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Publication Citation: Contactless Differential Conductivity Detection

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Author(s): Gordon A. Shaw; David J. Ross; Steven E. Fick; Wyatt N. Vreeland;
Title: Contactless Differential Conductivity Detection
Published: October 12, 2008
Abstract: We propose a new technique, contactless differential conductivity detection (CDCD,) to improve the detection limit of contactless conductivity detection for capillary and microchannel electrophoresis. By exploiting a 3-electrode differential configuration, CDCD greatly reduces the dominant noise source in contactless conductivity detection: temperature fluctuations within the measurement system. This will be a particularly important feature for high-conductivity samples, which are most susceptible to thermal noise. The reduced sensitivity of CDCD to temperature fluctuations and its potential suitability for low-power operation will also make this an excellent candidate for field-portable and point-of-application uses where optical detection strategies may be more difficult to implement.
Conference: microTAS 2008
Proceedings: Proceedings of microTAS 2008
Pages: 3 pp.
Location: San Diego, CA
Dates: October 12-16, 2008
Keywords: contactless conductivity detection; detector; electrophoresis
Research Areas: Nanomanufacturing
PDF version: PDF Document Click here to retrieve PDF version of paper (378KB)