Yu Jing-Hua, Dai Ping, Ge Shen-Guang, Zhu Yuan-Na, Zhang Li-Na, Cheng Xiao-Liang
School of Chemistry and Chemical Engineering, University of Jinan, No. 106, Jiwei Road, Jinan 250022, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Feb;72(1):17-21. doi: 10.1016/j.saa.2008.06.047. Epub 2008 Jul 25.
A precise, simple, new spectrofluorimetry method is proposed for determination of trace antimony which is based on the reaction between potassium periodate and the new type fluorescent reagent 3-o-chlorophenyl-5-(2'- arsenoxylphenylazo) rhodanine (2ClRAAP). The possible mechanism is proposed. The fluorescence intensity is investigated to be sharply enhanced by the oxidation of 3-o-chlorophenyl-5-(2'-arsenoxylphenylazo) rhodanine by potassium periodate with antimony as catalyst in the buffer medium of potassium hydrogen phthalate-sodium hydroxide (pH 5.2). Under the optimum conditions the great increase of fluorescence intensity has a linear relationship against the concentration of antimony in the range of 0.2-10 microg L(-1) with a detection limit of 1.65 x 10(-10) g mL(-1). This proposed method led to the satisfied determination of antimony in environment water.
