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Graphene sheet-based electrochemical sensor with cationic surfactant for sensitive detection of atorvastatin. SENSORS INTERNATIONAL 2022. [DOI: 10.1016/j.sintl.2022.100198] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Bayraktepe DE, Yazan Z. Two‐layered Au@Ag Bimetallic Nanocomposites‐poly (L‐Met) Platform for Highly Sensitive Chlorpheniramine Maleate Detection. ELECTROANAL 2021. [DOI: 10.1002/elan.202100422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Zehra Yazan
- Ankara University Faculty of Science Department of Chemistry 06560 Ankara/ TURKEY
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Lewer J, Huang J, Peloquin J, Kostal J. Structure-Energetics-Property Relationships Support Computational Design of Photodegradable Pesticides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11713-11722. [PMID: 34428037 DOI: 10.1021/acs.est.1c02556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Development of high-performing pesticides with tunable degradation properties is vital to increasing the safety and effectiveness of tomorrow's analogs. Chromophoric dissolved organic matter in the excited triple state (3CDOM*) is known to play a key role in the removal of pesticides via indirect photodegradation. However, the potential of these transformations to guide the design of safer chemicals has not yet been fully realized. Here, we report a two-tier computational framework developed to probe and predict both kinetics and thermodynamics of 3CDOM*-pesticide interactions. In the first tier, robust in silico models were constructed by fitting free energies obtained from density functional theory (DFT) calculations to cell potentials and second-order rate constants for the 3CDOM*-pesticide electron transfer. In the second tier, Gibbs free energies and corresponding free energy barriers, determined in solution using the Marcus theory, were applied to develop a quick yet accurate screening approach based on the frontier molecular orbital (FMO) Theory. Being highly mechanistic and spanning ca. 1500 unique 3CDOM*-pesticide interactions, our approach is both robust and broadly applicable. To that end, the outcomes of our computational models were integrated into an easy-to-use decision framework that can guide structure-based design of less persistent pesticide analogs.
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Affiliation(s)
- Jessica Lewer
- Department of Chemistry, The George Washington University, 800 22nd St NW, Ste 4000, Washington, District of Columbia 20052-0066, United States
| | - Jessica Huang
- Department of Chemistry, The George Washington University, 800 22nd St NW, Ste 4000, Washington, District of Columbia 20052-0066, United States
| | - John Peloquin
- Department of Chemistry, The George Washington University, 800 22nd St NW, Ste 4000, Washington, District of Columbia 20052-0066, United States
| | - Jakub Kostal
- Department of Chemistry, The George Washington University, 800 22nd St NW, Ste 4000, Washington, District of Columbia 20052-0066, United States
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Abstract
This paper presents an accurate and fast electrochemical method for atorvastatin determination in pharmaceutical products. Two screen-printed sensors, one—carbon based (SPCE) and one based on carbon nanotubes and gold nanoparticles (AuNP-CNT/SPCE) were used during the electrochemical analyses. At all experimental stages, cyclic voltammetry was employed, both for the characterization of the sensors and their electrochemical behavior, and for quantitative determinations. AuNP-CNT/SPCE has showed an extended active area, higher intensity peaks, better reversibility and lower background current than the unmodified sensor. For atorvastatin quantification, a calibration curve has been developed within the 1.2–606.25 µM concentration range. A linearity relation between the current of the anodic peak and concentration has been obtained in the range 1.2–53.33 µMfor both sensors. With the AuNP-CNT/SPCE sensor, low values of limit of detection, LOD (1.92 × 10−7 M) and limit of quantification, LOQ (6.39 × 10−7 M) have been obtained, which demonstrates the feasibility of the method of determining atorvastatin from real samples. Atorvastatin amount has been successfully determined from pharmaceutical products using AuNP-CNT/SPCE. The results were similar to the manufacturer’s specifications regarding the dosage per tablet and to the concentrations obtained by applying the FTIR spectrometric method.
