| Title: | Corky off-flavor compounds in cork planks at different storage times before processing. Influence on the quality of the final stoppers |
| Author(s): | Alanon ME; Alarcon M; Diaz-Maroto IJ; Perez-Coello MS; Diaz-Maroto MC; |
| Address: | "Food Technology, Higher Technical School of Agronomic Engineering, University of Castilla-La Mancha, Ciudad Real, Spain. Food Technology, Faculty of Chemical Sciences and Technologies, Regional Institute for Applied Scientific Research (IRICA), University of Castilla-La Mancha, Ciudad Real, Spain. Departamento de Ingenieria Agroforestal, Escuela Politecnica Superior, Campus Universitario s/n, Universidad de Santiago de Compostela, Lugo, Spain" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Cork companies store cork planks before processing them for a minimum of 6 months to dry up and to stabilize their texture and chemical composition, although many companies extend this storage period up to 12 months. However, there is no information about the influence of this seasoning period on their 'corky' off flavors. For this reason, the main compounds responsible for the 'cork taint' of planks stored before processing from 6 to 12 months were investigated. RESULTS: Four haloanisoles and three halophenols were identified: 2,4,6-trichloroanisole (TCA), 2,3,4,6-tetrachloroanisole (TeCA), pentachloroanisole (PCA), 2,4,6-tribromoanisole (TBA), 2,4,6-trichlorophenol (TCP), 2,3,4,6-tetrachlorophenol (TeCP), and 2,4,6-tribromophenol (TBP). All of the planks presented some haloanisole or halophenol after 6 and 9 months of storage, which practically disappeared after a year of storage. These compounds were only detected in the cork stoppers made from planks with 6 and 9 months of storage. Of the alkylmethoxypyrazines, 2-methoxy-3,5-dimethylpyrazine (MDMP), 3-isopropyl-2-methoxypyrazine (IPMP), and 3-isobutyl-2-methoxypyrazine (IBMP) were identified. The MDMP was detected in a larger number of planks with 6 months of storage and at higher concentrations than IPMP and IBMP. However, MDMP was not detected in the cork stoppers made from planks at 6, 9, and 12 months of storage. CONCLUSION: A storage time of 6 months before processing of raw cork planks would be sufficient to obtain cork stoppers with low concentrations of corky off-flavor compounds. An increase in storage up to 9 or 12 months would result in practically 'cork taint'-free natural stoppers. (c) 2021 Society of Chemical Industry" |
| Keywords: | Food Handling/instrumentation Plant Bark/*chemistry Quercus/*chemistry Time Factors Volatile Organic Compounds/*chemistry Wood/chemistry alkylmethoxypyrazines cork planks haloanisoles halophenols storage; |
| Notes: | "MedlineAlanon, M Elena Alarcon, Marina Diaz-Maroto, Ignacio J Perez-Coello, M Soledad Diaz-Maroto, M Consuelo eng SBPLY-17-180501-000445/Junta de Comunidades de Castilla-La Mancha/ England 2021/01/26 J Sci Food Agric. 2021 Aug 30; 101(11):4735-4742. doi: 10.1002/jsfa.11119. Epub 2021 Feb 11" |
