1
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Ueda T, Yamaguchi MS, Christian-Tabak L, Takai Y, Tode C. Quantifying the bitter masking effect of drug-cyclodextrin complexation: NMR-ROESY mixing time approach. Carbohydr Res 2024; 537:109067. [PMID: 38442683 DOI: 10.1016/j.carres.2024.109067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 02/15/2024] [Accepted: 02/18/2024] [Indexed: 03/07/2024]
Abstract
Taste, especially unpleasant taste, can be key for patient compliance. In the formulation development process, drug-cyclodextrin (CD) inclusion complexes are often used to improve the solubility of a drug and/or mask its bitterness. This study aimed to evaluate the bitter masking effect of CDs on different drugs using NMR-ROESY analysis, human sensory tests, and e-tongue measurements. The strength of inclusion complex formation between drugs and CDs was investigated by NMR-ROSEY, and these results were compared to human sensory test results. In the sensory test, participants identified which drug-CD inclusion complexes were not bitter. NMR-ROSEY results aligned with the sensory tests; short magnetization transfer times corresponded to masked bitterness. The electrical tongue was not able to detect the taste of any of the drug-CD inclusion complexes. Additionally, we used NMR-ROSEY to determine which drug-CD inclusion complex formed in a system with multiple drug substances present. This research offers valuable insights into the bitter masking effect of CDs on different drugs and presents a comprehensive evaluation approach using various methods. This knowledge has significant implications for the pharmaceutical industry, clinical practice, and patient care, contributing to improved patient compliance and satisfaction with bitter medications.
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Affiliation(s)
- Tomohiko Ueda
- Sumitomo Pharma Co., Ltd., 3-1-98 Kasugade-naka, Konohana-ku, Osaka, 554-0022, Japan.
| | - Mei S Yamaguchi
- Sumitomo Pharma Co., Ltd., 3-1-98 Kasugade-naka, Konohana-ku, Osaka, 554-0022, Japan
| | - Leela Christian-Tabak
- Sumitomo Pharma Co., Ltd., 3-1-98 Kasugade-naka, Konohana-ku, Osaka, 554-0022, Japan
| | - Yoshiaki Takai
- Sumitomo Pharma Co., Ltd., 3-1-98 Kasugade-naka, Konohana-ku, Osaka, 554-0022, Japan
| | - Chisato Tode
- Kobe Pharmaceutical University, 4-19-1 Motoyama-kitamachi, Higashinada-ku, Kobe, Hyogo, 658-8558, Japan.
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2
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Zhang W, Wang S, Kang D, Xiong Z, Huang Y, Ma L, Liu Y, Zhao W, Chen S, Xu Y. Integrated Microfluidic Chip Technology for Copper Ion Detection Using an All-Solid-State Ion-Selective Electrode. MICROMACHINES 2024; 15:160. [PMID: 38276859 PMCID: PMC10821244 DOI: 10.3390/mi15010160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
This study involved the preparation of an all-solid-state ion-selective electrode (ASS-ISE) with copper and a poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate (PEDOT/PSS) conversion layer through electrode deposition. The morphology of the PEDOT/PSS film was characterized, and the performance of the copper ion-selective film was optimized. Additionally, a microfluidic chip for the ASS-ISE with copper was designed and prepared. An integrated microfluidic chip test system with an ASS-ISE was developed using a self-constructed potential detection device. The accuracy of the system was validated through comparison testing with atomic absorption spectrophotometry (AAS). The experimental findings indicate that the relative standard deviation (RSD) of the integrated ASS-ISE with the copper microfluidic chip test system is 4.54%, as compared to the industry standard method. This value complies with the stipulated requirement of an RSD ≤ 5% in DL/T 955-2016.
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Affiliation(s)
- Wenpin Zhang
- School of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (W.Z.)
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Shuangquan Wang
- School of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (W.Z.)
| | - Dugang Kang
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Zhi Xiong
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Yong Huang
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Lin Ma
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Yun Liu
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Wei Zhao
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Shouliang Chen
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401121, China (Z.X.); (Y.H.); (W.Z.)
- Key Laboratory of Electromechanical Equipment Security in Western Complex Environment for State Market Regulation, Chongqing 401121, China
| | - Yi Xu
- School of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; (W.Z.)
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3
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Garg S, Goel N. Photodegradation of dye using Polythiophene/ZnO nanocomposite: A computational approach. J Mol Graph Model 2022; 117:108285. [PMID: 35964365 DOI: 10.1016/j.jmgm.2022.108285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 07/27/2022] [Accepted: 07/27/2022] [Indexed: 01/14/2023]
Abstract
Incorporating nanostructured photocatalysts in polymers is a strategic way to obtain novel water purification systems. Here, we present density functional theory (DFT) study of Polythiophene/Zinc oxide (PTh/ZnO) nanocomposite with high photocatalytic performance and stability which exhibits superior degradation of alizarine dye under the visible light condition with interaction energy of -149.55 kcal/mol between conducting polymer (PTh) and metal oxide, with PTh sponsoring more number of electrons to the conduction band of ZnO. The electrical and optical properties of optimized geometries of PTh/ZnO nanocomposite were studied by frontier molecular orbital analysis, natural bond orbital (NBO) charge simulation, natural electronic configuration, and UV-vis absorption spectra. The modulation of the energy band gap (∽ 2.60 eV) and exciton binding energy (∽ 0.36 eV) causes visible light absorption and hence enhances the photodegradation activity of PTh/ZnO. NBO analysis evidences the electron accepting behavior of ZnO in the composites as it withdraws electron cloud density of about 0.14e from the polymer unit.
