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Proceedings Paper

Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff
Author(s): Claudia Gärtner; Werner Hoffmann; Horst Demattio; Thomas Clemens; Matthias Klotz; Richard Klemm; Holger Becker
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Paper Abstract

We present a compact portable chip-based capillary electrophoresis system that employs capacitively coupled contactless conductivity detection (C4D) operating at 4 MHz as an alternative detection method compared to the commonly used optical detection based on laser-induced fluorescence. Emphasis was put on system integration and industrial manufacturing technologies for the system. Therefore, the disposable chip for this system is fabricated out of PMMA using injection molding; the electrodes are screen-printed or thin-film electrodes. The system is designed for the measurement of small ionic species like Li+, Na+, K+, SO42- or NO3- typically present in foods like milk and mineral water as well as acids e.g. in wine.

Paper Details

Date Published: 27 April 2009
PDF: 6 pages
Proc. SPIE 7315, Sensing for Agriculture and Food Quality and Safety, 731505 (27 April 2009); doi: 10.1117/12.820316
Show Author Affiliations
Claudia Gärtner, Microfluidic ChipShop GmbH (Germany)
Werner Hoffmann, Forschungszentrum Karlsruhe (Germany)
Horst Demattio, Forschungszentrum Karlsruhe (Germany)
Thomas Clemens, Clemens GmbH (Germany)
Matthias Klotz, Clemens GmbH (Germany)
Richard Klemm, Microfluidic ChipShop GmbH (Germany)
Holger Becker, Microfluidic ChipShop GmbH (Germany)

Published in SPIE Proceedings Vol. 7315:
Sensing for Agriculture and Food Quality and Safety
Moon S. Kim; Shu-I Tu; Kaunglin Chao, Editor(s)

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