Original scientific paper

Complexation between Antimony and o-Chlorophenylfluorone and its Application to Determination of Antimony in Wastewater

Lu-Ting Pan ; State Key Laboratory of Pollution Control and Resource Reuse Research, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China
Xiang-Hu Liu ; State Key Laboratory of Pollution Control and Resource Reuse Research, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China
Tian Li ; State Key Laboratory of Pollution Control and Resource Reuse Research, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China
Jian-Wei Fan ; State Key Laboratory of Pollution Control and Resource Reuse Research, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China

Abstract

The formation of a chelate complex of antimony(III) with o-chlorophenylfluorone (CPF) was used for the spectrophotometric determination of antimony. The spectral correction technique was applied to characterize the complexation and the determination of SbIII. Results have shown that complex Sb(CPF)₂H₂O was formed and its stepwise stability constants were determined to be logK₁ = 6.44 andlogK₂ = 5.81.The molar absorptivities of the complex at pH = 4.5 and at 540 nm were ε₁ = 1.38×104 andε₂ = 3.46×104 dm3 mol–1 cm–1. The method is characterised by selectivity in the presence of the mixture of thiourea, triethanolamine and ethylenebis(oxyethylenenitrilo)-tetraacetic acid. The limit of detection is 0.03 µg cm–3 of SbIII. Analysis of wastewater samples was performed with satisfactory results.

Keywords

spectral correction technique; o-chlorophenylfluorone, spectrophotometry; determination of antimony; wastewater

Hrčak ID:

45454

URI

https://hrcak.srce.hr/45454

Publication date:

11.12.2009.

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