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Liang Y, Hu S, Zhang Q, Zhang D, Guo G, Wang X. Determination of Nanoplastics Using a Novel Contactless Conductivity Detector with Controllable Geometric Parameters. Anal Chem 2022; 94:1552-1558. [DOI: 10.1021/acs.analchem.1c02752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yingqi Liang
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
| | - Siqi Hu
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
| | - Qi Zhang
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
| | - Dongtang Zhang
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
| | - Guangsheng Guo
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
| | - Xiayan Wang
- Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, China
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2
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Zhu G, Bao C, Liu W, Yan X, Liu L, Xiao J, Chen C. Rapid Detection of AGs using Microchip Capillary Electrophoresis Contactless Conductivity Detection. CURR PHARM ANAL 2018. [DOI: 10.2174/1573412913666170918160004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background:
In order to realize current aminoglycosides supervision in food and environment,
our team improved the sensitivity and separation efficiency of the portable ITO detector, based on
the technology of microchip capillary electrophoresis and contactless conductivity detection.
Experiment:
Parameters (the separation voltage, buffer concentration, electrodes gap, elicitation frequency,
elicitation voltage) were optimized for the detection of three aminoglycosides, gentamicin,
kanamycin and streptomycin and the separation of their mixture in background electrolyte consists of
2-(N-Morpholino) ethanesulfonic acid (MES) and L-Histidine (His). The enhanced method was also
applied to other types of aminoglycosides.
Results:
Under optimal conditions, the monitoring of three types of aminoglycosides obtained such a
sensitive response that the limits of detection of gentamicin sulfate, kanamycin sulfate and streptomycin
sulfate were calculated as 3.1 µg/ml, 0.89 µg/ml and 0.96 µg/ml, at signal-to-noise ratio 3, respectively.
In addition they got separated completely from each other only in 40 s. The results of other varieties of
aminoglycosides including tobramycin sulfate and amikacin sulfate also met the standard.
Conclusion:
We successfully proposed here an unprecedentedly portable, miniaturized and rapid
microchip capillary electrophoresis contactless conductivity detection system to realize current
aminoglycosides supervision in food and environment.
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Affiliation(s)
- Gangzhi Zhu
- Haikou People's Hospital and Affiliated Haikou Hospital of Xiangya Medical School, Central South University, Haikou, Hainan 570208, China
| | - Chunjie Bao
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Wenfang Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Xingxing Yan
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Lili Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Jian Xiao
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan 410013, China
| | - Chuanpin Chen
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
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3
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YANG M, HUANG Z, CHANG J, YOU H. A Novel Solution-auto-introduction Electrophoresis Microchip Based on Capillary Force. ANAL SCI 2018; 34:1285-1290. [DOI: 10.2116/analsci.18p199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mingpeng YANG
- Institute of Intelligent Machines, Chinese Academy of Sciences
- University of Science and Technology of China
| | - Zhe HUANG
- Institute of Intelligent Machines, Chinese Academy of Sciences
- University of Science and Technology of China
| | - Jianguo CHANG
- Institute of Intelligent Machines, Chinese Academy of Sciences
- University of Science and Technology of China
| | - Hui YOU
- Institute of Intelligent Machines, Chinese Academy of Sciences
- University of Science and Technology of China
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4
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YANG MP, HUANG Z, XIE Y, YOU H. Development of Microchip Electrophoresis and Its Applications in Ion Detection. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2018. [DOI: 10.1016/s1872-2040(18)61085-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Zhao W, Wang B, Wang W. Biochemical sensing by nanofluidic crystal in a confined space. LAB ON A CHIP 2016; 16:2050-2058. [PMID: 27098158 DOI: 10.1039/c6lc00416d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Electrokinetics at nanoscale has attracted broad attention as a promising conductivity based biochemical sensing principle with a good selectivity. The nanoparticle crystal, formed by self-assembling nanoparticles inside a microstructure, has been utilized to fulfill a nanoscale electrokinetics based biochemical sensing platform, named nanofluidic crystal in our previous works. This paper introduces a novel nanofluidic crystal scheme by packing nanoparticles inside a well-designed confined space to improve the device-to-device readout consistency. A pair of electrodes was patterned at the bottom of this tunnel-shaped confined space for ionic current recording. The readout from different chips (n = 16) varied within 8.4% under the same conditions, which guaranteed a self-calibration-free biochemical sensing. Biotin and Pb(2+) were successfully detected by using nanofluidic crystal devices packed with streptavidin and DNAzyme modified nanoparticles, respectively. The limits of detection (LODs) were both 1 nM. This electrically readable nanofluidic crystal sensing approach may find applications in low cost and fast disease screening in limited resource environments.
