| Autor: |
Bazel’, Ya., Shkumbatyuk, R., Voronich, O. |
| Předmět: |
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| Zdroj: |
Journal of Analytical Chemistry; Mar2006, Vol. 61 Issue 3, p236-241, 6p, 3 Charts, 2 Graphs |
| Abstrakt: |
The extraction of nitrophenols with polymethine dyes of the common formula R1-(CH=CH)3-R2, indolium and benzothiazolium derivatives was studied. The effect of the acidity of the solution, the nature and the concentration of the dye, and the nature of the organic solvent on the formation and extraction of ion pairs of nitrophenols was examined; the optimum conditions were found. The most important chemical analytical characteristics of the ion pairs were determined. Molar absorptivities of extracts are 11.9 × 104–14.3 × 104 for ion pairs of trinitrophenol and 6.8 × 104–10.1 × 104 for ion pairs of dinitrophenol. A new procedure was developed for the extraction-photometric determination of nitrophenols in a mixture. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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