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Pesakova V, Brozmanova H, Sistik P, Kusnirikova Z, Kacirova I, Grundmann M. Liquid chromatography-tandem mass spectrometry method for determination of total and free teriflunomide concentration in serum of patients with multiple sclerosis. J Pharm Biomed Anal 2023; 224:115173. [PMID: 36446260 DOI: 10.1016/j.jpba.2022.115173] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/08/2022] [Accepted: 11/16/2022] [Indexed: 11/18/2022]
Abstract
Teriflunomide belongs to disease-modifying drugs and is used in treatment of multiple sclerosis. According to in vitro studies more than 99.4 % of drug is binding to plasma proteins and only less than 1 % is free for clinical activity. The rapid and simple ultra-performance liquid chromatography-tandem mass spectrometry method (UPLC-MS/MS) was developed and validated for determination of total and free teriflunomide (TFM) in serum of patients with multiple sclerosis. To determine the total teriflunomide samples were precipitated with a precipitation reagent consisting of 11 % solution of ZnSO4 in acetonitrile/methanol (40:60, v/v). To determine the free fraction of teriflunomide, an ultracentrifugation method was used. The analysis was performed on a UPLC system connected to a XEVO TQ-XS mass spectrometer. Chromatographic separation was carried out on an Acquity UPLC BEH C18 1.7 µm (100 × 2.1 mm) column heated to 30 °C and teriflunomide-D4 was used as an internal standard. Ionization was performed by electrospray in negative ion mode. The developed methods were validated according to the rules of the European Medicines Agency (EMA) for the analytical method validation of bioanalytical methods. The coefficients of variation were in the range of 0.53-14.84 % and the recovery 97.92-108.33 %, respectively. Share of free teriflunomide was 0.15-0.40 % (mean 0.25 ± 0.05 %) of total teriflunomide and there was a significant correlation between free and total teriflunomide r2 = 0.9083 (p < 0.0001). This newly developed method allows the rapid and easy determination of the teriflunomide concentration with high sensitivity and can be applied to clinical samples of patients with multiple sclerosis.
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Affiliation(s)
- Veronika Pesakova
- Department of Clinical Neurosciences, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Clinical Pharmacology, Institute of Laboratory Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic.
| | - Hana Brozmanova
- Department of Clinical Pharmacology, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Clinical Pharmacology, Institute of Laboratory Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic
| | - Pavel Sistik
- Department of Clinical Pharmacology, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Clinical Pharmacology, Institute of Laboratory Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic
| | - Zuzana Kusnirikova
- Department of Clinical Neurosciences, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Children Neurology, Department of Neurology, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic
| | - Ivana Kacirova
- Department of Clinical Pharmacology, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Clinical Pharmacology, Institute of Laboratory Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic
| | - Milan Grundmann
- Department of Clinical Pharmacology, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic; Department of Clinical Pharmacology, Institute of Laboratory Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava, Czech Republic
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Çorman ME, Cetinkaya A, Armutcu C, Bellur Atici E, Uzun L, Ozkan SA. A sensitive and selective electrochemical sensor based on molecularly imprinted polymer for the assay of teriflunomide. Talanta 2022; 249:123689. [PMID: 35717750 DOI: 10.1016/j.talanta.2022.123689] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/09/2022] [Accepted: 06/12/2022] [Indexed: 11/29/2022]
Abstract
In this work, pyrrole-histidine has been designed, synthesized and, used as a novel functional monomer to fabricate a molecularly imprinted electrochemical sensor for the selective and sensitive detection of teriflunomide (TER). The molecularly imprinted thin film of electrochemical sensor was constructed by directly electropolymerization of co-polymer of pyrrole-histidine (PyHis) with pyrrole in the presence of a template, TER, on a glassy carbon electrode (GCE). After electropolymerization, the structure and morphology of the fabricated MIP sensor were characterized by Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) and its electrochemical parameters such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS). The poly (pyrrole-co-pyrrole-histidine) [Poly (Py-co-PyHis)]@MIP/GCE sensor have a linear TER concentration in the of 0.1-1.0 pM with a low detection limit of 11.38 fM. The present strategy for electrochemical sensor have been also showed excellent recovery in synthetic serum samples and tablet dosage form with the recoveries 97.56% and 100.35%, respectively. The developed [Poly (Py-co-PyHis)]@MIP/GCE sensor exhibited an excellent electrochemical response for TER due to the synergistic effect of conducting polymer and molecularly imprinting techniques.