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Affiliation(s)
- Shivangi Garg
- Computational and Theoretical Chemistry Group, Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, Chandigarh, India
| | - Neetu Goel
- Computational and Theoretical Chemistry Group, Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, Chandigarh, India.
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4
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Mushtaq A, Cho H, Ryu H, Ahmed MA, Saif Ur Rehman M, Han JI. Novel metallic stainless-steel mesh-supported conductive membrane and its performance in the electro-filtration process. CHEMOSPHERE 2022; 308:136160. [PMID: 36030940 DOI: 10.1016/j.chemosphere.2022.136160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/06/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
In this study, we demonstrate the fabrication of a thoroughly metallic electro-conductive membrane by using simple filtration to uniformly coat AgNWs dispersion through stainless steel (SUS)-mesh, which functions both as filter and a flexible conductive substrate. The as-prepared AgNWs networks layer on the SUS-mesh was further strengthened by electroplating Ag layers (P-SUS membrane); exhibiting an overall electrical conductivity of 9.2 × 104 S/m, which is up to 42 times greater than the conductivity of pristine SUS-mesh. The P-SUS membrane exhibited adequate physical durability against chemical and mechanical stresses under prolonged filtration, and high pure water flux of 534 ± 54 LMH/bar. This electro-membrane displayed the anticipated flux recovery in harvesting microalgae (Chlorella sp. HS-2) when filtration was done with the membrane used as a cathode: micro-sized bubbles, generated from the cathodic membrane, functioned to detach the foulants and recover the relative flux to a significant level. The P-SUS membrane indeed possesses necessary traits that the polymer-support membrane lacks, in terms of not only electrical conductivity and mechanical strength but also filtration performance with anti-fouling capability, all of which are of necessity to be considered workable electroconductive membrane.
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Affiliation(s)
- Azeem Mushtaq
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea; Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Pakistan
| | - Hoon Cho
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Hoyoung Ryu
- Department of Chemical and Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Muhammad Ajaz Ahmed
- Graduate School of International Agricultural Technology, Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang, 232-916, Republic of Korea
| | - Muhammad Saif Ur Rehman
- Department of Chemical Engineering, Khawaja Fareed University of Engineering & Information Technology, Rahim Yar Khan, Pakistan
| | - Jong-In Han
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
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5
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Dwivedi G, Munjal G, Bhaskarwar AN, Chaudhary A. Dye-sensitized solar cells with polyaniline: A review. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2021.109087] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Silva R, Zhao K, Ding R, Chan WP, Yang M, Yip JSQ, Lisak G. Ion-selective membrane modified microfluidic paper-based solution sampling substrates for potentiometric heavy metal detection. Analyst 2022; 147:4500-4509. [DOI: 10.1039/d2an01108e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ion-selective membrane modified paper substrates were used to control the unfavourable super-Nernstian response of Pb2+-ISEs when coupled with microfluidic paper-based solution sampling.
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Affiliation(s)
- Rochelle Silva
- Interdisciplinary Graduate Programme, Nanyang Technological University, 61 Nanyang Drive, Academic Block North, Singapore 637335, Singapore
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
| | - Ke Zhao
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Ruiyu Ding
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wei Ping Chan
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
| | - Mingpeng Yang
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
- School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Jane Si Qi Yip
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Grzegorz Lisak
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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Bekkar F, Bettahar F, Moreno I, Meghabar R, Hamadouche M, Hernáez E, Vilas-Vilela JL, Ruiz-Rubio L. Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years. Polymers (Basel) 2020; 12:E2227. [PMID: 32998386 PMCID: PMC7601494 DOI: 10.3390/polym12102227] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/24/2020] [Accepted: 09/26/2020] [Indexed: 01/09/2023] Open
Abstract
Polycarbazole and its derivatives have been extensively used for the last three decades, although the interest in these materials briefly decreased. However, the increasing demand for conductive polymers for several applications such as light emitting diodes (OLEDs), capacitators or memory devices, among others, has renewed the interest in carbazole-based materials. In this review, the synthetic routes used for the development of carbazole-based polymers have been summarized, reviewing the main synthetic methodologies, namely chemical and electrochemical polymerization. In addition, the applications reported in the last decade for carbazole derivatives are analysed. The emergence of flexible and wearable electronic devices as a part of the internet of the things could be an important driving force to renew the interest on carbazole-based materials, being conductive polymers capable to respond adequately to requirement of these devices.