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Affiliation(s)
- Wenda Zhao
- Institute of Microelectronics, Peking University, Beijing, 100871, China.
| | - Baojun Wang
- Institute of Microelectronics, Peking University, Beijing, 100871, China.
| | - Wei Wang
- Institute of Microelectronics, Peking University, Beijing, 100871, China. and National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Beijing, 100871, China and Innovation Center for Micro-Nano-electronics and Integrated System, Beijing, 100871, China
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6
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Heng W, Zhang W, Zhang Q, Wang H, Li Y. Photoelectrocatalytic microfluidic reactors utilizing hierarchical TiO2 nanotubes for determination of chemical oxygen demand. RSC Adv 2016. [DOI: 10.1039/c6ra09230f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel and highly sensitive microfluidic device which integrated hierarchical TiO2 nanotubes exhibited an improved detection efficiency for determination of COD.
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Affiliation(s)
- Weixin Heng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai 201620
- PR China
| | - Wei Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai 201620
- PR China
| | - Qinghong Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai 201620
- PR China
| | - Hongzhi Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai 201620
- PR China
| | - Yaogang Li
- Engineering Research Center of Advanced Glasses Manufacturing Technology
- MOE
- Donghua University
- Shanghai 201620
- PR China
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7
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Liu J, Wang L, Ouyang W, Wang W, Qin J, Xu Z, Xu S, Ge D, Wang L, Liu C, Wang L. Fabrication of PMMA nanofluidic electrochemical chips with integrated microelectrodes. Biosens Bioelectron 2015; 72:288-93. [DOI: 10.1016/j.bios.2015.05.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 05/10/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
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8
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Zhai H, Li J, Chen Z, Su Z, Liu Z, Yu X. A glass/PDMS electrophoresis microchip embedded with molecular imprinting SPE monolith for contactless conductivity detection. Microchem J 2014. [DOI: 10.1016/j.microc.2014.01.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Kechadi M, Sotta B, Chaal L, Tribollet B, Gamby J. A real time affinity biosensor on an insulated polymer using electric impedance spectroscopy in dielectric microchips. Analyst 2014; 139:3115-21. [DOI: 10.1039/c4an00212a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper demonstrates how a contactless microelectrode allows monitoring of the electric impedance changes provoked by the association of two protein ligands.
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Affiliation(s)
- Mohammed Kechadi
- CNRS
- UMR 8235
- Laboratoire Interface et Systèmes Electrochimiques, (LISE)
- F-75005 Paris, France
- Sorbonne Universités
| | - Bruno Sotta
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7622
- Laboratoire Biologie des Semences
- F-75005 Paris, France
| | - Lila Chaal
- Laboratoire d'Electrochimie
- Corrosion et de Valorisation Energétique (LECVE)
- Faculté de Technologie
- Université A. MIRA
- Béjaia 06000, Algeria
| | - Bernard Tribollet
- CNRS
- UMR 8235
- Laboratoire Interface et Systèmes Electrochimiques, (LISE)
- F-75005 Paris, France
- Sorbonne Universités
| | - Jean Gamby
- CNRS
- UMR 8235
- Laboratoire Interface et Systèmes Electrochimiques, (LISE)
- F-75005 Paris, France
- Sorbonne Universités
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10
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Li D, Li J, Jia X, Xia Y, Zhang X, Wang E. A novel Au–Ag–Pt three-electrode microchip sensing platform for chromium(VI) determination. Anal Chim Acta 2013; 804:98-103. [DOI: 10.1016/j.aca.2013.10.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 10/08/2013] [Accepted: 10/08/2013] [Indexed: 10/26/2022]
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11
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Kubáň P, Timerbaev AR. Inorganic analysis using CE: Advanced methodologies to face old challenges. Electrophoresis 2013; 35:225-33. [DOI: 10.1002/elps.201300302] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/19/2013] [Accepted: 08/19/2013] [Indexed: 12/28/2022]
Affiliation(s)
- Petr Kubáň
- Department of Bioanalytical Instrumentation; CEITEC - Masaryk University; Brno Czech Republic
| | - Andrei R. Timerbaev
- Vernadsky Institute of Geochemistry and Analytical Chemistry; Russian Academy of Sciences; Moscow Russia
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12
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Gaudry AJ, Breadmore MC, Guijt RM. In-plane alloy electrodes for capacitively coupled contactless conductivity detection in poly(methylmethacrylate) electrophoretic chips. Electrophoresis 2013; 34:2980-7. [PMID: 23925858 DOI: 10.1002/elps.201300256] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/07/2013] [Accepted: 07/12/2013] [Indexed: 11/07/2022]
Abstract
A simple method for producing PMMA electrophoresis microchips with in-plane electrodes for capacitively coupled contactless conductivity detection is presented. One PMMA plate (channel plate) is embossed with the microfluidic and electrode channels and lamination bonded to a blank PMMA cover plate of equal dimensions. To incorporate the electrodes, the bonded chip is heated to 80 °C, above the melting point of the alloy (≈ 70 °C) and below the glass transition temperature of the PMMA (≈ 105 °C), and the molten alloy drawn into the electrode channels with a syringe before being allowed to cool and harden. A 0.5 mm diameter stainless steel pin is then inserted into the alloy filled reservoirs of the electrode channels to provide external connection to the capacitively coupled contactless conductivity detection detector electronics. This advance provides for a quick and simple manufacturing process and negates the need for integrating electrodes using costly and time-consuming thin film deposition methods. No additional detector cell mounting structures were required and connection to the external signal processing electronics was achieved by simply slipping commercially available shielded adaptors over the pins. With a non-optimised electrode arrangement consisting of a 1 mm detector gap and 100 μm insulating distance, rapid separations of ammonium, sodium and lithium (<22 s) yielded LODs of approximately 1.5-3.5 ppm.
