New modified electrodes for the separate determination of anionic surfactants

Nylon, chitin, polyvinyl chloride, and polymethyl methacrylate molecular sieves with pores of various size are studied as membrane surface modifiers in electrodes reversible to anionic surfactants. A procedure for the synthesis of molecular sieves with pores of the specified size from water-insoluble polymeric matrix (polyvinyl chloride, polymethyl methacrylate) was developed. Different methods were proposed for modifying the electrode surface. It was demonstrated that modified electrodes provide the separate determination of alky 1 sulfates bearing alkyl radicals of different lengths (C₁₂-C₁₄).