Fluorimetric determination of sulphate by ternary complex formation with zirconium and biacetylmonoxime nicotinylhydrazone.
A fluorimetric procedure for the determination of sulphate (0.5-6 mug ml ) based on the formation of a ternary complex with biacetylmonoxime nicotinylhydrazone and zirconium(IV) is described. The excitation and fluorescence maxima are at 415 and 505 nm, respectively. The method is rapid and the procedure reproducible. The precision is +/- 2% near to the middle range of the calibration curves. There is no interference from most common ions. Phosphate and fluoride are tolerated at 100-fold molar ratio to sulphate. The method has been applied to the determination of sulphate in a variety of water samples.
Rubio
S
S
Department of Analytical Chemistry, Faculty of Sciences, University of Cordoba, Córdoba, Spain.
Gomez-Hens
A
A
Valcarcel
M
M