A New Reagent Immobilization Method for a Portable Fiber Optic Probe for Determination of Ferrous Ions.

  • LIU Xue-mei
    Institute of Hygiene and Environmental Medicine of Tianjin
  • XING Wan-li
    Institute of Hygiene and Environmental Medicine of Tianjin
  • OU Guo-rong
    Institute of Hygiene and Environmental Medicine of Tianjin
  • LIANG Jun
    Institute of Hygiene and Environmental Medicine of Tianjin

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  • New Reagent Immobilization Method for a Portable Fiber Optic Probe for Determination of Ferrous Ions

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Abstract

An absorbance-based optic fiber probe for determination of ferrous ions is described. It is based on 4,7-diphenyl-1,10-phenanthroline as a sensitive reagent which was immobilized on polymethylmethacrylate (PMMA) using a new immobilization method. The proposed probe responded linearly to the Fe2+ concentration in the range of 0.03 - 1.0 mg l-1. The response time required to reach a stable signal was short (less than 10 min). The probe exhibited pH and temperature independence, small ion interference, good selectivity, reproducibility and stability. It was applied for direct analysis of Fe2+ ions in natural water. The results were comparable to those obtained by a conventional spectrophotometric method. The results of recovery tests were also satisfactory.

Journal

  • Analytical Sciences

    Analytical Sciences 16 (5), 473-476, 2000

    The Japan Society for Analytical Chemistry

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