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Loya M, Ghosh S, Atta AK. A review on dual detection of Cu2+ and Ni2+ ions by using single fluorometric and colorimetric organic molecular probes. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Abd-Rabboh HSM, E. Amr AEG, Almehizia AA, Naglah AM, H. Kamel A. New Potentiometric Screen-Printed Platforms Modified with Reduced Graphene Oxide and Based on Man-Made Imprinted Receptors for Caffeine Assessment. Polymers (Basel) 2022; 14:polym14101942. [PMID: 35631825 PMCID: PMC9145760 DOI: 10.3390/polym14101942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 11/29/2022] Open
Abstract
Caffeine is a psychoactive drug that is administered as a class II psychotropic substance. It is also considered a component of analgesics and cold medicines. Excessive intake of caffeine may lead to severe health damage or drug addiction problems. The assessment of normal caffeine consumption from abusive use is not conclusive, and the cut-off value for biological samples has not been established. Herein, new cost-effective and robust all-solid-state platforms based on potentiometric transduction were fabricated and successfully utilized for caffeine assessment. The platforms were modified with reduced graphene oxide (rGO). Tailored caffeine-imprinted polymeric beads (MIPs) based on methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA) were prepared, characterized, and used as recognition receptors in the presented potentiometric sensing devices. In 50 mM MES buffer, the sensors exhibited a slope response of 51.2 ± 0.9 mV/decade (n = 6, R2 = 0.997) over the linear range of 4.5 × 10−6−1.0 × 10−3 M with a detection limit of 3.0 × 10−6 M. They exhibited fast detection of caffeinium ions with less than 5 s response time (<5 s). The behavior of the presented sensors towards caffeinium ions over many common organic and inorganic cations was evaluated using the modified separate solution method (MSSM). Inter-day and intra-day precision for the presented analytical device was also evaluated. Successful applications of the presented caffeine sensors for caffeine determination in commercial tea and coffee and different pharmaceutical formulations were carried out. The data obtained were compared with those obtained by the standard liquid chromatographic approach. The presented analytical device can be considered an attractive tool for caffeine determination because of its affordability and vast availability, particularly when combined with potentiometric detection.
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Affiliation(s)
- Hisham S. M. Abd-Rabboh
- Chemistry Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;
- Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
| | - Abdel El-Galil E. Amr
- Pharmaceutical Chemistry Department, College of Pharmacy, Drug Exploration and Development Chair (DEDC), King Saud University, Riyadh 11451, Saudi Arabia; (A.A.A.); (A.M.N.)
- Applied Organic Chemistry Department, National Research Center, Dokki, Giza 12622, Egypt
- Correspondence: (A.E.-G.E.A.); or (A.H.K.)
| | - Abdulrahman A. Almehizia
- Pharmaceutical Chemistry Department, College of Pharmacy, Drug Exploration and Development Chair (DEDC), King Saud University, Riyadh 11451, Saudi Arabia; (A.A.A.); (A.M.N.)
| | - Ahmed M. Naglah
- Pharmaceutical Chemistry Department, College of Pharmacy, Drug Exploration and Development Chair (DEDC), King Saud University, Riyadh 11451, Saudi Arabia; (A.A.A.); (A.M.N.)
- Applied Organic Chemistry Department, National Research Center, Dokki, Giza 12622, Egypt
| | - Ayman H. Kamel
- Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
- Chemistry Department, College of Science, Sakhir 32038, Bahrain
- Correspondence: (A.E.-G.E.A.); or (A.H.K.)
