The application of the resonance enhanced Rayleigh lightscattering technique for the determination of gold(III) with a new triazene reagent

The resonance Rayleigh light-scattering (RRLS) signal of a new triazene rea gent, 1-(p-chlorophenyl)-3-(2-thiazolyl)triazene (p-ClPTT), is first synthe sized and characterized in this paper, in the 450-550 nm wavelength range i s enhanced, remarkably by Au3+. A new method for the determination of Au3by the RRLS technique in the presence of Tween-20 has been developed. The c alibration graph shows good linearity over a concentration range of 5.0-800 mug/l with a detection limit of 3.0 mug/l. Except for IO4-, SCN- and Pd2+, no other foreign ions interfere in the determination at concentrations les s than 10-fold of Au3+. The method is thus simple, sensitive; and of good s electivity, and has been successfully used for the determination of trace g old in the ore samples.