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Proceedings Paper

A new injection method for soil nutrient analysis in capillary electrophoresis
Author(s): M. Smolka; D. Puchberger-Enengl; M. Bipoun; G. Fercher; A. Klasa; C. Krutzler; F. Keplinger; M. J. Vellekoop
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Paper Abstract

We present a new method for the direct injection of liquid sample into a capillary electrophoresis (CE) device. Instead of a double-T injection mechanism, a single inlet provided with a membrane filter is used. From a reservoir on top of this inlet, the liquid directly enters the separation channel through the membrane. The driving force is a short electrical pulse. This avoids an additional sample channel, so that the chip needs only three microfluidic connects and no mechanical sample pumping is demanded. The high injection reproducibility and the comparatively simple setup open up the way for mobile application of soil analysis.

Paper Details

Date Published: 17 May 2013
PDF: 7 pages
Proc. SPIE 8763, Smart Sensors, Actuators, and MEMS VI, 87631C (17 May 2013); doi: 10.1117/12.2018098
Show Author Affiliations
M. Smolka, Vienna Univ. of Technology (Austria)
D. Puchberger-Enengl, Vienna Univ. of Technology (Austria)
M. Bipoun, Univ. Bremen (Germany)
G. Fercher, Vienna Univ. of Technology (Austria)
A. Klasa, Warmia and Mazury Univ. in Olsztyn (Poland)
C. Krutzler, Integrated Microsystems Austria GmbH (Austria)
F. Keplinger, Vienna Univ. of Technology (Austria)
M. J. Vellekoop, Univ. Bremen (Germany)

Published in SPIE Proceedings Vol. 8763:
Smart Sensors, Actuators, and MEMS VI
Ulrich Schmid; José Luis Sánchez de Rojas Aldavero; Monika Leester-Schaedel, Editor(s)

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