Voltammetric determination of aluminum-Alizarin S complex by renewable silver amalgam electrode in river and waste waters
| Autor: | Justyna Zuziak, Małgorzata Jakubowska |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Calibration curve General Chemical Engineering 010401 analytical chemistry Inorganic chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology Zinc Electrolyte 021001 nanoscience & nanotechnology Alizarin 01 natural sciences 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound chemistry Adsorptive stripping voltammetry Electrochemistry Amalgam (chemistry) 0210 nano-technology Voltammetry |
| Zdroj: | Journal of Electroanalytical Chemistry. 794:49-57 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2017.04.009 |
| Popis: | The direct voltammetric determination of aluminum is difficult because it is reduced at very low potential − 1.75 V versus Ag/AgCl. Therefore, in this work a simple and rapid stripping voltammetry method of Alizarin S-Al complex determination on renewable silver amalgam film electrode was proposed. The electrode process in complex electrolyte is irreversible and controlled by the surface phenomena. Experimental conditions such as preconcentration time and operation parameters were optimized. The promising results were obtained in 0.1 M ammonia buffer, 0.01 M KBrO 3 , 0.25 μM Ca, 0.1 μM EDTA. The calibration graph was linear from 5 to 45 μg L − 1 with sensitivity of 14.6 μA/mg L − 1 , detection limit of 0.2 μg L − 1 and repeatability below 3.5%. With accumulation time of 4 s the sensitivity increases to 17.4 μA/mg L − 1 with r = 0.9978 but the range of linearity was limited to 20 μg L − 1 . The problem of the main interferent which is zinc was resolved by the EDTA addition. Procedure was verified using waste waters CRMs with recovery 99–110% and spiked Vistula River water. |
| Databáze: | OpenAIRE |
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