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Fiber-Optic Sensor for Iodine Based on a Covalently Immobilized Aminobenzanthrone Schiff Base

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Abstract

An aminobenzanthrone Schiff base has been synthesized as a new fluorescence carrier for the preparation of an optical chemical sensor for iodine. The response of the sensor is based on fluorescence quenching of the aminobenzanthrone Schiff base by iodine. The sensor shows a linear response toward iodine in the range of 1.0 × 10–5 to 1.0 × 10–3 mol l–1, with a detection limit of 6.0 × 10–6 mol l–1 at pH 8.0. Leaching of the fluorophore from the membrane is effectively hindered by covalent immobilization, resulting in an enhanced sensor lifetime. In addition to satisfactory reproducibility and reversibility, the prepared sensor exhibits sufficient selectivity toward iodine with respect to other coexisting ions. The sensor has been applied to the determination of iodine in common salt samples.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, P. R. China

    Li-Xin Chen, Zhi-Min Xie, You-Qian Long & Xin-Rong Song

  2. College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China

    Cheng-Gang Niu

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  1. Li-Xin Chen
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  2. Cheng-Gang Niu
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  3. Zhi-Min Xie
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  4. You-Qian Long
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Correspondence to Li-Xin Chen.

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Chen, LX., Niu, CG., Xie, ZM. et al. Fiber-Optic Sensor for Iodine Based on a Covalently Immobilized Aminobenzanthrone Schiff Base. ANAL. SCI. 22, 977–981 (2006). https://doi.org/10.2116/analsci.22.977

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  • DOI: https://doi.org/10.2116/analsci.22.977

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