A differential viscosity detector for use in miniaturized chemical separation systems

Blom, Marko T. and Chmela, Emil and Heyden van der, Frank H.J. and Oosterbroek, R. Edwin and Tijssen, Robert and Elwenspoek, Miko and Berg van den, Albert (2005) A differential viscosity detector for use in miniaturized chemical separation systems. Journal of Microelectromechanical Systems, 14 (1). pp. 70-80. ISSN 1057-7157

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Abstract:	We present a micromachined differential viscosity detector suitable for integration into an on-chip hydrodynamic chromatography system. The general design, however, is applicable to any liquid chromatography system that is used for separation of polymers. The micromachined part of the detector consists of a fluidic Wheatstone bridge and a low hydraulic capacitance pressure sensor of which the pressure sensing is based on optical detection of a membrane deflection. The stand-alone sensor shows a resolution in specific viscosity of 3/spl times/10/sup -3/, in which specific viscosity is defined as the increase in viscosity by a sample, relative to the baseline viscosity of a solvent.
Item Type:	Article
Copyright:	© 2005 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Transducers Science and Technology (TST) Biomedical and Environmental Sensor systems (BIOS)
Link to this item:	http://purl.utwente.nl/publications/50944
Official URL:	http://dx.doi.org/10.1109/JMEMS.2004.840452
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