Determination of Nickel(Ⅱ) in Isopropyl Alcohol-Ammonium Sulfate-PAN Aqueous Two-Phase Extraction System by Spectrophotometry

doi:DOI:10.3969/j.issn.1007-2985.2015.01.013

Abstract

Abstract: The distribution behavior of the association complex formed by the chelating agent PAN(1-(2-pyridineazo)-2-naphthol) with Ni²⁺ and Tween 80 was studied in the aqueous two-phase system between isopropyl alcohol and (NH₄)₂SO₄ solution.The results showed that the maximum absorption wavelength of associated complex was located at 562 nm which turned to the red shift of 97 nm compared with the mixture of PAN and alcohol solution.The linear range of the calibration curve was 0.10～0.60 mg/L,with the linear correlation coefficient being 0.999 2 and the apparent molar absorbance ε being 1.7×105 L·mol^-1·cm^-1.The interfering ions,such as lead(Ⅱ),zinc(Ⅱ),aluminum(Ⅲ),manganese(Ⅱ),molybdenum(Ⅵ),iron(Ⅲ),chromium (Ⅵ),and Ni(Ⅱ),were not extracted by the system,and the Ni(Ⅱ) was separated from the interfering ions mentioned above.

Key words: aqueous two-phase extraction, separation, Nickel, 1-(2-pyridine azo)-2-naphth, Tween 80

ZHANG Shu-Gui, SUN Sai-Lan, DONG Hong-Min, WANG Peng-Peng, LI You-Ji, QIN Shi-Dong. Determination of Nickel(Ⅱ) in Isopropyl Alcohol-Ammonium Sulfate-PAN Aqueous Two-Phase Extraction System by Spectrophotometry[J]. journal6, 2015, 36(1): 57-60.

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