Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff

Claudia Gärtner; Werner Hoffmann; Horst Demattio; Thomas Clemens; Matthias Klotz; Richard Klemm; Holger Becker

doi:10.1117/12.820316

27 April 2009 Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff

Claudia Gärtner, Werner Hoffmann, Horst Demattio, Thomas Clemens, Matthias Klotz, Richard Klemm, Holger Becker

Author Affiliations +

Proceedings Volume 7315, Sensing for Agriculture and Food Quality and Safety; 731505 (2009) https://doi.org/10.1117/12.820316
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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⁺, SO₄^2- or NO₃^- typically present in foods like milk and mineral water as well as acids e.g. in wine.

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Claudia Gärtner, Werner Hoffmann, Horst Demattio, Thomas Clemens, Matthias Klotz, Richard Klemm, and Holger Becker "Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff", Proc. SPIE 7315, Sensing for Agriculture and Food Quality and Safety, 731505 (27 April 2009); https://doi.org/10.1117/12.820316

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