Polarographic and Voltammetric Determination of 1-(4-Methoxyphenyl)-3-methyltriazene
| Autor: | Jiří Barek, Jiří Zima, Viktor Mejstřík, Eva Pertileová, Josino C. Moreira |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Collection of Czechoslovak Chemical Communications. 61:107-119 |
| ISSN: | 1212-6950 0010-0765 |
| DOI: | 10.1135/cccc19960107 |
| Popis: | The polarographic behaviour of 1-(4-methoxyphenyl)-3-methyltriazene in a mixed aqueous-methanolic medium was investigated by tast polarography and differential pulse polarography at a dropping mercury electrode, constant-potential coulometry at a large area mercury electrode and cyclic voltammetry at a hanging mercury drop electrode. A mechanism has been proposed for its polarographic reduction and optimal conditions have been found for its determination by tast polarography in the concentration range 2-100 μmol l-1 and by differential pulse polarography at a dropping mercury electrode, differential pulse voltammetry at a hanging mercury drop electrode and linear scan voltammetry at a hanging mercury drop electrode in the concentration range 0.2-100 μmol l-1. The sensitivity of the determination can be further improved through adsorptive accumulation of the test substance on the surface of the hanging mercury drop electrode; fifteen-second accumulation in stirred solution allows determination in the range 0.01-0.1 μmol l-1. |
| Databáze: | OpenAIRE |
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