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Extraction of humic acids and their fractions in polyethylene glycol-based aqueous biphasic systemsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Zavarzina A.G., Demin V.V., Nifant’eva T.I., Shkinev V.M., Danilova T.V., Spivakov B.Ya
- Журнал: Analytica Chimica Acta
- Том: 452
- Год издания: 2002
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 95
- Последняя страница: 103
- Аннотация: The possibility of extraction and fractionation of humic acid (HA) in the aqueous biphasic systems (ABS) was shown for the first time. The 10% PEG–10% (NH4)2SO4–H2O and 5% PEG–7.5% dextran (or dextran sulphate, sodium salt)–H2O systems were used. HA originated from peat, soddy-podzolic soil and chernozem were studied. The distribution coefficients were measured for HA of different origin, size of the molecules, molecular weights (MW) of the polymers and pH of the system. The PEG–(NH4)2SO4–H2O system was found to be better for preconcentration and isolation of HA, whereas the PEG–dextran–H2O system is preferable for HA fractionation. The extractability of HA in ABS increases with increasing the MW of HA molecules. Peat HA are extracted in ABS with higher distribution coefficients compared with chernozem and soddy-podzolic soil HA. It is consistent with higher hydrophobicity of peat HA revealed by hydrophobic interaction chromatography. ABS are promising for HA separation into fractions that differ in their hydrophobic/hydrophilic properties as well as for comparing HA of different origin by their relative hydrophobicity.
- Добавил в систему: Заварзина Анна Георгиевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | article.pdf | article.pdf | 212,2 КБ | 13 февраля 2013 [AZavarzina] |