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Somnin C, Chamieh J, Saetear P, Cottet H. Taylor dispersion analysis using capacitively coupled contactless conductivity detector. Talanta 2024; 272:125815. [PMID: 38402737 DOI: 10.1016/j.talanta.2024.125815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/17/2024] [Accepted: 02/18/2024] [Indexed: 02/27/2024]
Abstract
Taylor dispersion analysis (TDA) is a simple and absolute method to determine the hydrodynamic radius of solutes that respond to UV or fluorescence detections. To broaden the application range of TDA, it is necessary to develop new detection modes. This study aims to study capacitively coupled contactless conductivity detector (C4D) for the analysis of charged macromolecules. The detection sensitivities and hydrodynamic radii were compared for a C4D detector and a UV detector on positively or negatively charged polymers responding both to UV and C4D (poly-L-lysine and poly(acrylamide-co-2-acrylamido-1-methyl-propanesulfonate). The influence of the composition of the background electrolyte on the detection sensitivity has been studied and optimized for C4D detection. The influence of the molar mass and of the polymer chemical charge density on the C4D and UV sensitivities of detection have been investigated based on well-characterized copolymers samples of different molar masses and charge densities. The advantages and disadvantages compared to UV detection, as well as the range of applicability of C4D detection in TDA were identified. C4D detection can be an alternative method for sizing charged polymers of reasonable molar mass (typically below 105 g mol-1) that do not absorb in UV. A decline in the sensitivity of detection in C4D was observed for higher molar masses.
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Affiliation(s)
| | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Ratchathewi District, Bangkok, 10110, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi District, Bangkok, 10400, Thailand.
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France.
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Mthembu SB, Akintayo DC, Moodley B, Gumbi BP. Development of gold plasmonic nanoparticles for detection of polydiallyldimethylammonium chloride at Umgeni water treatment plants: An optimised study and case application. Heliyon 2023; 9:e17136. [PMID: 37332960 PMCID: PMC10276230 DOI: 10.1016/j.heliyon.2023.e17136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 06/03/2023] [Accepted: 06/08/2023] [Indexed: 06/20/2023] Open
Abstract
Background Polydiallyldimethylammonium chloride (poly-(DADMAC) is used in many drinking water treatment plants in most parts of the world as a flocculant to remove suspended solids from raw water. However, it is very important that residual poly-(DADMAC) is monitored because it disintegrates into a carcinogenic compound known as N-nitrosodimethylamine (NDMA) during the treatment of drinking water. Methods In this work, the gold nanoparticle method is optimised for the detection of poly-(DADMAC), where the gold nanoparticles were stabilised with trisodium citrate and then used in quantifying poly-(DADMAC) by Ultraviolet-Visible-Near Infrared spectrophotometry. The optimised method was able to measure poly-(DADMAC) at low concentrations of 1.000 μg L-1 in drinking water with limits of detection and limits of quantification of 0.3302 and 1.101 μg L-1, respectively. Significant results The method was applied to two different water treatment plants and the concentration of poly-(DADMAC) found during stages of the water treatment process ranged from 1.013 to 33.63 μg L-1. The average poly-(DADMAC) concentrate concentration that is dosed for coagulation in Umgeni Water plant A was 7.889 μg L-1 while in plant B was 19.28 μg L-1. Residual poly-(DADMAC) concentration in drinking water was within the accepted limit of 50.00 μg L-1, regulated by the World Health Organisation (WHO).
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Affiliation(s)
- Sabelo B Mthembu
- School of Chemistry and Physics, University of KwaZulu-Natal, 54 University Road, Durban, 4001, South Africa
| | - Damilola Caleb Akintayo
- School of Chemistry and Physics, University of KwaZulu-Natal, 54 University Road, Durban, 4001, South Africa
- University of Colorado, Aurora, CO, United States
| | - Brenda Moodley
- School of Chemistry and Physics, University of KwaZulu-Natal, 54 University Road, Durban, 4001, South Africa
| | - Bhekumuzi P Gumbi
- School of Chemistry and Physics, University of KwaZulu-Natal, 54 University Road, Durban, 4001, South Africa
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Lavigne L, Choisnard L, Peyrin E, Oukacine F. Quantification of Ions and Organic Molecules, in Nanoliter Samples, in the Absence of Reference Materials. Anal Chem 2022; 94:15546-15552. [DOI: 10.1021/acs.analchem.2c03104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Laura Lavigne
- Université Grenoble Alpes, DPM, CNRS UMR 5063, F-38041Grenoble, France
| | - Luc Choisnard
- Université Grenoble Alpes, DPM, CNRS UMR 5063, F-38041Grenoble, France
| | - Eric Peyrin
- Université Grenoble Alpes, DPM, CNRS UMR 5063, F-38041Grenoble, France
| | - Farid Oukacine
- Université Grenoble Alpes, DPM, CNRS UMR 5063, F-38041Grenoble, France
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Read E, Lonetti B, Gineste S, Sutton AT, Di Cola E, Castignolles P, Gaborieau M, Mingotaud AF, Destarac M, Marty JD. Mechanistic insights into the formation of polyion complex aggregates from cationic thermoresponsive diblock copolymers. J Colloid Interface Sci 2021; 590:268-276. [PMID: 33548610 DOI: 10.1016/j.jcis.2021.01.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/11/2020] [Accepted: 01/10/2021] [Indexed: 11/30/2022]
Abstract
HYPOTHESIS The formation of polyion complexes (PICs) comprising thermoresponsive polymers is intended to result in the formation of aggregates that undergo significant structural changes with temperature. Moreover the observed modifications might be critically affected by polymer structure and PICs composition. EXPERIMENTS Different block copolymers based on cationic poly(3-acrylamidopropyltrimethylammonium chloride) and thermoresponsive poly(N-isopropylacrylamide) were synthesized by aqueous RAFT/MADIX polymerization at room temperature. Addition of poly(acrylic acid) in a controlled fashion led to the formation of PICs aggregates. The structural changes induced by temperature were characterized by differential scanning calorimetry, Nuclear Magnetic Resonance spectroscopy and scattering methods. FINDINGS Thermoresponsive PICs undergo significant structural changes when increasing temperature above the cloud point of the thermoresponsive block. The reversibility of these phenomena depends strongly on the structural parameters of the block copolymers and on PICs composition.