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Rapid and Accurate Validated Potentiometric Method for Bispyribac Herbicide Assessment in Rice and Agricultural Wastewater. WATER 2020. [DOI: 10.3390/w12082216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A new validated method based on potentiometric transduction for bispyribac herbicide assessment in commercial formulations, rice and wastewater samples is fabricated and characterized. Sensors are based in terms of their fabrication on tridodecyl methyl ammonium chloride (TDMAC) as recognition material. TDMAC was plasticized in a poly (vinyl chloride) (PVC) matrix to prepare the membrane. Under static modes of operation, the sensors revealed a Nernstian anionic slope of −63.6 ± 0.7 mV/decade within a linear range of 9.1 × 10−6–1.0 × 10−2 in 50 mM phosphate buffer solution (PBS), pH7. The detection limit was 6.0 × 10−6 M. The sensor was successfully introduced in a flow-stream system revealing a Nernstian response of −53.8 ± 1.3 mV/decade over a linear range of 2 × 10−4–1.0 × 10−2 M and lower detection limit of 5.6 × 10⁻⁵ M. The sampling rate was calculated to be (~42 sample/h). Validation of the assay method is presented in detail including accuracy, trueness, bias, between-day variability and within-day variability, and good performance characteristics of the method are obtained. The presented method was successfully introduced to bispyribac determination in different complex matrices such as commercial bispyribac sodium known as (Nominee-kz, 3% soluble liquid (SL)), rice samples and agricultural wastewater samples. The samples were analyzed successfully under both static and hydrodynamic modes of operation. The results obtained were in a good agreement with those obtained by the liquid chromatographic method.
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E Amr AEG, Al-Omar MA, H Kamel A, A Elsayed E. Single-Piece Solid Contact Cu 2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore. Molecules 2019; 24:molecules24050920. [PMID: 30845715 PMCID: PMC6429070 DOI: 10.3390/molecules24050920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/12/2019] [Accepted: 02/20/2019] [Indexed: 11/16/2022] Open
Abstract
Herein, a facile route leading to good single-walled carbon nanotubes (SWCNT) dispersion or poly (3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) based single-piece nanocomposite membrane is proposed for trace determination of Cu2+ ions. The single-piece solid contact Cu2+-selective electrodes were prepared after drop casting the membrane mixture on the glassy-carbon substrates. The prepared potentiometric sensors revealed a Nernstian response slope of 27.8 ± 0.3 and 28.1 ± 0.4 mV/decade over the linearity range 1.0 × 10-3 to 2.0 × 10-9 and 1.0 × 10-3 to 1.0 × 10-9 M with detection limits of 5.4 × 10-10 and 5.0 × 10-10 M for sensors based on SWCNTs and PEDOT/PSS, respectively. Excellent long-term potential stability and high hydrophobicity of the nanocomposite membrane are recorded for the prepared sensors due to the inherent high capacitance of SWCNT used as a solid contact material. The sensors exhibited high selectivity for Cu2+ ions at pH 4.5 over other common ions. The sensors were applied for Cu2+ assessment in tap water and different tea samples. The proposed sensors were robust, reliable and considered as appealing sensors for copper (II) detection in different complex matrices.
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Affiliation(s)
- Abd El-Galil E Amr
- Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
- Applied Organic Chemistry Department, National Research Centre, Dokki, Cairo 12622, Egypt.
| | - Mohamed A Al-Omar
- Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Ayman H Kamel
- Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo 11566, Egypt.
| | - Elsayed A Elsayed
- Zoology Department, Bioproducts Research Chair, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia.
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Cairo 12622, Egypt.
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Mahanty B, Satpati A, Mohapatra P. Development of a potentiometric sensor for europium(III) based on N, N, N′, N′-tetraoctyldiglycolamide (TODGA) as the ionophore. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.11.072] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pazik A, Kamińska B, Skwierawska A, Nakonieczna S, Ossowski T. Synthesis and properties of new N,N′-phenyltetrazole podand. CHEMICAL PAPERS 2016. [DOI: 10.1515/chempap-2015-0209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe synthesis of a new chromogenic N,N′-phenyltetrazole receptor is reported here. The cationbinding properties of this receptor in solution were investigated by naked-eye colour change, electrochemical methods and UV-Vis spectroscopy in various solvents (CH
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