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Affiliation(s)
- Adam J Gaudry
- Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, Faculty of Science Engineering and Technology, University of Tasmania, Hobart, Tasmania, Australia
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13
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Monolithic integration of three-material microelectrodes for electrochemical detection on PMMA substrates. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.02.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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14
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Lounsbury JA, Landers JP. Ultrafast amplification of DNA on plastic microdevices for forensic short tandem repeat analysis. J Forensic Sci 2013; 58:866-74. [PMID: 23692541 DOI: 10.1111/1556-4029.12162] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 05/29/2012] [Accepted: 06/06/2012] [Indexed: 11/29/2022]
Abstract
The majority of microfluidic devices used as a platform for low-cost, rapid DNA analysis are glass devices; however, microchip fabrication in glass is costly and laborious, enhancing the interest in polymeric substrates, such as poly (methyl methacrylate) (PMMA), as an inexpensive alternative. Here, we report amplification in PMMA polymerase chain reaction (PCR) microchips providing full short tandem repeat profiles (16 of 16 loci) in 30-40 min, with peak height ratios and stutter percentages that meet literature threshold requirements. In addition, partial profiles (15 of 16 loci) were generated using an ultrafast PCR method in 17.1 min, representing a ~10-fold reduction in reaction time as compared to current amplification methods. Finally, a multichamber device was demonstrated to simultaneously amplify one positive, one negative, and five individual samples in 39 min. Although there were instances of loci dropout, this device represents a first step toward a microfluidic system capable of amplifying more than one sample simultaneously.
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Affiliation(s)
- Jenny A Lounsbury
- Department of Chemistry, University of Virginia, 409 McCormick Road, Charlottesville, VA 22904, USA
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15
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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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16
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A polydimethylsiloxane electrophoresis microchip with a thickness controllable insulating layer for capacitatively coupled contactless conductivity detection. Electrochem commun 2012. [DOI: 10.1016/j.elecom.2012.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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17
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Fang X, Zhang H, Zhang F, Jing F, Mao H, Jin Q, Zhao J. Real-time monitoring of strand-displacement DNA amplification by a contactless electrochemical microsystem using interdigitated electrodes. LAB ON A CHIP 2012; 12:3190-3196. [PMID: 22773155 DOI: 10.1039/c2lc40384f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper reports the design and implementation of a contactless conductivity detection system which combines a thermal control cell, a data processing system and an electrochemical (EC) cell for label-free isothermal nucleic acid amplification and real-time monitoring. The EC cell consists of a microchamber and interdigitated electrodes as the contactless conductivity biosensor with a cover slip as insulation. In our work, contactless EC measurements, the effects of trehalose on amplification, and chip surface treatment are investigated. With the superior performance of the biosensor, the device can detect the amount of pure DNA at concentrations less than 0.1 pg μl(-1). The EC cell, integrated with a heater and a temperature sensor, has successfully implemented nicking-based strand-displacement amplification at an initial concentration of 2.5 μM and the yields are monitored directly (dismissing the use of probes or labels) on-line. This contactless detector carries important advantages: high anti-interference capability, long detector life, high reusability and low cost. In addition, the small size, low power consumption and portability of the detection cell give the system the potential to be highly integrated for use in field service and point of care applications.
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Affiliation(s)
- Xinxin Fang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Science, China
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18
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Mark JJP, Scholz R, Matysik FM. Electrochemical methods in conjunction with capillary and microchip electrophoresis. J Chromatogr A 2012; 1267:45-64. [PMID: 22824222 DOI: 10.1016/j.chroma.2012.07.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/01/2012] [Accepted: 07/06/2012] [Indexed: 02/06/2023]
Abstract
Electromigrative techniques such as capillary and microchip electrophoresis (CE and MCE) are inherently associated with various electrochemical phenomena. The electrolytic processes occurring in the buffer reservoirs have to be considered for a proper design of miniaturized electrophoretic systems and a suitable selection of buffer composition. In addition, the control of the electroosmotic flow plays a crucial role for the optimization of CE/MCE separations. Electroanalytical methods have significant importance in the field of detection in conjunction with CE/MCE. At present, amperometric detection and contactless conductivity detection are the predominating electrochemical detection methods for CE/MCE. This paper reviews the most recent trends in the field of electrochemical detection coupled to CE/MCE. The emphasis is on methodical developments and new applications that have been published over the past five years. A rather new way for the implementation of electrochemical methods into CE systems is the concept of electrochemically assisted injection which involves the electrochemical conversions of analytes during the injection step. This approach is particularly attractive in hyphenation to mass spectrometry (MS) as it widens the range of CE-MS applications. An overview of recent developments of electrochemically assisted injection coupled to CE is presented.
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Affiliation(s)
- Jonas J P Mark
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Regensburg, Germany
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