Development of Incurred Reference Material for Improving Conditions of Gluten Quantification

Author： Bugyi Zsuzsanna Török Kitti Hajas Lívia Adonyi Zsanett Poms Roland E. Popping Bert Diaz-Amigo Carmen Kerbach Sandra TömösKöZi Sándor

Publisher： AOAC International

ISSN： 1944-7922

Source： Journal of AOAC International, Vol.95, Iss.2, 2012-04, pp. : 382-387

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Abstract

Celiac disease and wheat allergy are the most common adverse reactions triggered by cereal proteins, mainly gluten, which is one of the 14 allergenic food ingredients that must be labeled on food products in the European Union (EU). To meet the requirements of this regulation, reliable analytical methodology for proper quantification of gluten is necessary. However, validation of presently used methods (ELISA and lateral flow device) is limited partly due to the lack of reference methods and incurred reference materials. To solve this problem, the goal of our work was to develop an incurred reference material for the quantification of gluten under the auspices of EU-FP6 funded Network of Excellence MoniQA. During this work, we produced a processed model product (cookie) containing gliadin (major allergenic fraction of gluten) in a defined amount. This paper addresses the development process of this material together with the associated problems (insufficient homogeneity and low recovery) and their solutions. As a result, an incurred food matrix was produced on a laboratory-scale with a potential use as a reference material. The model product was tested by an ELISA method followed by a comparative study of commercially available ELISA kits to investigate the applicability of the product. Preliminary results of this study are also presented.