期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 112, 期 -, 页码 116-124出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2013.04.044
关键词
Fluorescent sensor; Fe3+; Naphthalimide derivative; Covalent immobilization; Fluorescence quenching
类别
资金
- High-level Talent Projection for North China University of Water Resources and Electric Power [40334]
- Doctoral Research Fund of Henan Chinese Medicine [BSJJ2009-27]
- Key Science and Technology Programme of Henan Province [112PPTSF319-11]
- Program for Innovative Culture Research Team (in Science and Technology) in Henan College of Chinese Medicine
- Henan Natural Science Foundation of Education Department [2011B360005, 2009A350003]
In this paper, the fabrication and analytical characteristics of fluorescence-based ferric ion-sensing glass slides were described. To fabricate the sensor, a naphthalimide derivative (compound 1) with a terminal double bond was synthesized and copolymerized with 2-hydroxyethyl methacrylate (HEMA) on the activated surface of glass slides by UV irradiation. Upon the addition of Fe3+ in 0.05 mol/L Tris/HCI (pH 6.02) at 25 degrees C, the fluorescence intensity of the resulting optical sensor decrease, which has been utilized as the basis for the selective detection of Fe3+. The sensor can be applied to the quantification of Fe3+ with a linear range covering form 1.0 x 10(-5) to 1.0 x 10(-3) M and a detection limit of 4.5 x 10(-6) M. The experiment results show that the response behavior of the sensor to Fe3+ is pH-independent in medium condition (pH 5.00-8.00) and exhibits high selectivity for Fe3+ over a large number of cations such as alkali, alkaline earth and transitional metal ions. Moreover, satisfactory reproducibility, reversibility and a rapid response were realized. The sensing membrane was found to have a lifetime at least 2 months. The accuracy and the precision of the method were evaluated by the analysis of the standard reference material, iron in water (1.0 mol/L HNO3). The developed sensor is applied for the determination of iron in pharmaceutical preparation samples with satisfactory results. (C) 2013 Elsevier B.V. All rights reserved.
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