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Article

Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment

by
Samar Ezzat
1,2,
Mona A. Ahmed
2,
Abd El-Galil E. Amr
3,4,*,
Mohamed A. Al-Omar
3,
Ayman H. Kamel
1 and
Nagy M. Khalifa
3,4
1
Department of Chemistry, Faculty of Science, Ain Shams University, 11566 Cairo, Egypt
2
Chemistry Department, College for Women, Ain Shams University, Heliopolis, 11751 Cairo, Egypt
3
Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
4
Applied Organic Chemistry Department, National Research Center, 12622 Giza, Egypt
*
Author to whom correspondence should be addressed.
Materials 2019, 12(18), 2924; https://doi.org/10.3390/ma12182924
Submission received: 11 August 2019 / Revised: 2 September 2019 / Accepted: 3 September 2019 / Published: 10 September 2019
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Abstract

A novel single-piece all-solid-state ion-selective electrode (SC/ISE) based on carbon-screen printed is introduced. Polyaniline (PANI) is dissolved in a membrane cocktail that contains the same components used for making a conventional ion-selective polyvinyl chloride (PVC) matrix membrane. The membrane, having the PANI, is directly drop-casted on a carbon substrate (screen-printed-carbon electrode). PANI was added to act as an intermediary between the substrate and the membrane for the charge transfer process. Under non-equilibrium sensing mechanism, the sensors revealed high sensitivity towards 2,4-dichlorophenol (DCP) over the linearity range 0.47 to 13 µM and a detection limit 0.13 µm. The selectivity was measured by the modified separate solution method (MSSM) and showed good selectivity towards 2,4-DCP over the most commonly studied ions. All measurements were done in 30 mm Tris buffer solution at a pH 5.0. Using constant-current chronopotentiometry, the potential drift for the proposed electrodes was checked. Improvement in the potential stability of the SPE was observed after the addition of PANI in the sensing membrane as compared to the corresponding coated-wire electrode (membrane without PANI). The applicability of the sensor has been checked by measuring 2,4-DCP in different water samples and the results were compared with the standard HPLC method.
Keywords: solid-contact ISEs; molecularly imprinted polymers (MIPs); chlorophenols; 2,4-dichlorophenol; neutral response mechanism. solid-contact ISEs; molecularly imprinted polymers (MIPs); chlorophenols; 2,4-dichlorophenol; neutral response mechanism.

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MDPI and ACS Style

Ezzat, S.; A. Ahmed, M.; E. Amr, A.E.-G.; A. Al-Omar, M.; H. Kamel, A.; Khalifa, N.M. Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment. Materials 2019, 12, 2924. https://doi.org/10.3390/ma12182924

AMA Style

Ezzat S, A. Ahmed M, E. Amr AE-G, A. Al-Omar M, H. Kamel A, Khalifa NM. Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment. Materials. 2019; 12(18):2924. https://doi.org/10.3390/ma12182924

Chicago/Turabian Style

Ezzat, Samar, Mona A. Ahmed, Abd El-Galil E. Amr, Mohamed A. Al-Omar, Ayman H. Kamel, and Nagy M. Khalifa. 2019. "Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment" Materials 12, no. 18: 2924. https://doi.org/10.3390/ma12182924

APA Style

Ezzat, S., A. Ahmed, M., E. Amr, A. E.-G., A. Al-Omar, M., H. Kamel, A., & Khalifa, N. M. (2019). Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment. Materials, 12(18), 2924. https://doi.org/10.3390/ma12182924

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