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Affiliation(s)
- M Emin Çorman
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, Ankara, Turkey; University of Health Sciences, Gülhane Faculty of Pharmacy, Department of Biochemistry, Ankara, Turkey
| | - Ahmet Cetinkaya
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, Ankara, Turkey
| | - Canan Armutcu
- Hacettepe University, Faculty of Science, Department of Chemistry, Ankara, Turkey
| | | | - Lokman Uzun
- Hacettepe University, Faculty of Science, Department of Chemistry, Ankara, Turkey
| | - Sibel A Ozkan
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, Ankara, Turkey.
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Garg S, Kumar P, Greene GW, Mishra V, Avisar D, Sharma RS, Dumée LF. Nano-enabled sensing of per-/poly-fluoroalkyl substances (PFAS) from aqueous systems - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 308:114655. [PMID: 35131704 DOI: 10.1016/j.jenvman.2022.114655] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/01/2022] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Per-/poly-fluoroalkyl substances (PFAS) are an emerging class of environmental contaminants used as an additive across various commodity and fire-retardant products, for their unique thermo-chemical stability, and to alter their surface properties towards selective liquid repellence. These properties also make PFAS highly persistent and mobile across various environmental compartments, leading to bioaccumulation, and causing acute ecotoxicity at all trophic levels particularly to human populations, thus increasing the need for monitoring at their repositories or usage sites. In this review, current nano-enabled methods towards PFAS sensing and its monitoring in wastewater are critically discussed and benchmarked against conventional detection methods. The discussion correlates the materials' properties to the sensitivity, responsiveness, and reproducibility of the sensing performance for nano-enabled sensors in currently explored electrochemical, spectrophotometric, colorimetric, optical, fluorometric, and biochemical with limits of detection of 1.02 × 10-6 μg/L, 2.8 μg/L, 1 μg/L, 0.13 μg/L, 6.0 × 10-5 μg/L, and 4.141 × 10-7 μg/L respectively. The cost-effectiveness of sensing platforms plays an important role in the on-site analysis success and upscalability of nano-enabled sensors. Environmental monitoring of PFAS is a step closer to PFAS remediation. Electrochemical and biosensing methods have proven to be the most reliable tools for future PFAS sensing endeavors with very promising detection limits in an aqueous matrix, short detection times, and ease of fabrication.
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Affiliation(s)
- Shafali Garg
- University of Delhi, Bioresources and Environmental Biotechnology Laboratory, Department of Environmental Studies, India
| | - Pankaj Kumar
- University of Delhi, Bioresources and Environmental Biotechnology Laboratory, Department of Environmental Studies, India
| | - George W Greene
- Deakin University, Institute for Frontier Materials, Burwood, Melbourne, Victoria, Australia
| | - Vandana Mishra
- University of Delhi, Bioresources and Environmental Biotechnology Laboratory, Department of Environmental Studies, India; University of Delhi, Delhi School of Climate Change and Sustainability, Institute of Eminence, Delhi, 110007, India
| | - Dror Avisar
- Tel Aviv University, School for Environmental and Earth Sciences, Water Research Center, Tel Aviv, Israel
| | - Radhey Shyam Sharma
- University of Delhi, Bioresources and Environmental Biotechnology Laboratory, Department of Environmental Studies, India; University of Delhi, Delhi School of Climate Change and Sustainability, Institute of Eminence, Delhi, 110007, India.
| | - Ludovic F Dumée
- Khalifa University, Department of Chemical Engineering, Abu Dhabi, United Arab Emirates; Khalifa University, Center for Membrane and Advanced Water Technology, Abu Dhabi, United Arab Emirates; Khalifa University, Research and Innovation Center on CO(2) and Hydrogen, Abu Dhabi, United Arab Emirates.
