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Issue 1, 2003
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Measurement of density and chemical concentration using a microfluidic chip

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Abstract

A new microfluidic product for measuring fluid density, specific gravity and chemical concentration has been developed. At the core of this lab-on-a-chip sensor is a vacuum-sealed resonating silicon microtube. Measurements can be made with under a microliter of sample fluid, which is over 1000× less than is conventionally required. Since the product is MEMS-based the overall system size is a fraction of conventional density meters and it weighs much less than the traditional desk-top, temperature controlled, density meters. The syringe or pipette loaded system includes a dynamic temperature control system that operates between 0 °C and 90 °C with an accuracy of less than 0.01 °C. Density measurement accuracies of 4 to 5 digits have been observed with aqueous solutions. Measurement examples and applications will be discussed.

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Article information


Submitted
20 Nov 2002
Accepted
10 Jan 2003
First published
03 Feb 2003

Lab Chip, 2003,3, 19-21
Article type
Paper

Measurement of density and chemical concentration using a microfluidic chip

D. Sparks, R. Smith, M. Straayer, J. Cripe, R. Schneider, A. Chimbayo, S. Anasari and N. Najafi, Lab Chip, 2003, 3, 19
DOI: 10.1039/B211429A

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