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Original Articles

THE APPLICATION OF THE RESONANCE ENHANCED RAYLEIGH LIGHT-SCATTERING TECHNIQUE FOR THE DETERMINATION OF GOLD(III) WITH A NEW TRIAZENE REAGENT

, , , &
Pages 773-784 | Received 02 Oct 2000, Accepted 03 Jan 2001, Published online: 02 Feb 2007
 

Abstract

The resonance Rayleigh light-scattering (RRLS) signal of a new triazene reagent, 1-(p-chlorophenyl)-3-(2-thiazolyl)triazene (p-ClPTT), is first synthesized and characterized in this paper, in the 450–550 nm wavelength range is enhanced remarkably by Au3 +. A new method for the determination of Au3 + by the RRLS technique in the presence of Tween-20 has been developed. The calibration graph shows good linearity over a concentration range of 5.0–800 μg/l with a detection limit of 3.0 μg/l. Except for IO4 , SCN and Pd2+, no other foreign ions interfere in the determination at concentrations less than 10-fold of Au3 +. The method is thus simple, sensitive and of good selectivity, and has been successfully used for the determination of trace gold in the ore samples.

ACKNOWLEDGMENT

The calculation software (GAUSSIAN 94) was provided by Dr. Baotao Fan (University Parts 7-Denis Diderot), We wish to express our heartfelt thanks to him for his warm-hearted help.

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