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Tasić ŽZ, Mihajlović MBP, Radovanović MB, Simonović AT, Medić DV, Antonijević MM. Electrochemical determination of L-tryptophan in food samples on graphite electrode prepared from waste batteries. Sci Rep 2022; 12:5469. [PMID: 35361843 PMCID: PMC8971531 DOI: 10.1038/s41598-022-09472-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 03/17/2022] [Indexed: 11/19/2022] Open
Abstract
One of the goals of this research was to develop an electrochemical sensor that had the ability to determine the target analyte and was both cheap and non-toxic. Another goal was to influence the reduction of electronic waste. In accordance with these, a graphite rod from zinc-carbon batteries was used to prepare an electrochemical sensor for the determination of L-tryptophan in Britton–Robinson buffer solution. Two electrochemical methods were used in the experimental research, differential pulse voltammetry and cyclic voltammetry. The effect of different parameters, including the pH value of supporting solution, scan rate, as well as the concentration of L-tryptophan on the current response, was studied. The pH value of Britton–Robinson buffer influenced the intensity of L-tryptophan oxidation peak, as well as the peak potential. The intensity of the current response was the highest at pH 4.0, while the peak potential value became lower as the pH increased, indicating that protons also participated in the redox reaction. Based on the obtained data, electrochemical oxidation of L-tryptophan at the graphite electrode was irreversible, two electron/two proton reaction. In addition, it was observed that the oxidation peak increased as the scan rate increased. According to the obtained electrochemical data, it was suggested that the oxidation of L-tryptophan was mixed controlled by adsorption and diffusion. The linear correlation between oxidation peak and L-tryptophan concentration was investigated in the range 5.0–150.0 µM and the obtained values of limit of detection and limit of quantification were 1.73 µM and 5.78 µM, respectively. Also, the prepared electrochemical sensor was successful in determination of target analyte in milk and apple juice samples.
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Affiliation(s)
- Žaklina Z Tasić
- Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia.
| | | | - Milan B Radovanović
- Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia
| | - Ana T Simonović
- Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia
| | - Dragana V Medić
- Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia
| | - Milan M Antonijević
- Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia
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Electrochemical analysis of flubendiamide in water and white rice using clay microparticles supported on pencil electrode. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106486] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Jin S, Kim J, Kim D, Park JW, Chang S. Electrolytic C–H Oxygenation via Oxidatively Induced Reductive Elimination in Rh Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01670] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Seongho Jin
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jinwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jung-Woo Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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A review on graphene-based electrochemical sensor for mycotoxins detection. Food Chem Toxicol 2020; 148:111931. [PMID: 33340616 DOI: 10.1016/j.fct.2020.111931] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/21/2020] [Accepted: 12/12/2020] [Indexed: 12/21/2022]
Abstract
This work focuses on the study of nanomaterial-based sensors for mycotoxins detection. Due to their adverse effects on humans and animals, mycotoxins are heavily regulated, and the foodstuff and feed stocks with a high probability of being contaminated are often analyzed. In this context, the recent developments in graphene-based electrochemical sensors for mycotoxins detection were examined. The mycotoxins' toxicity implications on their detection and the development of diverse recognition elements are described considering the current challenges and limitations.
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Dinesh M, Muthumalai K, Haldorai Y, Thangavelu Rajendra Kumar R. MoS
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Nanosheets Decorated Multi‐walled Carbon Nanotube Composite Electrocatalyst for 4‐Nitrophenol Detection and Hydrogen Evolution Reaction. ELECTROANAL 2020. [DOI: 10.1002/elan.202060351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Muthu Dinesh
- Advanced Materials and Devices Laboratory (AMDL) Department of Nanoscience and Technology Bharathiar University Coimbatore 641 046 Tamil Nadu India
| | - K. Muthumalai
- Advanced Materials and Devices Laboratory (AMDL) Department of Nanoscience and Technology Bharathiar University Coimbatore 641 046 Tamil Nadu India
| | - Yuvaraj Haldorai
- Advanced Materials and Devices Laboratory (AMDL) Department of Nanoscience and Technology Bharathiar University Coimbatore 641 046 Tamil Nadu India
| | - Ramasamy Thangavelu Rajendra Kumar