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Affiliation(s)
- E Read
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - B Lonetti
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - S Gineste
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - A T Sutton
- Western Sydney University, ACROSS, School of Science, Locked Bag 1797, Penrith, NSW 2751, Australia; Future Industries Institute, University of South Australia, P.O. Box 2471, Adelaide, South Australia 5001, Australia
| | | | - P Castignolles
- Western Sydney University, ACROSS, School of Science, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - M Gaborieau
- Western Sydney University, ACROSS, School of Science, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - A-F Mingotaud
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - M Destarac
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
| | - J-D Marty
- Laboratoire des IMRCP, Université Paul Sabatier, CNRS, UMR 5623, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
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Novel on-site residual screening of poly-diallyldimethylammonium chloride in treated potable water using gold nanoparticle based lovibond color filters. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Tan Y, Song Q, Liu W, Li M, Xiao J, Chen C. Dual-channel Microchip Electrophoresis with Amperometric Detection System for Rapid Analysis of Cefoperazone and Sulbactam. ANAL SCI 2019; 35:1103-1109. [PMID: 31231088 DOI: 10.2116/analsci.19p088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A dual-channel microchip electrophoresis (ME) with in-channel amperometric detection was developed for cefoperazone and sulbactam determination simultaneously. In this study, a microelectrode detector was made of gold nanoparticles (GNPs) modified indium tin oxide (ITO)-coated poly-ethylene terephthalate (PET) film. The parameters including detection potential applied on working electrode, buffer concentration and pH value were optimized to improve the detection sensitivity and separation efficiency of cefoperazone and sulbactam. Under the optimal conditions, sensitive detection of cefoperazone and sulbactam was obtained with limits of detection (LODs) (S/N = 3) of 0.52 and 0.75 μg/mL, respectively. The plasma sample, which was from a patient with a brain injury taking Sulperazone, was successfully detected with a simple sample pretreatment process by dual-channel ME amperometric detection. This rapid and sensitive method possesses practical potential in clinical applications, and could provide a guidance for clinical rational drug use.
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Affiliation(s)
- Yan Tan
- Xiangya School of Pharmaceutical Sciences, Central South University
| | - Qianhui Song
- Xiangya School of Pharmaceutical Sciences, Central South University
| | - Wenfang Liu
- Xiangya School of Pharmaceutical Sciences, Central South University
| | - Ming Li
- School of Environmental Science and Engineering, Yangzhou University
| | - Jian Xiao
- Department of Pharmacy, Xiangya Hospital, Central South University
| | - Chuanpin Chen
- Xiangya School of Pharmaceutical Sciences, Central South University
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Benavidez TE, Garcia CD. Spectroscopic ellipsometry as a complementary tool to characterize coatings on PDMS for CE applications. Electrophoresis 2016; 37:2509-2516. [DOI: 10.1002/elps.201600143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/20/2016] [Accepted: 05/20/2016] [Indexed: 11/11/2022]
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TRISARANAKUL W, CHOMPOOSOR A, MANEEPRAKORN W, NACAPRICHA D, CHOENGCHAN N, TEERASONG S. A Simple and Rapid Method Based on Anti-aggregation of Silver Nanoparticles for Detection of Poly(diallyldimethylammonium chloride) in Tap Water. ANAL SCI 2016; 32:769-73. [DOI: 10.2116/analsci.32.769] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Wichaya TRISARANAKUL
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
| | - Apiwat CHOMPOOSOR
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University
| | - Weerakanya MANEEPRAKORN
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA)
| | - Duangjai NACAPRICHA
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University
| | - Nathawut CHOENGCHAN
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
| | - Saowapak TEERASONG
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
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Sutton AT, Read E, Maniego AR, Thevarajah JJ, Marty JD, Destarac M, Gaborieau M, Castignolles P. Purity of double hydrophilic block copolymers revealed by capillary electrophoresis in the critical conditions. J Chromatogr A 2014; 1372C:187-195. [DOI: 10.1016/j.chroma.2014.10.105] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 10/28/2014] [Accepted: 10/29/2014] [Indexed: 10/24/2022]
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Elbashir AA, Aboul-Enein HY. Recent applications and developments of capacitively coupled contactless conductivity detection (CE-C4D) in capillary electrophoresis. Biomed Chromatogr 2014; 28:1502-6. [DOI: 10.1002/bmc.3230] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/28/2014] [Accepted: 04/01/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Abdalla A. Elbashir
- Faculty of Science, Chemistry Department; University of Khartoum; PO Box 321 Khartoum 11115 Sudan
| | - Hassan Y. Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical and Drug Industries Research Division; National Research Centre; Dokki Cairo 12311 Egypt
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Kubáň P, Hauser PC. Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012. Electrophoresis 2012; 34:55-69. [DOI: 10.1002/elps.201200358] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 08/08/2012] [Accepted: 08/09/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Pavel Kubáň
- Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic; Brno; Czech Republic
| | - Peter C. Hauser
- Department of Chemistry; University of Basel; Basel; Switzerland
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