemistry Electrode Electrochemistry Platinum Spectroscopy |
| Zdroj: | Analytical Letters. 27:2141-2151 |
| ISSN: | 1532-236X 0003-2719 |
| DOI: | 10.1080/00032719408007241 |
| Popis: | A polished platinum disc was modified by electropolymerization of dibenzo-18-crown-6 (DB-18-C-6) onto the surface. This DB-18-C-6 electrode has been used as a detector for catechol and catecholamines in a potentiometric-flow injection mode. The potentiometric-flow injection response of the DB-18-C-6 modified electrode exhibited a linear response for catechol and catecholamine concentrations from 10-2—10-6 M achieving detection limits as low as 0.5 × 10-6M. An interference study was carried out with ascorbic acid and uric acid which are serious interferents using amperometric detectors. No significant interference was observed for the presence of either of these two or mixture of these two common interferents until they were in greater than a 10-fold excess. 1 Present address: Department of Chemistry, College of Sciences, University of Cairo, Giza, Egypt 2 Present address: Teledyne, 16830 Chestnut Street, City of Industry, CA 91749—1580 3 Present address: College of Medicine, Univ. of Florida, Gai... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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