- Advanced Materials and Devices Laboratory (AMDL) Department of Nanoscience and Technology Bharathiar University Coimbatore 641 046 Tamil Nadu India
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Mahmoodi P, Rezayi M, Rasouli E, Avan A, Gholami M, Ghayour Mobarhan M, Karimi E, Alias Y. Early-stage cervical cancer diagnosis based on an ultra-sensitive electrochemical DNA nanobiosensor for HPV-18 detection in real samples. J Nanobiotechnology 2020; 18:11. [PMID: 31931815 PMCID: PMC6956556 DOI: 10.1186/s12951-020-0577-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 01/07/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND In several years ago, infection with human papillomaviruses (HPVs), have been prevalent in the worlds especially HPV type 18, can lead to cervical cancer. Therefore, rapid, accurate, and early diagnosis of HPV for successful treatment is essential. The present study describes the development of a selective and sensitive electrochemical biosensor base on DNA, for early detection of HPV-18. For this purpose, a nanocomposite of reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs) were electrodeposited on a screen-printed carbon electrode (SPCE). Then, Au nanoparticles (AuNPs) were dropped on a modified SPCE. Subsequently, single strand DNA (ssDNA) probe was immobilized on the modified electrode. The link attached between AuNPs and probe ssDNA provided by L-cysteine via functionalizing AuNPs (Cys-AuNPs). The differential pulse voltammetry (DPV) assay was also used to electrochemical measurement. The measurement was based on the oxidation signals of anthraquninone-2-sulfonic acid monohydrate sodium salt (AQMS) before and after hybridization between the probe and target DNA. RESULTS The calibration curve showed a linear range between 0.01 fM to 0.01 nM with a limit of detection 0.05 fM. The results showed that the optimum concentration for DNA probe was 5 µM. The good performance of the proposed biosensor was achieved through hybridization of DNA probe-modified SPCE with extracted DNA from clinical samples. CONCLUSIONS According to the investigated results, this biosensor can be introduced as a proprietary, accurate, sensitive, and rapid diagnostic method of HPV 18 in the polymerase chain reaction (PCR) of real samples.
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Affiliation(s)
- Pegah Mahmoodi
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Majid Rezayi
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
- Metabolic Syndrome Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Elisa Rasouli
- Nanotechnology & Catalysis Research Centre, Institute of Postgraduate Studies, University Malaya, 50603, Kuala Lumpur, Malaysia
| | - Amir Avan
- Metabolic Syndrome Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehrdad Gholami
- Department of Chemistry, Marvdasht Branch, Islamic Azad University, P.O. Box 465, Marvdasht, Iran
| | - Majid Ghayour Mobarhan
- Metabolic Syndrome Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Karimi
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Yatima Alias
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Mao H, Ye X, Chen W, Geng W, Chen G. Fabrication of carbon nanotube-polylactic acid composite electrode by melt compounding for capillary electrophoretic determination of tectoridin and irigenin in Belamcandae Rhizoma. J Pharm Biomed Anal 2019; 175:112769. [PMID: 31398628 DOI: 10.1016/j.jpba.2019.07.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/06/2019] [Accepted: 07/08/2019] [Indexed: 01/01/2023]
Abstract
A sensitive detection electrode based on the composite of carbon nanotubes (CNTs) and polylactic acid (PLA) was fabricated for measuring the bioactive constituents in Belamcandae Rhizoma by capillary electrophoresis (CE). The composite was facilely fabricated by packing a blend of CNTs and melted PLA into a fused silica capillary under heat. The prepared CNT-PLA composite was characterized by scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and cyclic voltammetry. The results indicated that PLA bound electrically conductive CNTs to form a well-dispersed composite network for electrochemical sensing. The electrode was employed to the off-line detection of tectoridin and irigenin in Belamcandae Rhizoma to demonstrate its performance in capillary electrophoresis. At a separation voltage of 12 kV, the two isoflavones were well separated and detected within 8 min in a 40-cm fused silica capillary in a borate buffer at pH 9.8. The detection limits for tectoridin and irigenin were measured to be 0.24 and 0.21 μM, respectively.
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Affiliation(s)
- Hua Mao
- Fudan University, Affiliated Pudong Medical Center & Pharmaceutical Analysis Department, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Xinming Ye
- School of Sports Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Weilong Chen
- Phenom Scientific Instrument (Shanghai) Co., Ltd., Shanghai, 201203, China
| | - Wenye Geng
- Fudan University, Affiliated Pudong Medical Center & Pharmaceutical Analysis Department, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Gang Chen
- Fudan University, Affiliated Pudong Medical Center & Pharmaceutical Analysis Department, School of Pharmacy, Fudan University, Shanghai, 201203, China.