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Silva WA, de Almeida LG, Feiteira FN, Semaan FS, Aucélio RQ, Dornellas RM, Pacheco WF. Novel Electrochemical Determination of Atorvastatin by Monitoring the Suppression of a Lead Probe. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1773491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wanderson A. Silva
- Coordenação de Licenciatura em Física, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET-RJ), Petrópolis, Brazil
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
| | - Leonardo G. de Almeida
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
| | - Fernanda N. Feiteira
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
| | - Felipe S. Semaan
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
| | - Ricardo Q. Aucélio
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
| | - Rafael M. Dornellas
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
| | - Wagner F. Pacheco
- Programa de Pós-Graduação em Química, Universidade Federal Fluminense, Instituto de Química, Niterói, Brazil
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Yıldız C, Eskiköy Bayraktepe D, Yazan Z. Electrochemical low-level detection of l-tryptophan in human urine samples: use of pencil graphite leads as electrodes for a fast and cost-effective voltammetric method. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02620-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Antal I, Koneracka M, Zavisova V, Kubovcikova M, Kormosh Z, Kopcansky P. Statins Determination: A Review of Electrochemical Techniques. Crit Rev Anal Chem 2017; 47:474-489. [DOI: 10.1080/10408347.2017.1332973] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- I. Antal
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
- Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
| | - M. Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - V. Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - M. Kubovcikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - Zh. Kormosh
- Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
| | - P. Kopcansky
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
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McNeill K, Canonica S. Triplet state dissolved organic matter in aquatic photochemistry: reaction mechanisms, substrate scope, and photophysical properties. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2016; 18:1381-1399. [PMID: 27722628 DOI: 10.1039/c6em00408c] [Citation(s) in RCA: 237] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Excited triplet states of chromophoric dissolved organic matter (3CDOM*) play a major role among the reactive intermediates produced upon absorption of sunlight by surface waters. After more than two decades of research on the aquatic photochemistry of 3CDOM*, the need for improving the knowledge about the photophysical and photochemical properties of these elusive reactive species remains considerable. This critical review examines the efforts to date to characterize 3CDOM*. Information on 3CDOM* relies mainly on the use of probe compounds because of the difficulties associated with directly observing 3CDOM* using transient spectroscopic methods. Singlet molecular oxygen (1O2), which is a product of the reaction between 3CDOM* and dissolved oxygen, is probably the simplest indicator that can be used to estimate steady-state concentrations of 3CDOM*. There are two major modes of reaction of 3CDOM* with substrates, namely triplet energy transfer or oxidation (via electron transfer, proton-coupled electron transfer or related mechanisms). Organic molecules, including several environmental contaminants, that are susceptible to degradation by these two different reaction modes are reviewed. It is proposed that through the use of appropriate sets of probe compounds and model photosensitizers an improved estimation of the distribution of triplet energies and one-electron reduction potentials of 3CDOM* can be achieved.
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Affiliation(s)
- Kristopher McNeill
- Institute for Biogeochemistry and Pollutant Dynamics, ETH Zurich, Universitaetstrasse 16, 8092 Zurich, Switzerland.
| | - Silvio Canonica
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600 Dübendorf, Switzerland
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Sensitive and selective voltammetric determination of anti˗cancer agent shikonin on sepiolite clay/TiO 2 nanoparticle/MWCNTs composite carbon paste sensor and investigation of its electro˗oxidation mechanism. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.08.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ivić MLA, Petrović SD, Mijin DŽ. Contribution to the Recent Advances in Electrochemical Analysis of Pharmaceuticals. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/978-3-319-31849-3_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
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Kamalzadeh Z, Shahrokhian S. Electrochemical determination of atorvastatin on nano-scaled polypyrrole film. Bioelectrochemistry 2014; 98:1-10. [DOI: 10.1016/j.bioelechem.2014.01.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 01/17/2014] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
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