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Affiliation(s)
- Fadila Bekkar
- Laboratoire de Chimie des Polymères, Université Oran1 Ahmed Ben Bella, El-Mnaouer, BP 1524, Oran 31000, Algerie; (F.B.); (F.B.); (R.M.)
| | - Faiza Bettahar
- Laboratoire de Chimie des Polymères, Université Oran1 Ahmed Ben Bella, El-Mnaouer, BP 1524, Oran 31000, Algerie; (F.B.); (F.B.); (R.M.)
| | - Isabel Moreno
- Macromolecular Chemistry Group (LQM), Organic Chemistry II Department, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain;
| | - Rachid Meghabar
- Laboratoire de Chimie des Polymères, Université Oran1 Ahmed Ben Bella, El-Mnaouer, BP 1524, Oran 31000, Algerie; (F.B.); (F.B.); (R.M.)
| | - Mohammed Hamadouche
- Laboratoire de Chimie Fine, Département de Chimie, Faculté des Sciences Exactes et Appliquées, Université Oran1 Ahmed Ben Bella, El-Mnaouer, BP 1524, Oran 31000, Algerie;
| | - Estibaliz Hernáez
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; (E.H.); (J.L.V.-V.)
| | - José Luis Vilas-Vilela
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; (E.H.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Leire Ruiz-Rubio
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; (E.H.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
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8
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Applications of Nanotechnology in Sensor-Based Detection of Foodborne Pathogens. SENSORS 2020; 20:s20071966. [PMID: 32244581 PMCID: PMC7181077 DOI: 10.3390/s20071966] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 02/06/2023]
Abstract
The intake of microbial-contaminated food poses severe health issues due to the outbreaks of stern food-borne diseases. Therefore, there is a need for precise detection and identification of pathogenic microbes and toxins in food to prevent these concerns. Thus, understanding the concept of biosensing has enabled researchers to develop nanobiosensors with different nanomaterials and composites to improve the sensitivity as well as the specificity of pathogen detection. The application of nanomaterials has enabled researchers to use advanced technologies in biosensors for the transfer of signals to enhance their efficiency and sensitivity. Nanomaterials like carbon nanotubes, magnetic and gold, dendrimers, graphene nanomaterials and quantum dots are predominantly used for developing biosensors with improved specificity and sensitivity of detection due to their exclusive chemical, magnetic, mechanical, optical and physical properties. All nanoparticles and new composites used in biosensors need to be classified and categorized for their enhanced performance, quick detection, and unobtrusive and effective use in foodborne analysis. Hence, this review intends to summarize the different sensing methods used in foodborne pathogen detection, their design, working principle and advances in sensing systems.
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9
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Ke X. Micro-fabricated electrochemical chloride ion sensors: From the present to the future. Talanta 2020; 211:120734. [PMID: 32070599 DOI: 10.1016/j.talanta.2020.120734] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/07/2020] [Accepted: 01/10/2020] [Indexed: 12/17/2022]
Abstract
The real-time detection and monitoring of chloride ion concentrations play important roles in broad industrial applications, including wearable health care device, environmental pollutant control and infrastructure corrosion monitoring. The development of all-solid-state micro-fabricated electrochemical sensors has enabled the miniaturisation of these testing devices. This study reviewed the micro-fabricated electrochemical chloride sensors developed since 1970s, together with a brief summary regarding the progression of miniaturised electrochemical sensors in the past half century. Three major types of electrochemical chloride sensors with specific ion-selectivity have been discussed, the potentiometric sensors (including both ion-selective electrodes and chemical FETs), the chronopotentiometric sensors and the voltammetric sensors. In addition, colorimetric sensors, an emerging low-cost, portable, fast diagnose sensor technique has been included in this review. Four critical sensor performances have been reviewed and compared systematically, the sensibility (chloride concentration range), selectivity, lifetime and applicable pH ranges. The future perspectives for engineering applications proposed in this review will benefit the further development of integrated multi-functional sensors, as well as new instrumental testing methods.
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Affiliation(s)
- Xinyuan Ke
- Department of Architecture and Civil Engineering, The University of Bath, Bath, BA2 7AY, United Kingdom.
