THE POSSIBILITY OF EFFECTIVE USE OF BASIC DYES OF THE "BAZAKRYL" TRADEMARK IN THE DETERMINATION OF ANIONIC SURFACTANTS

Abstract

This study shows the prospects of using "Bazacryl" brand dyes in spectrophotometric analysis. On the basis of previous studies, their main spectrophotometric and protolytic characteristics have already been established, which made it possible to find out the optimal conditions for the formation of ionic associates of anionic surfactants with "Bazakrils". The studied dyes are characterized by a sufficiently high color intensity within a wide range of changes in the acidity of the medium, and in terms of these properties, they are not inferior to the majority of known basic dyes used in analytical practice. The kinetic factors of extraction were studied. As a result, the extraction equilibrium is established after 10-30 seconds of mixing the phases and practically does not depend on the used extractant, but 1-3 min. centrifugation is sufficient for complete phase separation. The optical density of the extracts of the formed IA does not change within 2 hours. It was established that such dyes show the ability to form IA from APAR and can serve as analytical reagents for their determination. The optimal conditions for the formation and extraction of IA APAR with new dyes have been established. A new, simple and rapid method for determining APAR in various samples of wastewater and natural waters, detergents, etc. is proposed. Keywords: dyes; spectrophotometry; ionic associate; protolytic properties; spectrophotometric properties.