Abstract
Cationic dyes of various natures have been investigated in order to select a dye that is stable under strongly alkaline conditions and applicable for the quantitative extraction-photometric determination of higher carboxylic acids. The nature of the dye, solvent, the length of the hydrocarbon radical of carboxylic acids and the pH of the aqueous phase for the extraction of ionic associates of higher carboxylic acids with cationic dye with pyronin G were experimentally studied. The study substantiates the practical application of the cationic dye pyronin G as an effective reagent for the quantitative extraction-photometric determination of higher carboxylic acids.
Highlights
Cationic dyes of various natures have been investigated in order to select a dye that is stable under strongly alkaline conditions and applicable for the quantitative extraction-photometric determination of higher carboxylic acids
The study substantiates the practical application of the cationic dye pyronin G as an effective reagent for the quantitative extraction-photometric determination of higher carboxylic acids
Identification of drying oils used in pictorial works of art by liquid chromatography of the 2-nitrophenylhydrazides derivatives of fatty acids / J
Summary
Исследованы катионные красители различной природы с целью подбора устойчивого в сильнощелочных условиях красителя применимого для количественного экстракционно-фотометрического определения высших карбоновых кислот. Экспериментально подобраны значения рН и состав растворителя, изучено влияние длины углеводородного радикала карбоновых кислот и значения рН водной фазы на экстракцию ионных ассоциатов высших карбоновых кислот с катионным красителем пиронином G. Количественно обоснована возможность применения данного катионного красителя в качестве эффективного реагента для количественного экстракционно-фотометрического определения высших карбоновых кислот. Ключевые слова: экстракция, пиронин G, экстракционно-фотометрическое определение, карбоновые кислоты, катионные красители. В. Катионные красители и их использование для количественного экстракционно-фотометрического определения высших карбоновых кислот / В.
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