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10
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Badakhshan S, Ahmadzadeh S, Mohseni-Bandpei A, Aghasi M, Basiri A. Potentiometric sensor for iron (III) quantitative determination: experimental and computational approaches. BMC Chem 2019; 13:131. [PMID: 31832628 PMCID: PMC6859631 DOI: 10.1186/s13065-019-0648-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/01/2019] [Indexed: 11/10/2022] Open
Abstract
The current work deals with fabrication and validation of a new highly Fe3+ selective sensor based on benzo-18-crown-6 (b-18C6) using the potentiometric method. The proposed sensor revealed satisfactory performance for quantitative evaluation of Fe3+ trace amount in environmental samples. The ratio of membrane ingredients optimized and the membrane with the composition of 4:30:65.5:0.5 mg of b-18C6:PVC:o-NPOE:KTpClPB exhibited the desirable Nernstian slope of 19.51 ± 0.10 (mV per decade of activity) over the pH range from 2.5 to 5.7 with an acceptable dynamic concentration range of 1.0 × 10-6 M to 1.0 × 10-1 M and lower detection limit of 8.0 × 10-7 M. The proposed sensor demonstrated an appropriate reproducibility with a rapid response time of 12 s and the suitable lifetime of 10 weeks. To validate the accurate response of the proposed sensor, AAS technique applied for the determination of Fe3+ in real aqueous mediums such as drinking tap water and hospital wastewater sample after treatment by electrocoagulation process. Theoretical studies carried out using DFT/B3LYP computational level with 6-311G basis set to optimize the adsorption sites of Fe+3 cationic species by b-18C6. The obtained adsorption energy with large negative value confirmed the formation of a stable complex.
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Affiliation(s)
- Somayeh Badakhshan
- 1Student research committee, Kerman University of Medical Sciences, Kerman, Iran.,Department of Environmental Health Engineering, School of Public Health, Bam University of Medical Sciences, Bam, Iran
| | - Saeid Ahmadzadeh
- 3Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, P.O. Box: 76175-493, 76169-11319 Kerman, Iran.,4Food, Drug and Cosmetics Safety Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Anoushiravan Mohseni-Bandpei
- 5Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Aghasi
- 6Department of Environmental Health Engineering, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
| | - Amir Basiri
- 7Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
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11
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Ayalew H, Wang TL, Yu HH. Deprotonation-Induced Conductivity Shift of Polyethylenedioxythiophenes in Aqueous Solutions: The Effects of Side-Chain Length and Polymer Composition. Polymers (Basel) 2019; 11:E659. [PMID: 30974910 PMCID: PMC6523877 DOI: 10.3390/polym11040659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/02/2019] [Accepted: 04/04/2019] [Indexed: 11/16/2022] Open
Abstract
Deprotonation-induced conductivity shift of poly(3,4-ethylenedixoythiophene)s (PEDOTs) in aqueous solutions is a promising platform for chemical or biological sensor due to its large signal output and minimum effect from material morphology. Carboxylic acid group functionalized poly(Cn-EDOT-COOH)s are synthesized and electrodeposited on microelectrodes. The microelectrodes are utilized to study the effect of carboxylic acid side-chain length on the conductivity curve profiles in aqueous buffer with different pH. The conductivity shifts due to the buffer pH are effected by the length of the carboxylic acid side-chains. The shifts can be explained by the carboxylic acid dissociation property (pKa) at the solid-liquid interface, self-doping effect, and effective conjugation length. Conductivity profiles of poly(EDOT-OH-co-C₂-EDOT-COOH) copolymers are also studied. The shifts show linear relationship with the feed monomer composition used in electrochemical polymerization.
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Affiliation(s)
- Hailemichael Ayalew
- Smart Organic Materials Laboratory, Institute of Chemistry, Academia Sinica, 128 Sec. 2, Academia Road, Nankang, Taipei 11529, Taiwan.
- Taiwan International Graduate Program (TIGP), Sustainable Chemical Science and Technology (SCST), Academia Sinica, Taipei 11529, Taiwan.
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Tian-Lin Wang
- Smart Organic Materials Laboratory, Institute of Chemistry, Academia Sinica, 128 Sec. 2, Academia Road, Nankang, Taipei 11529, Taiwan.
| | - Hsiao-Hua Yu
- Smart Organic Materials Laboratory, Institute of Chemistry, Academia Sinica, 128 Sec. 2, Academia Road, Nankang, Taipei 11529, Taiwan.
- Taiwan International Graduate Program (TIGP), Sustainable Chemical Science and Technology (SCST), Academia Sinica, Taipei 11529, Taiwan.
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12
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Bujes-Garrido J, Izquierdo-Bote D, Heras A, Colina A, Arcos-Martínez MJ. Determination of halides using Ag nanoparticles-modified disposable electrodes. A first approach to a wearable sensor for quantification of chloride ions. Anal Chim Acta 2018; 1012:42-48. [PMID: 29475472 DOI: 10.1016/j.aca.2018.01.063] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 01/24/2018] [Accepted: 01/27/2018] [Indexed: 11/18/2022]
Abstract
This work reports a simple voltammetric method for the determination of chloride, bromide, and iodide ions using screen-printed carbon electrodes modified with silver nanoparticles electrochemically deposited on the working electrode surface. UV/Vis absorption spectroelectrochemistry was used to study the electrodeposition of silver nanoparticles on the working carbon electrode on PET or Gore-Tex® supports, and their subsequent oxidation in the presence of halide ions. The main figures of merit of the developed sensors, such as reproducibility and detection limit, have been calculated. Reproducibility values of 2.22%, 2.83% and 3.23% were obtained for chloride, bromide and iodide determinations, respectively. Additionally, the lowest detected amount of chloride, bromide and iodide ions were 3.0·10-6 M, 5.0·10-6 M and 5.0·10-6 M, respectively. Taking into account the relevance of the determination of chloride ion concentration in sweat, the voltammetric method for the determination of halides has been successfully transferred to a Gore-Tex® support to build a first approach to a wearable sensor that facilitates the quantification of this ion in sweat samples. The Gore-Tex® sensor provides a good reproducibility (RSD = 1.61%).
