Mazzeo Brian A, Chandra Satyan, Mellor Brett L, Arellano Jesus
Department of Electrical and Computer Engineering, Brigham Young University, Clyde Building, Provo, Utah 84602, USA.
Rev Sci Instrum. 2010 Dec;81(12):125103. doi: 10.1063/1.3509388.
A liquid impedance cell for broadband impedance measurements up to 110 MHz is presented. The design incorporates temperature control and minimizes parasitic capacitance and inductance. The cell is simple to fabricate and uses chemically resistant materials, stainless steel, and Teflon. This dielectric cell can be used in a variety of liquid measurements, particularly those related to impedance measurements of biological objects in solution. Temperature control is illustrated in measurements of the permittivity of deionized water from 5 to 55 °C. Numerical fitting procedures employed on the relaxation curves indicate good agreement with previous studies on beta-lactoglobulin and hen lysozyme. Titration capability is demonstrated through dielectric titration of hen lysozyme and beta-lactoglobulin.
