Polarographic and Voltammetric Determination of N,N-Dimethyl-4-amino-4'-sulfoazobenzene
| Autor: | Jiří Barek, Pham Tuan Hai, Viktor Mejstřík, Josino C. Moreira, Jiří Zima |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Collection of Czechoslovak Chemical Communications. 62:597-608 |
| ISSN: | 1212-6950 0010-0765 |
| DOI: | 10.1135/cccc19970597 |
| Popis: | The polarographic behaviour of N,N-dimethyl-4-amino-4'-sulfoazobenzene 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. Optimum conditions have been found for its determination by tast polarography in the concentration range of 2-100 μmol l-1, differential pulse polarography at a dropping mercury electrode in the concentration range of 0.2-100 μmol l-1 and by differential pulse voltammetry at a hanging mercury drop electrode in the concentration range of 0.02-10 μmol l-1. The sensitivity of the determination can be further improved by adsorptive accumulation of the test substance on the hanging mercury drop electrode. Three-minute accumulation in stirred solution allows determination in the range of 0.2-100 nmol l-1. |
| Databáze: | OpenAIRE |
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