Study on Separation/Enrichment of Copper (II) Using Microcrystalline Phenolphthalein Loaded with Cupferron

Abstract:

The paper presents a novel method for the separation/enrichment of trace Cu²⁺ using microcrystalline phenolphthalein loaded with cupferron (Cup) prior to the determination by spectrophoto- metry. The effects of different parameters,such as the dosages of phenolphthalein and Cup and acidity on the enrichment yield of Cu²⁺ have been investigated to select the experimental conditions. The possible enrichment mechanism of Cu²⁺ was discussed.The results showed that under the optimum conditions, Cu²⁺ could be quantificationally adsorbed on the surface of microcrystalline phenolphthalein in the form of the chelate precipitate of Cu (Cup)₂ ,while Ni²⁺,Zn²⁺,Mn²⁺,Fe²⁺ and Al³⁺ could not be adsorbed at all.Therefore,Cu²⁺ was completely separated from the above metal ions in the solution. The quantitative separation/enrichment and determination of Cu²⁺ in various environmental water samples was performed, and the results agreed well with those obtained by FAAS method.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 456-460
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.456
• Online since: September 2013
• Authors: Xin Rong Wen, Chang Qing Tu
• Keywords: Copper(II), Cupferron, Environmental Water Samples, Phenolphthalein, Separation/Enrichment

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