Libro de resúmenes - DEVELOPMENT OF A MOLECULAR FLUORESCENCE METHODOLOGY TO DETERMINATION OF METSULFURÓN METHYL HERBICIDE IN ENVIRONMENTAL SAMPLES.

Congreso

Resumen *

Anew method for 2,4-dichlorophenoxyacetic acid (2,4-D)pre-concentration/separation and determination by molecularfluorescence is proposed. The herbicide was complexed with RhodamineB at pH 7.0 in phosphatebuffer solution and anionic surfactant admicelles;a Nylon membrane was used as a solid support forsolid fluorescent emission measured using a solid sample holder.Under optimal conditions, the limit of detection and quantificationwere 6.93 and 21 ng L−1,respectively, and the linear range from 0.021 to22.11 μg L−1.This method shows good sensitivity and selectivity, and it wasapplied to the determination of 2,4-D in different seed samples. Theuse of solid surface fluorescence represents a simple and rapidalternative respect to conventional methods, employing instrumentexistent in the most laboratories. thod for 2,4-dichlorophenoxyacetic acid (2,4-D)pre-concentration/separation and determination by molecularfluorescence is proposed. The herbicide was complexed with RhodamineB at pH 7.0 in phosphatebuffer solution and anionic surfactant admicelles;a Nylon membrane was used as a solid support forsolid fluorescent emission measured using a solid sample holder.Under optimal conditions, the limit of detection and quantificationwere 6.93 and 21 ng L−1,respectively, and the linear range from 0.021 to22.11 μg L−1.This method shows good sensitivity and selectivity, and it wasapplied to the determination of 2,4-D in different seed samples. Theuse of solid surface fluorescence represents a simple and rapidalternative respect to conventional methods, employing instrumentexistent in the most laboratories. Información suministrada por el agente en SIGEVA