The synthesis and application of 1-(o-nitrophenyl)-3-(2-thiazolyl)triazenefor the determination of palladium(II) by the resonance enhanced Rayleigh light-scattering technique

The resonance Rayleigh light-scattering (RRLS) signal of a new triazene rea gent; 1-(o-nitrophenyl)-3-(2-thiazolyl)triazene (o-NPTT), was firstly synth esized and characterized in this paper at 500-600 nm wavelength range and c an be enhanced remarkably by Pd2+. According to this phenomenon, a new meth od was developed for the determination of Pd2+ by the RRLS technique in the presence of Tween-80. The calibration graph showed good linearity over a c oncentration range of 5.0-700 mu g l(-1) with a detection limit of 1.0 mu g l(-1). There are almost no foreign ions interfered in the determination at a more than fivefold concentration of Pd2+. The method is relatively sensi tive, of good selectivity and has been successfully used for the determinat ion of trace palladium in the slag of fertilizer factories and catalyst sam ples. (C) 2000 Elsevier Science B.V. All rights reserved.