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

Ayman H. Kamel, Abd El-Galil E. Amr, Nashwa S. Abdalla, Mohamed El-Naggar, Mohamed A. Al-Omar and Abdulrahman A. Almehizia
Additional contact information
Ayman H. Kamel: Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo 11566, Egypt
Abd El-Galil E. Amr: Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
Nashwa S. Abdalla: Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo 11566, Egypt
Mohamed El-Naggar: Chemistry Department, Faculty of Sciences, University of Sharjah, Sharjah 27272, UAE
Mohamed A. Al-Omar: Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
Abdulrahman A. Almehizia: Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia

IJERPH, 2020, vol. 17, issue 4, 1-12

Abstract: 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.

Keywords: diquat dibromide (DQ) solid-contact ISEs; poly(3,4-ethylenedioxythiophene) (PEDOT); screen-printed; molecularly imprinted polymers (MIPs); organic pollutant (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1660-4601/17/4/1138/pdf (application/pdf)
https://www.mdpi.com/1660-4601/17/4/1138/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:17:y:2020:i:4:p:1138-:d:319065

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().