Effect of the Nature of a Quaternary Ammonium Salt and the Addition of a Neutral Carrier on Analytical Characteristics of Sulfate-Selective Electrodes
- Авторы: Matveichuk Y.1, Rakhman’ko E.1, Okaev E.1
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Учреждения:
- Faculty of Chemistry
- Выпуск: Том 73, № 4 (2018)
- Страницы: 374-382
- Раздел: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183005
- DOI: https://doi.org/10.1134/S1061934818040081
- ID: 183005
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Аннотация
A film polyvinyl chloride sulfate-selective electrode based on the sterically accessible higher quaternary ammonium salt, 3,4,5-tris(dodecyloxy)benzyl(oxyethyl)3trimethylammonium chloride, using 1-bromonapthalene as a plasticizer and heptyl p-trifluoroacetylbenzoate as a solvating agent was developed. The limit of detection of the electrode was 6.7 × 10−7 M, lifetime was 1 month, and the slope of the electrode function was 27 mV/decade. The electrode is selective in the presence of interfering Cl−, C2O4−, Br−, and NO3−ions. The interference of carbonate ions was eliminated by maintaining pH at 3.2 ± 0.1. Based on IR spectroscopic and potentiometric studies, it is most likely that the solvation of sulfate ions with heptyl p-trifluoroacetylbenzoate occurs through interaction with the trifluoroacetyl carbonyl carbon atom rather than with hydroxyl groups of the hydrate form.
Об авторах
Yu. Matveichuk
Faculty of Chemistry
Автор, ответственный за переписку.
Email: Yu_Matveychuk@mail.ru
Белоруссия, Minsk, 220030
E. Rakhman’ko
Faculty of Chemistry
Email: Yu_Matveychuk@mail.ru
Белоруссия, Minsk, 220030
E. Okaev
Faculty of Chemistry
Email: Yu_Matveychuk@mail.ru
Белоруссия, Minsk, 220030