| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Journal of Applied Electrochemistry; v. 43, n. 9, p. 919-926, SEP 2013. |
| Web of Science Citations: | 12 |
| Abstract | |
This paper describes a rapid and reliable method for dopamine (DA), ascorbic acid (AA), and uric acid (UA) determination in human urine using a cathodically pretreated poly(1-aminoanthraquinone) (PAAQ)-modified electrode. By applying a simple cathodic pretreatment to the PAAQ electrode well-defined voltammetric peaks for AA, DA, and UA were obtained. The pretreated PAAQ showed good selectivity, sensitivity, and repeatability for measuring AA, DA, and UA with detection limits of 2.50 x 10(-5), 3.05 x 10(-6), and 1.15 x 10(-5) M, respectively. The practical applicability of the modified electrode is illustrated by selective measurements of AA and UA in human urine without any preliminary treatment. Recovery values between 94.8 and 102 % for AA and between 77.8 and 100 % for UA were obtained with a relative standard deviation of 2.74 and 2.98 %, respectively. (AU) | |
| FAPESP's process: | 08/06867-8 - Development, characterization and analytical applications of nanocomposites electrodes in catecholamines and flavonoids determination |
| Grantee: | Ronaldo Censi Faria |
| Support Opportunities: | Regular Research Grants |