Portable CE system with contactless conductivity detection in an injection molded polymer chip for on-site food analysis

Holger Becker; Holger Mühlberger; Werner Hoffmann; Thomas Clemens; Richard Klemm; Claudia Gärtner

doi:10.1117/12.773579

13 February 2008 Portable CE system with contactless conductivity detection in an injection molded polymer chip for on-site food analysis

Holger Becker, Holger Mühlberger, Werner Hoffmann, Thomas Clemens, Richard Klemm, Claudia Gärtner

Author Affiliations +

Proceedings Volume 6886, Microfluidics, BioMEMS, and Medical Microsystems VI; 68860C (2008) https://doi.org/10.1117/12.773579
Event: MOEMS-MEMS 2008 Micro and Nanofabrication, 2008, San Jose, California, 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 employing laser-induced fluorescence. 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 allows the measurement of small ions like Li, Na, K typically present in foodstuff like milk and mineral water as well as acids in wine.

Citation Download Citation

Holger Becker, Holger Mühlberger, Werner Hoffmann, Thomas Clemens, Richard Klemm, and Claudia Gärtner "Portable CE system with contactless conductivity detection in an injection molded polymer chip for on-site food analysis", Proc. SPIE 6886, Microfluidics, BioMEMS, and Medical Microsystems VI, 68860C (13 February 2008); https://doi.org/10.1117/12.773579

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