A new injection method for soil nutrient analysis in capillary electrophoresis

M. Smolka; D. Puchberger-Enengl; M. Bipoun; G. Fercher; A. Klasa; C. Krutzler; F. Keplinger; M. J. Vellekoop

doi:10.1117/12.2018098

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17 May 2013 A new injection method for soil nutrient analysis in capillary electrophoresis

M. Smolka, D. Puchberger-Enengl, M. Bipoun, G. Fercher, A. Klasa, C. Krutzler, F. Keplinger, M. J. Vellekoop

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Proceedings Volume 8763, Smart Sensors, Actuators, and MEMS VI; 87631C (2013) https://doi.org/10.1117/12.2018098
Event: SPIE Microtechnologies, 2013, Grenoble, France

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.

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M. Smolka, D. Puchberger-Enengl, M. Bipoun, G. Fercher, A. Klasa, C. Krutzler, F. Keplinger, and M. J. Vellekoop "A new injection method for soil nutrient analysis in capillary electrophoresis", Proc. SPIE 8763, Smart Sensors, Actuators, and MEMS VI, 87631C (17 May 2013); https://doi.org/10.1117/12.2018098

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