Document Detail


An electronic tongue for gliadins semi-quantitative detection in foodstuffs.
MedLine Citation:
PMID:  21147329     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
An all-solid-state potentiometric electronic tongue with 36 polymeric membranes has been used for the first time to detect gliadins, which are primarily responsible for gluten intolerance in people suffering from celiac disease. A linear discriminant model, based on the signals of 11 polymeric membranes, selected from the 36 above using a stepwise procedure, was used to semi-quantitatively classify samples of a "Gluten-free" foodstuff (baby milked flour), previously contaminated with known amounts of gliadins (<10, 20-50 or >50mg/kg), as "Gluten-free", "Low-Gluten content" or "Gluten-containing". For this food matrix, the device had sensitivity towards gliadins of 1-2mg/kg and overall sensitivity and specificity of 77% and 78%, respectively. Moreover, the device never identified an ethanolic extract containing gliadins as "Gluten-free". Finally, the system also allowed distinguishing "Gluten-free" and "Gluten-containing" foodstuffs (15 foods, including breads, flours, baby milked flours, cookies and breakfast cereals) with an overall sensitivity and specificity greater than 83%, using the signals of only 4 selected polymeric membranes (selected using a stepwise procedure). Since only one "Gluten-containing" foodstuff was misclassified as "Gluten-free", the device could be used as a preliminary tool for quality control of foods for celiac patients.
Authors:
António M Peres; Luís G Dias; Ana C A Veloso; Sofia G Meirinho; Jorge Sá Morais; Adélio A S C Machado
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Publication Detail:
Type:  Journal Article     Date:  2010-11-02
Journal Detail:
Title:  Talanta     Volume:  83     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  857-64     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
LSRE - Laboratory of Separation and Reaction Engineering, Escola Superior Agrária, Instituto Politécnico de Bragança, Bragança, Portugal; CIMO - Mountain Research Centre, Escola Superior Agrária, Instituto Politécnico de Bragança, Bragança, Portugal.
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