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Understanding Capacitively Coupled Contactless Conductivity Detection in Capillary and Microchip Electrophoresis. Part 1. Fundamentals

2005; Wiley; Volume: 17; Issue: 13 Linguagem: Inglês

10.1002/elan.200503237

1521-4109

José Geraldo Alves Brito-Neto, José Alberto Fracassi da Silva, Lucas Blanes, Claudimir Lúcio do Lago,

Electrochemical sensors and biosensors

ElectroanalysisVolume 17, Issue 13 p. 1198-1206 Full Paper Understanding Capacitively Coupled Contactless Conductivity Detection in Capillary and Microchip Electrophoresis. Part 1. Fundamentals José Geraldo Alves Brito-Neto, José Geraldo Alves Brito-Neto Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this authorJosé Alberto Fracassi da Silva, José Alberto Fracassi da Silva Departamento de Química Analítica, Instituto de Química, Universidade Estadual de Campinas, Cx. Postal 6154, CEP 13083-970, Campinas – SP, BrazilSearch for more papers by this authorLucas Blanes, Lucas Blanes Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this authorClaudimir Lucio do Lago, Claudimir Lucio do Lago [email protected] Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this author José Geraldo Alves Brito-Neto, José Geraldo Alves Brito-Neto Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this authorJosé Alberto Fracassi da Silva, José Alberto Fracassi da Silva Departamento de Química Analítica, Instituto de Química, Universidade Estadual de Campinas, Cx. Postal 6154, CEP 13083-970, Campinas – SP, BrazilSearch for more papers by this authorLucas Blanes, Lucas Blanes Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this authorClaudimir Lucio do Lago, Claudimir Lucio do Lago [email protected] Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, CEP 05508-900, São Paulo - SP, BrazilSearch for more papers by this author First published: 07 July 2005 https://doi.org/10.1002/elan.200503237Citations: 217AboutPDF 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 Capacitively coupled contactless conductivity detection (C4D) is presented in a progressively detailed approach. Through different levels of theoretical and practical complexity, several aspects related to this kind of detection are addressed, which should be helpful to understand the results as well as to design a detector or plan experiments. Simulations and experimental results suggest that sensitivity depends on: 1) the electrolyte co-ion and counter-ion; 2) cell geometry and its positioning; 3) operating frequency. Undesirable stray capacitance formed due to the close placement of the electrodes is of great importance to the optimization of the operating frequency and must be minimized. References 1 T. S. Burkhalter, High Frequency Conductometric (Impedimetric) Titrations, Elsevier, Amsterdam 1964, p. 215. 2 H. Zahn, Z. Physik 1928, 51, 350. 3 E. Pungor, F. Pál, K. Toth, Anal. 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