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Wang X, Wang J, Zhang L, Chen G. Carbon Nanotube‐phenolic Resin Composite Electrode Fabricated by Far Infrared‐assisted Crosslinking for Enhanced Amperometric Detection. ELECTROANAL 2019. [DOI: 10.1002/elan.201800604] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xinmei Wang
- School of PharmacyFudan University Shanghai 201203 China
| | - Jing Wang
- Department of Sports and HealthShanghai Lixin University of Accounting and Finance Shanghai 201620 China
| | - Luyan Zhang
- School of PharmacyFudan University Shanghai 201203 China
| | - Gang Chen
- School of PharmacyFudan University Shanghai 201203 China
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Abbar JC, Meti MD, Nandibewoor ST. Electro-Catalytic Behavior of an Antiarrhythmic Drug, Procainamide and its Electro-Analytical Applications. J ELECTROCHEM SCI TE 2018. [DOI: 10.33961/jecst.2018.9.4.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sipa K, Brycht M, Leniart A, Nosal–Wiercińska A, Skrzypek S. Improved electroanalytical characteristics for the determination of pesticide metobromuron in the presence of nanomaterials. Anal Chim Acta 2018; 1030:61-69. [DOI: 10.1016/j.aca.2018.05.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 11/29/2022]
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Brycht M, Leniart A, Zavašnik J, Nosal-Wiercińska A, Wasiński K, Półrolniczak P, Skrzypek S, Kalcher K. Synthesis and characterization of the thermally reduced graphene oxide in argon atmosphere, and its application to construct graphene paste electrode as a naptalam electrochemical sensor. Anal Chim Acta 2018; 1035:22-31. [PMID: 30224141 DOI: 10.1016/j.aca.2018.06.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 05/27/2018] [Accepted: 06/19/2018] [Indexed: 11/26/2022]
Abstract
New insight into the preparation of sensitive carbon-based electrochemical electrode is provided by examining the properties of thermally reduced graphene oxide (TRGO). In this paper, TRGO was prepared by thermal reduction of graphene oxide (GO) in argon atmosphere, and characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction (SAED), and atomic force microscopy (AFM). Results showed that thermal reduction in argon was effective to remove oxygen-containing functional groups in GO, and graphene sheets were obtained. Furthermore, TRGO was used to prepare thermally reduced graphene oxide paste electrode (TRGOPE) which showed excellent conductivity and fast electron transfer kinetics confirmed by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The electrode was applied to determination of the pesticide naptalam (Nap) in square-wave voltammetric (SWV) mode. The corresponding current at approx. +1.0 V increased linearly with the Nap concentration within two linear dynamic ranges (LDR) of 0.1-1.0 μmol L-1 (LDR1) and 1.0-10.0 μmol L-1 (LDR2). The limits of detection (LOD) and quantification (LOQ) for Nap were calculated as 0.015 μmol L-1 and 0.051 μmol L-1, respectively. In comparison to the carbon paste electrode (CPE) the results showed that the TRGOPE possesses advantages in terms of linearity, sensitivity and detectability.
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Affiliation(s)
- Mariola Brycht
- University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Tamka 12, 91-403 Lodz, Poland.
| | - Andrzej Leniart
- University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Tamka 12, 91-403 Lodz, Poland
| | - Janez Zavašnik
- Centre for Electron Microscopy and Microanalysis, Jožef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia; Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Agnieszka Nosal-Wiercińska
- Maria Skłodowska-Curie University, Faculty of Chemistry, M. Skłodowska-Curie sq. 3, 20-031 Lublin, Poland
| | - Krzysztof Wasiński
- Institute of Non-Ferrous Metals Division in Poznań, Central Laboratory of Batteries and Cells, Forteczna 12, 61-362 Poznań, Poland
| | - Paulina Półrolniczak
- Institute of Non-Ferrous Metals Division in Poznań, Central Laboratory of Batteries and Cells, Forteczna 12, 61-362 Poznań, Poland
| | - Sławomira Skrzypek
- University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Tamka 12, 91-403 Lodz, Poland
| | - Kurt Kalcher
- Karl-Franzens University, Institute of Chemistry - Analytical Chemistry, Universitätsplatz 1, A-8010 Graz, Austria
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