Fs. Rojas et Jmc. Pavon, SPECTROFLUOROMETRIC DETERMINATION OF GALLIUM WITH N-(3-HYDROXY-2-PYRIDYL)SALICYLALDIMINE AND ITS APPLICATION TO THE ANALYSIS OF BIOLOGICAL SAMPLES, Anales de quimica, 91(7-8), 1995, pp. 537-539
The fluorimetric determination of gallium at the nanogram level, based
on the formation of a fluorescent complex between Ga(III) and N-(3-hy
droxy-2-pyridyl)salicylaldimine (3-OH-PSA), is proposed. With excitati
on at 397 nm, the chelate has a maximum emission at 498 nm. The reacti
on is carried out at acidic pH in aqueous-DMF medium (40% v/v DMF). Th
e influence of the reaction variables are discussed. The detection lim
it is 0.9 ng ml(-1) and the range of application is 1-125 ng ml(-1). T
he relative error of the method is +/- 1.6%. The proposed method has b
een applied to the determination of gallium in biological samples.