Colorimetric sensor array for the detection and identification of natural and artificial sugars

ANYL 266

Kenneth S. Suslick, ksuslick@uiuc.edu, Christopher J. Musto, cmusto2@illinois.edu, and Sung H. Lim, sunglim@uiuc.edu. Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801
The molecular recognition of sugars and a practical method to detect and discriminate among a large number of such similar analytes remains a substantial scientific challenge. We report here a low-cost, simple colorimetric sensor array made up of 16 chemically responsive indicators immobilized in an organically modified polysiloxane (“ormosil”), capable of identification and quantification of sugars and related compounds. Fifteen different monosaccharides, disaccharides and artificial sugars were differentiated without error in 80 trials. A variation of the original array has been developed to detect and identify 14 different natural and artificial sweeteners at millimolar concentrations in addition to detection among complex mixtures such as commonly used “table-top” sweetener packets. Limits of detection at pH 7.4 for glucose were less than 1 mM, which is below physiologically important levels.

 

Global Challenges in Food Analysis
1:30 PM-4:30 PM, Monday, August 17, 2009 Renaissance Washington -- Room 12-14, Oral

Division of Analytical Chemistry

The 238th ACS National Meeting, Washington, DC, August 16-20, 2009