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A novel high selective and sensitive para-nitrophenol voltammetric sensor, based on a molecularly imprinted polymer-carbon paste electrode |
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| Authors: | Taher Alizadeh Mohammad Reza Ganjali Parviz Norouzi Mashallah Zare |
| Institution: | a Department of Applied Chemistry, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran b Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran c Endocrinology & Metabolism Research Center, Medical Sciences/University of Tehran, Tehran, Iran |
| Abstract: | By using a molecularly imprinted polymer (MIP) as a recognition element, the design and construction of a high selective voltammetric sensor for para-nitrophenol was formed. Para-nitrophenol selective MIP and a non-imprinted polymer (NIP) were synthesized, and then used for carbon paste (CP) electrode preparation. The MIP-CP electrode showed greater recognition ability in comparison to the NIP-CP. It was shown that electrode washing after para-nitrophenol extraction led to enhanced selectivity, without noticeably decreasing the sensitivity. Some parameters affecting sensor response were optimized and a calibration curve was plotted. A dynamic linear range of 8 × 10−9 to 5 × 10−6 mol L−1 was obtained. The detection limit of the sensor was calculated as 3 × 10−9 mol L−1. Thus, this sensor was used successfully for the para-nitrophenol determination in different water samples. |
| Keywords: | Para-nitrophenol Molecularly imprinted polymer Voltammetric sensor Carbon paste electrode |
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