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Application of Sulphonated Styrene and Divinylbenzene Copolymers with Various Degrees of Crosslinking to Ion Exclusion Chromatographyстатья Исследовательская статья
- Авторы: Laptev A.Yu, Rozhmanova N.B., Sevko A.V., Nesterenko P.N.
- Журнал: Journal of Analytical Chemistry
- Том: 80
- Номер: 1
- Год издания: 2025
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 134
- Последняя страница: 147
- DOI: 10.1134/S1061934824701612
- Аннотация: The chromatographic retention of neutral polar compounds (alcohols, ketones, carboxylic acids, carbohydrates, and sweeteners) and compounds in the ionized form (mono- and dibasic organic acids) on cation exchange columns packed with sulfonated poly(styrene-divinylbenzene) having crosslinking degrees of 8% (Nautilus-IE) and 10% (Sevko AA) is studied in ion exclusion chromatography. Using 5 mM sulfuric acid, the retention parameters of the compounds are determined and new patterns are obtained, clarifying the mechanism of retention of organic acids in ion-exclusion chromatography. It is found that the retention of all the studied compounds (logk') is directly proportional to hydrophobicity values (logPexp). In this case, the electrostatic repulsion of organic acids from the sulfo groups of the cation exchanger shifts the logk'–logPexp dependences by a constant value, proportional to the number of carboxyl groups. A possibility of using the Sevko AA column not only for amino acid analysis, but also for the determination of organic acids and alcohols in complex samples by ion exclusion chromatography with spectrophotometric and refractometric detection is shown.
- Добавил в систему: Рожманова Нина Борисовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | 346_Laptev_J._Anal._Chem._80_2025_134-147.pdf | 346_Laptev_J._Anal._Chem._80_2025_134-147.pdf | 1,3 МБ | 5 мая 2025 [nb.rozhmanova] | |
| 2. | Экспертное_заключение_ЖАХ_1номер.pdf | Экспертное_заключение_ЖАХ_1номер.pdf | 1,8 МБ | 5 мая 2025 [nb.rozhmanova] |