title: Origin authentication of distillers' dried grains and solubles (DDGS)--application and comparison of different analytical strategies.
abstract: In the context of products from certain regions or countries being banned because of an identified or non-identified hazard, proof of geographical origin is essential with regard to feed and food safety issues. Usually, the product labeling of an affected feed lot shows origin, and the paper documentation shows traceability. Incorrect product labeling is common in embargo situations, however, and alternative analytical strategies for controlling feed authenticity are therefore needed. In this study, distillers' dried grains and solubles (DDGS) were chosen as the product on which to base a comparison of analytical strategies aimed at identifying the most appropriate one. Various analytical techniques were investigated for their ability to authenticate DDGS, including spectroscopic and spectrometric techniques combined with multivariate data analysis, as well as proven techniques for authenticating food, such as DNA analysis and stable isotope ratio analysis. An external validation procedure (called the system challenge) was used to analyze sample sets blind and to compare analytical techniques. All the techniques were adapted so as to be applicable to the DDGS matrix. They produced positive results in determining the botanical origin of DDGS (corn vs. wheat), and several of them were able to determine the geographical origin of the DDGS in the sample set. The maintenance and extension of the databanks generated in this study through the analysis of new authentic samples from a single location are essential in order to monitor developments and processing that could affect authentication.
authors.affiliation: Valorisation of Agricultural Products Department, Walloon Agricultural Research Centre (CRA-W), Henseval Building, Chaussée de Namur 24, 5030, Gembloux, Belgium, p.vermeulen@cra.wallonie.be.
authors.forename: Philippe
authors.initials: P
authors.lastname: Vermeulen
authors.forename: Thorben
authors.initials: T
authors.lastname: Nietner
authors.forename: Simon A
authors.initials: SA
authors.lastname: Haughey
authors.forename: Zengling
authors.initials: Z
authors.lastname: Yang
authors.forename: Noelia
authors.initials: N
authors.lastname: Tena
authors.forename: Hana
authors.initials: H
authors.lastname: Chmelarova
authors.forename: Saskia
authors.initials: S
authors.lastname: van Ruth
authors.forename: Monika
authors.initials: M
authors.lastname: Tomaniova
authors.forename: Ana
authors.initials: A
authors.lastname: Boix
authors.forename: Lujia
authors.initials: L
authors.lastname: Han
authors.forename: Christopher T
authors.initials: CT
authors.lastname: Elliott
authors.forename: Vincent
authors.initials: V
authors.lastname: Baeten
authors.forename: Carsten
authors.initials: C
authors.lastname: Fauhl-Hassek
mesh_terms: D002523:Edible Grain / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry*; D012995:Solubility
chemical_list: D000431:Ethanol