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Electrochemical sensor for 2,4-dichlorophenoxy acetic acid using molecularly imprinted polypyrrole membrane as recognition element

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Abstract

An electrochemical sensor based on molecularly imprinted polypyrrole membranes is reported for the determination of 2,4-dichlorophenoxy acetic acid (2,4-D). The sensor was prepared by electropolymerization of pyrrole on a glassy carbon electrode in the presence of 2,4-D as a template. The template was removed by overoxidation at +1.3 V in buffer solution. The sensor can effectively improve the reductive properties of 2,4-D and eliminate interferences by other pesticides and electroactive species. The peak current at -0.78 V is linear with the concentration of 2,4-D from 1.0 to 10 µM, the detection limit is 0.83 µM (at 3σ), and the relative standard deviation is 3.9% (at 5.0 µM of 2,4-D; n = 7). The method has been successfully applied to the determination of 2,4-D in environmental water samples, with recovery rates ranging from 92% to 108%.

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Acknowledgment

This work was supported by the National Natural Science Foundation of China (No. 20875070).

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Authors and Affiliations

  1. Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, Department of Chemistry and Life Science, West Anhui University, Anhui, Lu’an, 237012, People’s Republic of China

    Chenggen Xie, Shan Gao, Qingbao Guo & Ke Xu

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  1. Chenggen Xie
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  2. Shan Gao
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  3. Qingbao Guo
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Correspondence to Chenggen Xie.

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Xie, C., Gao, S., Guo, Q. et al. Electrochemical sensor for 2,4-dichlorophenoxy acetic acid using molecularly imprinted polypyrrole membrane as recognition element. Microchim Acta 169, 145–152 (2010). https://doi.org/10.1007/s00604-010-0303-7

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  • DOI: https://doi.org/10.1007/s00604-010-0303-7

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