Abstract:

In this study, a solid phase extraction method has been developed for the preconcentration of Zn(II) at trace level using β-cyclodextrin polymer modified with 1-(2-Pyridylazo)-2-Naphthol (PAN) reagent. After preconcentration, metal retained on the polymer was eluted with 5.0 mL of 2.0M HCl and then determined by UV-VIS spectrophotometry. The factors affecting the preconcentration of the Zn(II) such as pH, concentration of the eluent, eluent volume and matrix components were also ascertained. The recovery of Zn(II) was found to be ≥ 95% and preconcentration factor was found to be 70. The relative standard deviation of the method was 1.0%. The analytical detection limit was found to be 2.06 ng/mL.The proposed method has been applied for the determination of Zn(II) in different water samples and certified alloy samples.   Keywords:β-cyclodextrin polymer, Zn(II), preconcentration, 1-(2-Pyridylazo)-2-Naphthol

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