creators_name: Evenhuis, CJ creators_name: Guijt, RM creators_name: Macka, M creators_name: Marriott, PJ creators_name: Haddad, PR creators_id: johne0@utas.edu.au creators_id: Rosanne.Guijt@utas.edu.au creators_id: Mirek.Macka@utas.edu.au creators_id: creators_id: Paul.Haddad@utas.edu.au type: article datestamp: 2008-04-06 23:32:32 lastmod: 2008-09-11 00:39:49 metadata_visibility: show title: Internal electrolyte temperatures for polymer and fused-silica capillaries used in capillary electrophoresis ispublished: pub subjects: 250000 subjects: 250401 subjects: 250400 full_text_status: restricted keywords: Capillary electrophoresis • Conductance • Joule heating • Polymer capillaries • Temperature note: published by Wiley-VCH Verlag Berlin abstract: Polymers are important as materials for manufacturing microfluidic devices for electro-driven separations, in which Joule heating is an unavoidable phenomenon. Heating effects were investigated in polymer capillaries using a CE setup. This study is the first step toward the longer-term objective of the study of heating effects occurring in polymeric microfluidic devices. The thermal conductivity of polymers is much smaller than that of fused silica (FS), resulting in less efficient dissipation of heat in polymeric capillaries. This study used conductance measurements as a temperature probe to determine the mean electrolyte temperatures in CE capillaries of different materials. Values for mean electrolyte temperatures in capillaries made of New Generation FluoroPolymer (NGFP), poly-(methylmethacrylate) (PMMA), and poly(ether ether ketone) (PEEK) capillaries were compared with those obtained for FS capillaries. Extrapolation of plots of conductance versus power per unit length (P/L) to zero power was used to obtain conductance values free of Joule heating effects. 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Wiley and Sons, Hobken 1999, p. v/93. 46 Polymicro Technologies, L., Phoenix, AZ 2005, p. Product CD. citation: Evenhuis, CJ and Guijt, RM and Macka, M and Marriott, PJ and Haddad, PR (2005) Internal electrolyte temperatures for polymer and fused-silica capillaries used in capillary electrophoresis. Electrophoresis, 26 (22). pp. 4333-4344. ISSN 0173-0835 document_url: http://eprints.utas.edu.au/3679/1/RMG13.pdf