Сорбция флавоноидов и ароматических кислот на сверхсшитом полистироле в системах с добавками имидазолиевых ионных жидкостей
Аннотация
В данной работе методом обращенно-фазовой ВЭЖХ (ОФ ВЭЖХ) оценено влияние добавок пяти имидазолиевых ионных жидкостей (ИЖ) к водно-ацетонитрильному элюенту на сорбцию ароматических кислот и флавоноидов на сверхсшитом полистироле (СПС). Было установлено, что на удерживание исследуемых соединений влияют как природа катиона, так и природа аниона используемой ИЖ. Изучено удерживание ароматических кислот и флавоноидов в системах без добавления и с добавлением в элюент трифторуксусной кислоты (ТФУ). Показано, что добавление ТФУ в водно-ацетонитрильный элюент изменяет механизм действия имидазолиевых ИЖ на удерживание сорбатов на СПС. В частности, порядок выхода феруловой, салициловой и кофейной кислот в системах с ИЖ на СПС меняется в зависимости от рН среды (в зависимости от добавления ТФУ). Для оценки влияния состава водно-ацетонитрильного элюента на удерживание исследуемых соединений использовали модели Снайдера-Сочевинского и Сочевинского-Вахтмейстера. Были рассчитаны угловые коэффициенты соответствующих моделей.
Скачивания
Литература
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