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Affiliation(s)
- J Bujes-Garrido
- Department of Chemistry, Faculty of Sciences, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - D Izquierdo-Bote
- Department of Chemistry, Faculty of Sciences, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - A Heras
- Department of Chemistry, Faculty of Sciences, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - A Colina
- Department of Chemistry, Faculty of Sciences, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - M J Arcos-Martínez
- Department of Chemistry, Faculty of Sciences, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
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13
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3D carbon nanofiber microelectrode arrays fabricated by plasma-assisted pyrolysis to enhance sensitivity and stability of real-time dopamine detection. Biomed Microdevices 2017; 18:112. [PMID: 27900618 DOI: 10.1007/s10544-016-0136-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
In this paper, we have fabricated 3D carbon nanofiber microelectrode arrays (MEAs) with highly reproducible and rich chemical surface areas for fast scan cyclic voltammetry (FSCV). Carbon nanofibers are created from negative photoresist by a new process called dual O2 plasma-assisted pyrolysis. The proposed approach significantly improves film adhesion and increases surface reactivity. We showcase our sensor's compatibility with FSCV analysis by demonstrating highly sensitive and stable FSCV dopamine measurements on a prototype 4-channel array. We envision with proper surface fuctionalization the 3D carbon nanofiber MEA enable sensitive and reliable detection of multiple neurotransmitters simultaneously.
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Bajpai AK, Bhatt R. Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) enabled analysis of inter-polymer phases formation in poly (diaminonaphthalene) doped conducting poly (vinyl alcohol) films. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Abdel-Haleem FM, Rizk MS, Badr IHA. Potentiometric Determination of Ciprofloxacin in Physiological Fluids Using Carbon Paste and Nano-Composite Carbon Paste Electrodes. ELECTROANAL 2017. [DOI: 10.1002/elan.201600735] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | - Mahmoud S. Rizk
- Chemistry Department, Faculty of Science; Cairo University; Giza Egypt
| | - Ibrahim H. A. Badr
- Chemistry Department, Faculty of Science; Ain Shams University; Cairo Egypt
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16
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Mercury(II) selective sensors based on AlGaN/GaN transistors. Anal Chim Acta 2016; 943:1-7. [DOI: 10.1016/j.aca.2016.08.045] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/20/2016] [Accepted: 08/30/2016] [Indexed: 11/17/2022]
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17
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Qin X, Miao Z, Du X, Chen Q. Electrocatalytic Activation of Silver Nanowires-modified Pt Electrode by Cyclic Voltammetry in Comparison with Differential Pulse Voltammetry in Halide Determination. ELECTROANAL 2016. [DOI: 10.1002/elan.201500248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Schwarz J, Trommer K, Mertig M. Novel Screen-Printed All-Solid-State Copper(II)-Selective Electrode for Mobile Environmental Analysis. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/ajac.2016.77048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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A new nano-composite potentiometric sensor containing an Hg2+-ion imprinted polymer for the trace determination of mercury ions in different matrices. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.01.014] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Banu K, Shimura T, Sadeghi S. Selective detection and recovery of gold at tannin-immobilized non-conducting electrode. Anal Chim Acta 2015; 853:207-213. [PMID: 25467460 PMCID: PMC4618489 DOI: 10.1016/j.aca.2014.09.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/15/2014] [Accepted: 09/19/2014] [Indexed: 01/07/2023]
Abstract
A tannin-immobilized glassy carbon electrode (TIGC) was prepared via electrochemical oxidation of the naturally occurring polyphenolic mimosa tannin, which generated a non-conducting polymeric film (NCPF) on the electrode surface. The fouling of the electrode surface by the electropolymerized film was evaluated by monitoring the electrode response of ferricyanide ions as a redox marker. The NCPF was permselective to HAuCl4, and the electrochemical reduction of HAuCl4 to metallic gold at the TIGC electrode was evaluated by recording the reduction current during cyclic voltammetry measurement. In the mixed electrolyte containing HAuCl4 along with FeCl3 and/or CuCl2, the NCPF remained selective toward the electrochemical reduction of HAuCl4 into the metallic state. The chemical reduction of HAuCl4 into metallic gold was also observed when the NCPF was inserted into an acidic gold solution overnight. The adsorption capacity of Au(III) on tannin-immobilized carbon fiber was 29±1.45 mg g(-1) at 60°C. In the presence of excess Cu(II) and Fe(III), tannin-immobilized NCPF proved to be an excellent candidate for the selective detection and recovery of gold through both electrochemical and chemical processes.
