【摘 要】
：
A new method of using phenolphthalein loaded with 1-(2-pyridylazo)-2-naphthol (PAN) as solid phase extractant to separate and enrich trace copper in diverse wat
【机 构】
：
The Key Laboratory of Environmental Pollution Control Technology of Henan Province
论文部分内容阅读
A new method of using phenolphthalein loaded with 1-(2-pyridylazo)-2-naphthol (PAN) as solid phase extractant to separate and enrich trace copper in diverse water samples has been developed. The effects of different parameters, such as the amounts of PAN and phenolphthalein, stirring time, various salts and metal ions on the enrichment yield of Cu(Ⅱ) have been investigated to select the experimental conditions. Under the optimum conditions, Cu(Ⅱ) can be totally adsorbed on the surface of microcrystalline phenolphthalein. By controlling appropriate acidity (pH=1.0), Cu(Ⅱ) is completely separated from Cd(Ⅱ), Pb(Ⅱ), Mn(Ⅱ), Co(Ⅱ), Fe(Ⅲ), Ni(Ⅱ), Al(Ⅲ), Zn(Ⅱ) and Hg(Ⅱ) in the solution. The possible reaction mechanism of the enrichment of copper is discussed in detail in this paper. The detection limit of this proposed method is found to be 0.03 μg·L-1 with the enrichment factor of 200. The recovery is in a range of 96.8%-105%. The standard deviation is less than 2.5%. The proposed method has been successfully applied to the determination of trace copper in different water samples with satisfactory results.
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