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in Micellar Medium

By Rhodamine B and Mohsen Keyvanfard

Abstract

Abstract—A new, simple and highly sensitive kinetic spectrophotometric method was developed for the determination of trace amounts of Ru(III) in the range of 0.06-20 ng/ml.The method is based on the inhibitory effect of ruthenium(III) on the oxidation of Rhodamine B by bromate in acidic and micellar medium. The reaction was monitored spectrophotometrically by measuring the decreasing in absorbance of Rhodamine B at 554 nm with a fixedtime method..The limit of detection is 0.04 ng/ml Ru(III).The relative standard deviation of 5 and 10 ng/ml Ru(III) was 2.3 and 2.7 %, respectively. The method was applied to the determination of ruthenium in real water samples R Keywords—Ruthenium;Inhibitory; Rhodamine B; bromat

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.193.5849
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