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Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination

Screen-printed platforms integrated with molecularly imprinted polymers (MIP) were fabricated and characterized as potentiometric sensors for diquat (DQ). The synthesized MIP beads were studied as sensory carriers in plasticized poly(vinyl chloride) membranes. The sensors were constructed by using p...

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Autores principales: Kamel, Ayman H., Amr, Abd El-Galil E., Abdalla, Nashwa S., El-Naggar, Mohamed, Al-Omar, Mohamed A., Almehizia, Abdulrahman A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7068347/
https://www.ncbi.nlm.nih.gov/pubmed/32053930
http://dx.doi.org/10.3390/ijerph17041138
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author Kamel, Ayman H.
Amr, Abd El-Galil E.
Abdalla, Nashwa S.
El-Naggar, Mohamed
Al-Omar, Mohamed A.
Almehizia, Abdulrahman A.
author_facet Kamel, Ayman H.
Amr, Abd El-Galil E.
Abdalla, Nashwa S.
El-Naggar, Mohamed
Al-Omar, Mohamed A.
Almehizia, Abdulrahman A.
author_sort Kamel, Ayman H.
collection PubMed
description Screen-printed platforms integrated with molecularly imprinted polymers (MIP) were fabricated and characterized as potentiometric sensors for diquat (DQ). The synthesized MIP beads were studied as sensory carriers in plasticized poly(vinyl chloride) membranes. The sensors were constructed by using poly(3,4-ethylenedioxythiophene) (PEDOT) as solid-contact material to diminish charge-transfer resistance and water layer potential. Conventional ion-selective electrodes (ISEs) with internal filling solution were used for comparison. The designed electrodes showed near Nernstian slopes of 28.2 ± 0.7 (r² = 0.999) over the concentration range of 1.0 × 10(−6)–1.0 × 10(−2) M with the limit of detection 0.026 µg/mL over the pH range 4.2–9.0. The electrode exhibited good selectivity for diquat cations over a large number of organic and inorganic cations. The sensor was successfully introduced for direct measurement of diquat content in commercial pesticide preparations and different spiked potato samples. The results showed that the proposed electrode has a fast and stable response, good reproducibility, and applicability for direct assessment of diquat content. The proposed potentiometric method is simple and accurate in comparison with the reported HPLC methods. Besides, it is applicable to turbid and colored sample solutions.
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spelling pubmed-70683472020-03-19 Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination Kamel, Ayman H. Amr, Abd El-Galil E. Abdalla, Nashwa S. El-Naggar, Mohamed Al-Omar, Mohamed A. Almehizia, Abdulrahman A. Int J Environ Res Public Health Article Screen-printed platforms integrated with molecularly imprinted polymers (MIP) were fabricated and characterized as potentiometric sensors for diquat (DQ). The synthesized MIP beads were studied as sensory carriers in plasticized poly(vinyl chloride) membranes. The sensors were constructed by using poly(3,4-ethylenedioxythiophene) (PEDOT) as solid-contact material to diminish charge-transfer resistance and water layer potential. Conventional ion-selective electrodes (ISEs) with internal filling solution were used for comparison. The designed electrodes showed near Nernstian slopes of 28.2 ± 0.7 (r² = 0.999) over the concentration range of 1.0 × 10(−6)–1.0 × 10(−2) M with the limit of detection 0.026 µg/mL over the pH range 4.2–9.0. The electrode exhibited good selectivity for diquat cations over a large number of organic and inorganic cations. The sensor was successfully introduced for direct measurement of diquat content in commercial pesticide preparations and different spiked potato samples. The results showed that the proposed electrode has a fast and stable response, good reproducibility, and applicability for direct assessment of diquat content. The proposed potentiometric method is simple and accurate in comparison with the reported HPLC methods. Besides, it is applicable to turbid and colored sample solutions. MDPI 2020-02-11 2020-02 /pmc/articles/PMC7068347/ /pubmed/32053930 http://dx.doi.org/10.3390/ijerph17041138 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kamel, Ayman H.
Amr, Abd El-Galil E.
Abdalla, Nashwa S.
El-Naggar, Mohamed
Al-Omar, Mohamed A.
Almehizia, Abdulrahman A.
Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title_full Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title_fullStr Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title_full_unstemmed Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title_short Modified Screen-Printed Potentiometric Sensors based on Man-Tailored Biomimetics for Diquat Herbicide Determination
title_sort modified screen-printed potentiometric sensors based on man-tailored biomimetics for diquat herbicide determination
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7068347/
https://www.ncbi.nlm.nih.gov/pubmed/32053930
http://dx.doi.org/10.3390/ijerph17041138
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