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A 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.

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Authors and Affiliations

  1. Institute of Hygiene and Environmental Medicine of Tianjin Dali Road #1, Tianjin, 300050, P. R. China

    Xue-mei Liu, Wan-li Xing, Guo-rong Ou & Jun Liang

Authors
  1. Xue-mei Liu
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  2. Wan-li Xing
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  3. Guo-rong Ou
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  4. Jun Liang
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Liu, Xm., Xing, Wl., Ou, Gr. et al. A New Reagent Immobilization Method for a Portable Fiber Optic Probe for Determination of Ferrous Ions. ANAL. SCI. 16, 473–476 (2000). https://doi.org/10.2116/analsci.16.473

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  • DOI: https://doi.org/10.2116/analsci.16.473

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