V. Kabasakalis, FLUOROMETRIC-DETERMINATION OF SILVER WITH BRILLIANT GREEN IN AQUEOUS SYSTEMS AND ITS APPLICATION IN PHOTOGRAPHIC FIXING SOLUTIONS, Analytical letters, 27(14), 1994, pp. 2789-2796
A fluorimetric procedure for Ag+ determination in aqueous solutions wa
s developed based on the ion association complex formed from the react
ion between AgI2- and the brilliant green cation and its strong fluore
scence (lambda(exc) 256 nm, lambda(em) 521 nm). Silver ions could be d
etermined satisfactorily in the range of 0-100 mu gAg(+)/L. Optimum co
nditions for complex formation and measurement of fluorescence intensi
ty were : pH=3.0; concentrations of brilliant green and KI, 15 and 100
mg/L, respectively; time, within 15 min after complex formation. The
method proved successful in determing Ag+ in photography fixing soluti
ons and the results agreed satisfactorily with those obtained using a
standard Atomic Absorption Spectrometry method.