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Affiliation(s)
- Khaleda Banu
- Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, United States; Venture Business Laboratory, Center for Advanced Science and Innovation, Osaka University, Suita, Osaka 565-0871, Japan.
| | - Takayoshi Shimura
- Venture Business Laboratory, Center for Advanced Science and Innovation, Osaka University, Suita, Osaka 565-0871, Japan; Department of Material & Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, Japan
| | - Saman Sadeghi
- Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, United States.
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21
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Adley CC. Past, Present and Future of Sensors in Food Production. Foods 2014; 3:491-510. [PMID: 28234333 PMCID: PMC5302250 DOI: 10.3390/foods3030491] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/18/2014] [Accepted: 07/21/2014] [Indexed: 12/16/2022] Open
Abstract
Microbial contamination management is a crucial task in the food industry. Undesirable microbial spoilage in a modern food processing plant poses a risk to consumers' health, causing severe economic losses to the manufacturers and retailers, contributing to wastage of food and a concern to the world's food supply. The main goal of the quality management is to reduce the time interval between the filling and the detection of a microorganism before release, from several days, to minutes or, at most, hours. This would allow the food company to stop the production, limiting the damage to just a part of the entire batch, with considerable savings in terms of product value, thereby avoiding the utilization of raw materials, packaging and strongly reducing food waste. Sensor systems offer major advantages over current systems as they are versatile and affordable but need to be integrated in the existing processing systems as a process analytical control (PAT) tool. The desire for good selectivity, low cost, portable and usable at working sites, sufficiently rapid to be used at-line or on-line, and no sample preparation devices are required. The application of biosensors in the food industry still has to compete with the standard analytical techniques in terms of cost, performance and reliability.
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Affiliation(s)
- Catherine C Adley
- Microbiology Laboratory, Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland.
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22
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Sessolo M, Rivnay J, Bandiello E, Malliaras GG, Bolink HJ. Ion-selective organic electrochemical transistors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4803-4807. [PMID: 24862110 DOI: 10.1002/adma.201400731] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/04/2014] [Indexed: 06/03/2023]
Abstract
Ion-selective organic electrochemical transistors with sensitivity to potassium approaching 50 μA dec(-1) are demonstrated. The remarkable sensitivity arises from the use of high transconductance devices, where the conducting polymer is in direct contact with a reference gel electrolyte and integrated with an ion-selective membrane.
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Affiliation(s)
- Michele Sessolo
- Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980, Paterna, Spain
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Shrivastava A, Sharma J, Soni V. Various electroanalytical methods for the determination of uranium in different matrices. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bfopcu.2012.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Urea Assisted Synthesis of Flower Like CuO Nanostructures and Their Chemical Sensing Application for the Determination of Cadmium Ions. ELECTROANAL 2013. [DOI: 10.1002/elan.201200660] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Monitoring ion activities in and around cells using ion-selective liquid-membrane microelectrodes. SENSORS 2013; 13:984-1003. [PMID: 23322102 PMCID: PMC3574717 DOI: 10.3390/s130100984] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 12/31/2012] [Accepted: 01/02/2013] [Indexed: 11/24/2022]
Abstract
Determining the effective concentration (i.e., activity) of ions in and around living cells is important to our understanding of the contribution of those ions to cellular function. Moreover, monitoring changes in ion activities in and around cells is informative about the actions of the transporters and/or channels operating in the cell membrane. The activity of an ion can be measured using a glass microelectrode that includes in its tip a liquid-membrane doped with an ion-selective ionophore. Because these electrodes can be fabricated with tip diameters that are less than 1 μm, they can be used to impale single cells in order to monitor the activities of intracellular ions. This review summarizes the history, theory, and practice of ion-selective microelectrode use and brings together a number of classic and recent examples of their usefulness in the realm of physiological study.
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Abstract
A new biomimetic sensor for leucomalachite green host-guest interactions and potentiometric transduction is presented. The artificial host was imprinted in methacrylic acid or acrylamido-2-methyl-1-propanesulfonic acid-based polymers. Molecularly imprinted particles were dispersed in 2-nitrophenyloctyl ether and trapped in poly(vinyl chloride). The potentiometric sensors exhibited a near-Nernstianresponse in steady state evaluations, with slopes and detection limits ranging from 45.8 to 81.2 mVdecade-1and 0.28 to 1.01 μg mL-1, respectively. They were independent from the pH of test solutions within 3 to 5. Good selectivity was observed towards drugs that may contaminate water near fish cultures, such as oxycycline, doxycycline, enrofloxacin, trimethoprim, creatinine, chloramphenicol, and dopamine. The sensors were successfully applied to field monitoring of leucomalachite green in river samples. The method offered the advantages of simplicity, accuracy, applicability to colored and turbid samples, and automation feasibility.
