Solid-contact potentiometric sensors based on ion pairs of cetylpyridinium with dodecylsulfate and tetraphenylborate for various surfactants

Compositions of active membrane components for solid-contact potentiometric sensors selective to various surfactants were proposed. The stoichiometric ratios of components and the solubility and thermal stability of organic ion-exchangers were estimated. The main electroanalytical parameters of sensors were determined. Procedures for the potentiometric determination of nonionic surfactants in wastewater, cationic surfactants in hair rinses, and separate determination of nonionic and anionic surfactants in shampoos and synthetic detergents were developed.