Flow injection determination of fluoride by morin-aluminum reagent with spectrofluorimetric detection

摘要

A flow injection system is reported for the determination of fluoride based on its effects on the fluorescence intensity of Al-morin complex at pH 3.0 in ethanol-water mixture. The effect of important parameters such as excitation and emission wavelengths, pH, reagents concentrations, flow rate of the carrier stream, sample injection volume, time of measurement and interferences are reported. Cation and anion exchange resins were used to remove interferences and to preconcentrate fluoride ions prior to measurement.