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28
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Opportunities and challenges of using ion-selective electrodes in environmental monitoring and wearable sensors. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.04.147] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Ma YZ, Shaw RW, Yu X, O’Neill HM, Hong K. Excited-State Dynamics of Water-Soluble Polythiophene Derivatives: Temperature and Side-Chain Length Effects. J Phys Chem B 2012; 116:14451-60. [DOI: 10.1021/jp304526h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ying-Zhong Ma
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Robert W. Shaw
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Xiang Yu
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Hugh M. O’Neill
- Center for Structural Molecular Biology, Biology & Soft Matter Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
| | - Kunlun Hong
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
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30
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Tahir TF, Salhin A, Ghani SA. Flow injection analysis of mercury using 4-(dimethylamino) benzaldehyde-4-ethylthiosemicarbazone as the ionophore of a coated wire electrode. SENSORS (BASEL, SWITZERLAND) 2012; 12:14968-82. [PMID: 23202196 PMCID: PMC3522949 DOI: 10.3390/s121114968] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 09/29/2012] [Accepted: 10/19/2012] [Indexed: 11/17/2022]
Abstract
A flow injection analysis (FIA) incorporating a thiosemicarbazone-based coated wire electrode (CWE) was developed method for the determination of mercury(II). A 0.1 M KNO(3) carrier stream with pH between 1 and 5 and flow rate of 1 mL·min(-1) were used as optimum parameters. A linear plot within the concentration range of 5 × 10(-6)–0.1 M Hg(II), slope of 27.8 ± 1 mV per decade and correlation coefficient (R2) of 0.984 were obtained. The system was successfully applied for the determination of mercury(II) in dental amalgam solutions and spiked environmental water samples. Highly reproducible measurements with relative standard deviation (RSD < 1% (n = 3)) were obtained, giving a typical throughput of 30 samples·h(-1).
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Affiliation(s)
- Tara F. Tahir
- Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11800 USM P. Pinang, Malaysia; E-Mails: (T.F.T.); (A.S.)
| | - Abdussalam Salhin
- Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11800 USM P. Pinang, Malaysia; E-Mails: (T.F.T.); (A.S.)
| | - Sulaiman Ab Ghani
- Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11800 USM P. Pinang, Malaysia; E-Mails: (T.F.T.); (A.S.)
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31
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Development of a potassium-selective optode for hydroponic nutrient solution monitoring. Anal Chim Acta 2012; 737:72-82. [DOI: 10.1016/j.aca.2012.05.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 05/15/2012] [Accepted: 05/16/2012] [Indexed: 11/23/2022]
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32
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Tahir TF, Salhin A, Saad B, Ab Ghani S. The 4-(Dimethylamino) benzaldehyde-4-ethylthiosemicarbazone as Ionophore for Mercury(II) Solid State Selective Electrode. ELECTROANAL 2012. [DOI: 10.1002/elan.201100724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Almeida S, Moreira F, Heitor A, Montenegro M, Aguilar G, Sales M. Sulphonamide-imprinted sol–gel materials as ionophores in potentiometric transduction. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.08.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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34
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Selective transport of zinc and copper ions by synthetic ionophores using liquid membrane technology. J INCL PHENOM MACRO 2011. [DOI: 10.1007/s10847-011-0087-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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35
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Kamel AH, Coelho Moreira FT, Rebelo TSR, Sales MGF. Molecularly-Imprinted Materials for Potentiometric Transduction: Application to the Antibiotic Enrofloxacin. ANAL LETT 2011. [DOI: 10.1080/00032719.2010.546021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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36
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Tonelli D, Ballarin B, Guadagnini L, Mignani A, Scavetta E. A novel potentiometric sensor for l-ascorbic acid based on molecularly imprinted polypyrrole. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.05.076] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Biomimetic sensors of molecularly-imprinted polymers for chlorpromazine determination. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.04.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Ansari R, Delavar AF, Aliakbar A, Mohammad-khah A. Solid-state Cu (II) ion-selective electrode based on polyaniline-conducting polymer film doped with copper carmoisine dye complex. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1436-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Qin X, Wang H, Miao Z, Wang X, Fang Y, Chen Q, Shao X. Synthesis of silver nanowires and their applications in the electrochemical detection of halide. Talanta 2011; 84:673-8. [DOI: 10.1016/j.talanta.2011.01.064] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 01/23/2011] [Accepted: 01/27/2011] [Indexed: 02/03/2023]
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40
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Trimethoprim-selective electrodes with molecularly imprinted polymers acting as ionophores and potentiometric transduction on graphite solid-contact. Microchem J 2011. [DOI: 10.1016/j.microc.2010.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Cell-based electrochemical biosensors for water quality assessment. Anal Bioanal Chem 2011; 400:947-64. [PMID: 21424523 DOI: 10.1007/s00216-011-4816-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 02/11/2011] [Accepted: 02/16/2011] [Indexed: 12/19/2022]
Abstract
During recent decades, extensive industrialisation and farming associated with improper waste management policies have led to the release of a wide range of toxic compounds into aquatic ecosystems, causing a rapid decrease of world freshwater resources and thus requiring urgent implementation of suitable legislation to define water remediation and protection strategies. In Europe, the Water Framework Directive aims to restore good qualitative and quantitative status to all water bodies by 2015. To achieve that, extensive monitoring programmes will be required, calling for rapid, reliable and cost-effective analytical methods for monitoring and toxicological impact assessment of water pollutants. In this context, whole cell biosensors appear as excellent alternatives to or techniques complementary to conventional chemical methods. Cells are easy to cultivate and manipulate, host many enzymes able to catalyse a wide range of biological reactions and can be coupled to various types of transducers. In addition, they are able to provide information about the bioavailability and the toxicity of the pollutants towards eukaryotic or prokaryotic cells. In this article, we present an overview of the use of whole cells, mainly bacteria, yeasts and algae, as sensing elements in electrochemical biosensors with respect to their practical applications in water quality monitoring, with particular emphasis on new trends and future perspectives. In contrast to optical detection, electrochemical transduction is not sensitive to light, can be used for analysis of turbid samples and does not require labelling. In some cases, it is also possible to achieve higher selectivities, even without cell modification, by operating at specific potentials where interferences are limited.
