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http://dx.doi.org/10.5012/jkcs.2010.54.3.283

Determination of Trace Amounts of Zirconium by Flotation - Spectrophotometric Method  

Pourreza, N. (Department of Chemistry, College of Science, Shahid Chamran University)
Parham, H. (Department of Chemistry, College of Science, Shahid Chamran University)
Shiri, S. (Department of Chemistry, College of Science, Shahid Chamran University)
Publication Information
Journal of the Korean Chemical Society / v.54, no.3, 2010 , pp. 283-286 More about this Journal
Abstract
A sensitive and reproducible method for the flotation-spectrophotometric determination of zirconium is reported. The method is based on the complex formation zirconium and xylenol orange (XO) which is floated in the interface of aqueous phase and n-hexane by vigorous shaking. By discarding the aqueous solution and n-hexane, the adsorbed complex on to the wall of a separating funnel was dissolved in a small volume of methanol solvent and its absorbance was measured at 429 nm. The effect of different parameters such as pH, concentrations of HCl, and XO, and volume of n-hexane flotation dissolvent, standing and shaking time were studied. The calibration curve was linear in the range of 7-120 ng $mL^{-1}$ of zirconium with a correlation coefficient of 0.9991. The limit of detection (LOD) was 5.8 ng $mL^{-1}$. The relative standard deviation (RSD) for seven replicate measurements of 50 and 110 ng $mL^{-1}$ of zirconium were 4.4 and 3.0%, respectively. The method was successfully applied to the determination of zirconium in water samples.
Keywords
Flotation-Spectrophotometry; Zirconium; Xylenol orange;
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Times Cited By KSCI : 1  (Citation Analysis)
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