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  • Richard Ludescher
  • Andrew Draganski
  • Jennifer Komaiko

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Project Title2011-142 Viscosity Determination Using FDA-Approved Fluorescent Food Dyes
Track Code2011-142
Websitehttp://otc.rutgers.edu
Short Description

Rutgers scientists have developed a unique method for determining the viscosity of substances, in particular food substances, using monoazo, FDA-approved food dyes. More specifically, the method involves measuring the fluorescence emitted by the monoazo food dyes. These dyes are essentially non-fluorescent in low viscosity fluids but are fluorescent in viscous foods. Thus, the fluorescence (either the measured emission intensity or the measured lifetime) can be used as a viscosity indicator.

Abstract

Rutgers scientists have developed a unique method for determining the viscosity of substances, in particular food substances, using monoazo, FDA-approved food dyes. More specifically, the method involves measuring the fluorescence emitted by the monoazo food dyes. These dyes are essentially non-fluorescent in low viscosity fluids but are fluorescent in viscous foods. Thus, the fluorescence (either the measured emission intensity or the measured lifetime) can be used as a viscosity indicator. Calibration curves correlating solution viscosity and fluorescence intensity and lifetime can be obtained in solutions such as pure glycerol, glycerol/water, or other aqueous solutions of hydrocolloids. Examples of monoazo dyes studied include Sunset Yellow, Allura Red, and Tartrazine, all of which can be found in a large variety of food products, including beverages, soft foods, and sweets. Experimental results showed that the fluorescence intensity of solutions decreased when viscosity decreased. The method can be applied to monitor food products and thus ensure quality during manufacture, processing, transport, storage, and sale. This quality control can be performed using small hand-held luminescence spectrometers, which are inexpensive.

 
TagsFood Products; Manufacturing; Quality Control.
 
Posted DateJun 14, 2012 9:12 AM

Researcher

Name
Richard Ludescher
Andrew Draganski
Jennifer Komaiko

Manager

Name
Leon Segal

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