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42
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Guerreiro J, Freitas V, Sales M. New sensing materials of molecularly-imprinted polymers for the selective recognition of Chlortetracycline. Microchem J 2011. [DOI: 10.1016/j.microc.2010.08.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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43
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Oliveira HM, Moreira FT, Sales MGF. Ciprofloxacin-imprinted polymeric receptors as ionophores for potentiometric transduction. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.11.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
A biosensor is a sensing device that incorporates a biological sensing element and a transducer to produce electrochemical, optical, mass, or other signals in proportion to quantitative information about the analytes in the given samples. The microfluidic chip is an attractive miniaturized platform with valuable advantages, e.g., low cost analysis requiring low reagent consumption, reduced sample volume, and shortened processing time. Combination of biosensors and microfluidic chips enhances analytical capability so as to widen the scope of possible applications. This review provides an overview of recent research activities in the field of biosensors integrated on microfluidic chips, focusing on the working principles, characteristics, and applicability of the biosensors. Theoretical background and applications in chemical, biological, and clinical analysis are summarized and discussed.
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Oztekin Y, Ramanaviciene A, Yazicigil Z, Solak AO, Ramanavicius A. Direct electron transfer from glucose oxidase immobilized on polyphenanthroline-modified glassy carbon electrode. Biosens Bioelectron 2010; 26:2541-6. [PMID: 21146394 DOI: 10.1016/j.bios.2010.11.001] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Revised: 10/28/2010] [Accepted: 11/07/2010] [Indexed: 11/26/2022]
Abstract
This study reports direct electron transfer (DET) from immobilized glucose oxidase (GOx) via grafted and electropolymerized 1,10-phenanthroline monohydrate (PMH). The layer of poly-1,10-phenanthroline (PPMH) was gained via electrochemical deposition, which was used to create the PPMH-modified GC-electrode (PPMH/GC-electrode). Further, the GOx was immobilized on the PPMH/GC-electrode. The effect of surface-modification by the PPMH on the electron-transfer between enzyme and electrode-surface and some other electrochemical/analytical-parameters of newly designed enzymatic-electrode were evaluated. The PPMH/GC-electrode showed superior DET to/from flavine adenine dinucleotide cofactor of GOx, while some redox-compounds including ferrocene and K(3)[Fe(CN)(6)] were completely electrochemically inactive on the PPMH/GC-electrode. It was also found that the resulting GOx/PPMH/GC-electrode functioned as a "direct response type" glucose-biosensor. The biosensor showed excellent selectivity towards glucose and demonstrated good operational-stability. According to our best knowledge, this study is the first scientific report on electrochemical-polymerization of PMH on the GC-electrode in non-aqueous media followed by its application in the design of glucose-biosensor.
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Affiliation(s)
- Yasemin Oztekin
- NanoTechnas-Center of Nanotechnology and Materials Science, Vilnius University, Faculty of Chemistry, Naugarduko 24, Vilnius, Lithuania
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46
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Biomimetic norfloxacin sensors made of molecularly-imprinted materials for potentiometric transduction. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0464-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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47
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Selective recognition in potentiometric transduction of amoxicillin by molecularly imprinted materials. Eur Food Res Technol 2010. [DOI: 10.1007/s00217-010-1360-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Zamani HA, Rohani M, Zangeneh-Asadabadi A, Saleh Zabihi M, Ganjali MR, Salavati-Niasari M. A novel lutetium(III) PVC membrane sensor based on a new symmetric S–N Schiff's base for Lu(III) analysis in real sample. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.04.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Affiliation(s)
- Benjamin J Privett
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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50
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Flow-injection potentiometric applications of solid state Li+ selective electrode in biological and pharmaceutical samples. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1070-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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