Title: A Contactless Conductometric Detector with Easily Exchangeable Capillary for Capillary Electrophoresis
Abstract: ElectroanalysisVolume 13, Issue 12 p. 989-992 Article A Contactless Conductometric Detector with Easily Exchangeable Capillary for Capillary Electrophoresis Petr Tůma, Petr Tůma UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this authorFrantišek Opekar, Corresponding Author František Opekar [email protected] UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicUNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this authorIvan Jelínek, Ivan Jelínek UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this author Petr Tůma, Petr Tůma UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this authorFrantišek Opekar, Corresponding Author František Opekar [email protected] UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicUNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this authorIvan Jelínek, Ivan Jelínek UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech RepublicSearch for more papers by this author First published: 09 August 2001 https://doi.org/10.1002/1521-4109(200108)13:12<989::AID-ELAN989>3.0.CO;2-CCitations: 56AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract An alternative construction of a contactless conductivity detector in which semitubular instead of tubular electrodes were used is described. The electrodes are made of a strip of aluminium foil formed into a semitubular shape. They are positioned between two Plexiglass plates in a groove matching the outer diameter of a separation capillary. One Plexiglass plate is immovable, the other is free and can be detached from the immovable plate after the fixing screws are released. The separation capillary is inserted between the plates into the groove and flattened to the electrodes by the tightening of the fixing screws. This construction permits a simple exchange of the separation capillary and makes the connection of individual electrodes with the detector electronics easier and more reliable. The detector performance was tested under the electrophoretic conditions using model sample solutions of potassium chloride in the concentration range from 10−3 to 10−8 mol/L. It was shown (for K+ ion) that the operational characteristics of the detector with semitubular electrodes, namely dynamic range, 0.5–1000 μM, linear dynamic range, 5–1000 μM, limit of detection, 0.5 μM (LOD here represents the concentration from that the detector signal ceases to change with further concentration decrease) and sensitivity (1.2 mV/pg), are comparable with those for the detectors with common tubular electrodes. References 1 T. Kappes, P. C. Hauser, Electroanalysis 2000, 12, 165. 2 B. Gaš, M. Demjanenko, J. Vacík, J. Chromatogr. 1980, 192, 253. 3 J. Vacík, J. Zuska, I. Muselasová, J. Chromatogr. 1985, 320, 233. 4 T. Hirokawa, Q. Mao, N. Ikuta, B. Gaš, Chromatography 1998, 19, 9. 5 M. Masár, R. Bodor, D. Kanianský, J. Chromatogr. A 1999, 834, 179. 6 D. Kanianský, V. Zelenská, M. Masár, F. Iványi, Š. Gazdíková, J. Chromatogr. A 1999, 844, 349. 7 A. J. Zemann, E. Schnell, D. Volgger, G. K. Bonn, Anal. Chem. 1998, 70, 563. 8 J. A. F. da Silva, C. L. do Lago, Anal. Chem. 1998, 70, 4339. 9 K. Mayrhofer, A. J. Zemann, E. Schnell, G. K. Bonn, Anal. Chem. 1999, 71, 3828. 10 E. Pungor, Oscillometry and Conductometry, Pergamon Press, Oxford 1965. 11 T. Chvojka, I. Jelínek, F. Opekar, K. Štulík, Anal. Chim. Acta 2001, 433, 13. 12 A. T. Woolley, K. Q. Lao, A. N. Glazer, R. A. Mathies, Anal. Chem. 1998, 70, 684. Citing Literature Volume13, Issue12August 2001Pages 989-992 ReferencesRelatedInformation
Publication Year: 2001
Publication Date: 2001-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 63
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