Determination of the pesticide carbaryl by microemulsion room-temperature phosphorescence in real samples

Abstract

A room-temperature phosphorescence method for the determination of the pesticide carbaryl is described. The proposed method is based on the formation of a microemulsion obtained by mixing an apolar solvent with the surfactant sodium dodecyl sulfate as the micellar medium in the presence of thallium nitrate as the external heavy atom salt. To avoid the oxygen quenching, a sodium sulfite solution was used. A complete and exhaustive statistical analysis of experimental data by a multivariate optimization approach was performed to establish the optimum experimental variables. Good results have been obtained when the insecticide have been analyzed in synthetic and real samples.