Using micromechanical resonators to measure rheological properties and alcohol content of model solutions and commercial beverages.
Micromechanic resonators provide a small-volume and potentially high-throughput method to determine rheological properties of fluids. Here we explore the accuracy in measuring mass density and viscosity of ethanol-water and glycerol-water model solutions, using a simple and easily implemented model to deduce the hydrodynamic effects on resonating cantilevers of various length-to-width aspect ratios. We next show that these measurements can be extended to determine the alcohol percentage of both model solutions and commercial beverages such as beer, wine and liquor. This demonstrates how micromechanical resonators can be used for quality control of every-day drinks.
London Centre for Nanotechnology, Department of Physics, University College London, 17-19 Gordon Street, London WC1H 0AH, UK. r.paxman@ucl.ac.uk
Rosemary
R
Paxman
Jake
J
Stinson
Anna
A
Dejardin
Rachel A
RA
McKendry
Bart W
BW
Hoogenboom
D001628:Beverages / Q000032:analysis*; D000431:Ethanol / Q000032:analysis*; D008962:Models, Theoretical; D012212:Rheology; D012996:Solutions
D012996:Solutions; D000431:Ethanol