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Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (5): 599.

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Determination of Fe, Co and Ni in Their Chelates with IAP-4S by Ion-Pair Reversed-Phase High-Performance Liquid Chromatography

LIN Chang-shan1, ZHANG Xiao-song1, LIU Xue-zhu1, FENG Jian-zhang2, TONG Shen-yang2   

  1. 1. Dept.of Applied Chem., University of Science and Technology of China, Hefei, 230026;
    2. Department of Chemistry, Peking University, Beijing
  • Received:1991-04-12 Online:1992-05-24 Published:1992-05-24

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Abstract: The chelates of iron, cobalt and nickel with 2-(2-imidazolylazo)-phenol-4-sulphonic acid IAP-4Swere separated on a column (250×4 mm) of Nucleosil C18(5μm) with a mobile phase (0.7 mL/min) of methanol-water (30:70, V/V) containing 0.01 mol/L KH2PO4-Na2HPO4 buffer (pH 7.5) and 2×10-3 mol/Ltetrabutyl ammonium bromide, and were detected at 550 nm.The calibration graphs are rectilinear from 0.1～5 ppm for iron, 0.05～5 ppm for both cobalt and nickel.The detection limits are 0.25 ng for iron, 0.16 ng for both cobalt and nickel.The method was applied to the analysis of real samples.

Key words: Determination of iron, cobalt and nickel, 2-(2-imidazolylazo)-phenol-4-suIphonic acid, Nickel ore

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