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Voltammetric pH Measurements Using Azure A-Containing Layer-by-Layer Film Immobilized Electrodes. Polymers (Basel) 2020; 12:polym12102328. [PMID: 33053708 PMCID: PMC7599638 DOI: 10.3390/polym12102328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/02/2020] [Accepted: 10/07/2020] [Indexed: 01/05/2023] Open
Abstract
pH is one of the most important properties associated with an aqueous solution and various pH measurement techniques are available. In this study, Azure A-modified poly(methacrylic acid) (AA-PMA) was synthesized used to prepare a layer-by-layer deposited film with poly(allylamine hydrochloride) (PAH) on a glassy carbon electrode via electrostatic interactions and the multilayer film-immobilized electrode was used to measure pH. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurement were performed. Consequently, the oxidation potential of AA on the electrode changed with pH. As per Nernst's equation, because H+ ions are involved in the redox reaction, the peak potential shifted depending on the pH of the solution. The peak potential shifts are easier to detect by DPV than CV measurement. Accordingly, using electrochemical responses, the pH was successfully measured in the pH range of 3 to 9, and the electrodes were usable for 50 repeated measurements. Moreover, these electrochemical responses were not affected by interfering substances.
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Adam V, Vaculovicova M. CE and nanomaterials - Part II: Nanomaterials in CE. Electrophoresis 2017; 38:2405-2430. [DOI: 10.1002/elps.201700098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Vojtech Adam
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Marketa Vaculovicova
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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Currie CA, Woods CD, Stanley FE, Stalcup AM. CHIRAL SEPARATIONS USING HEPARIN AND POLYELECTROLYTE MULTILAYERS IN CAPILLARY ELECTROPHORESIS. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.830266] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- C. A. Currie
- a Department of Chemistry , College of Mount St. Joseph , Cincinnati , Ohio , USA
| | - C. D. Woods
- a Department of Chemistry , College of Mount St. Joseph , Cincinnati , Ohio , USA
| | - F. E. Stanley
- b Department of Chemistry , University of Cincinnati , Cincinnati , Ohio , USA
| | - A. M. Stalcup
- b Department of Chemistry , University of Cincinnati , Cincinnati , Ohio , USA
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López-Lorente ÁI, Valcárcel M. Separation Techniques of Gold Nanoparticles. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63285-2.00009-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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5
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Zhang F, Zhang L, Xing J, Tang Y, Chen Y, Zhou Y, Lu T, Xia X. Layer-By-Layer Self-Assembly of Sulphydryl-Functionalized Multiwalled Carbon Nanotubes and Phosphate-Functionalized Gold Nanoparticles: Detection of Hydrazine. Chempluschem 2012. [DOI: 10.1002/cplu.201200137] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Yang C, Chang C, Wang J, Qu Q, Hu X, Wang Y. Monitoring Organic Reactions by Micellar Electrokinetic Chromatography. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/945198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A method was established to monitor organic reactions by micellar capillary electrokinetic chromatography (MEKC). After optimizing conditions such as the composition of the solvents, the surfactant, and the apparent pH (pH*) of the system, the method was utilized to analyze the reaction of glycidyl methacrylate (GMA) and allyl amine. The main products were identified in the electropherograms. The reaction procedure was monitored in real time. This method was found to have common applicability, being able to separate and detect nonaqueous soluble, nonionic, and low-UV-Vis absorbance compounds. It provides a rapid and low-cost way to understand organic reactions and to direct synthesis works.
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Affiliation(s)
- Chun Yang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
- Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
| | - Chunyang Chang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Jun Wang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Qishu Qu
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Xiaoya Hu
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Yang Wang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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Kubáň P, Timerbaev AR. CE of inorganic species - A review of methodological advancements over 2009-2010. Electrophoresis 2011; 33:196-210. [DOI: 10.1002/elps.201100357] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Revised: 07/30/2011] [Accepted: 07/30/2011] [Indexed: 01/13/2023]
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Li M, Liu X, Jiang F, Guo L, Yang L. Enantioselective open-tubular capillary electrochromatography using cyclodextrin-modified gold nanoparticles as stationary phase. J Chromatogr A 2011; 1218:3725-9. [DOI: 10.1016/j.chroma.2011.04.045] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 04/12/2011] [Accepted: 04/17/2011] [Indexed: 10/18/2022]
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9
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Permanent gold nanoparticle coatings on polyelectrolyte multilayer modified capillaries for open-tubular capillary electrochromatography. J Chromatogr A 2010; 1217:6588-94. [DOI: 10.1016/j.chroma.2010.08.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 08/11/2010] [Accepted: 08/23/2010] [Indexed: 11/21/2022]
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10
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Affiliation(s)
- Nicholas W. Frost
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Meng Jing
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Michael T. Bowser
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
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Fujii N, Fujimoto K, Michinobu T, Akada M, Hill JP, Shiratori S, Ariga K, Shigehara K. The Simplest Layer-by-Layer Assembly Structure: Best Paired Polymer Electrolytes with One Charge per Main Chain Carbon Atom for Multilayered Thin Films. Macromolecules 2010. [DOI: 10.1021/ma100473j] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Nozomu Fujii
- Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Kouji Fujimoto
- Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan
| | - Tsuyoshi Michinobu
- Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
- Global Edge Institute, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Misaho Akada
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) and JST, CREST, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Jonathan P. Hill
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) and JST, CREST, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Seimei Shiratori
- Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan
| | - Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) and JST, CREST, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Kiyotaka Shigehara
- Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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