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Pre-concentration and separation of copper with water-soluble poly(vinyl alcohol) and acetone system prior to its spectrophotometric determination

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Abstract

A water-soluble poly(vinyl alcohol)–acetone system for the pre-concentration and separation of Cu2+in environmental water samples has been developed. First, poly(vinyl alcohol) (PVA) was able to complex with Cu2+, and the reaction product, the copper–PVA complex, was precipitated in excess acetone. Sequentially, the precipitate was separated by decantation and dissolved in a minimum amount of water. Finally, the copper ions were determined by the sodium diethyldithiocarbamate spectrophotometric method. Some related parameters that might affect the recovery of the copper were investigated in detail. Under the optimum experimental conditions, the detection limit is 0.014 µg mL−1 and the linearity range is from 0.025 to 3.00 µg mL−1. The relative standard deviation (n = 11) is 1.1%. The method was successfully applied to the analysis of copper in spring water, ground water, tap water, lake water and electroplating waste water. A possible mechanism of the method is also proposed.

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Authors and Affiliations

  1. School of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, 453007, China

    Zhike Wang, Zheng Fu & Cunling Ye

Authors
  1. Zhike Wang
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  2. Zheng Fu
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  3. Cunling Ye
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Correspondence to Zhike Wang.

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Wang, Z., Fu, Z. & Ye, C. Pre-concentration and separation of copper with water-soluble poly(vinyl alcohol) and acetone system prior to its spectrophotometric determination. Microchim Acta 165, 103–107 (2009). https://doi.org/10.1007/s00604-008-0105-3

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  • DOI: https://doi.org/10.1007/s00604-008-0105-3

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