Autor: |
Jiří Barek, Jitka Beranová, Jiří Zima, Josino Costa Moreira, Arnold G. Fogg, Viktor Mejstřík |
Rok vydání: |
1997 |
Předmět: |
|
Zdroj: |
Analytica Chimica Acta. 356:231-237 |
ISSN: |
0003-2670 |
DOI: |
10.1016/s0003-2670(97)00550-3 |
Popis: |
The polarographic behaviour of anthraquinone dye Ostacetate Blue P3R in a mixed water–ethanol (1 : 9) medium was investigated, and optimal conditions were found for its determination by DC tast polarography in the 20–700 μmol l −1 concentration range, by differential pulse polarography at a dropping mercury electrode in the 1–70 μmol l −1 concentration range, as well as by differential pulse voltammetry at a hanging mercury drop electrode in the 0.2–1 μmol l −1 concentration range. 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; five minutes accumulation in unstirred solution allows determination in the 0.02–1 μmol l −1 concentration range. Practical applicability of the newly developed methods in river water was demonstrated. |
Databáze: |
OpenAIRE |
Externí odkaz: |
|