| Title: | Characterization of Odorants Causing Smoky Off-Flavors in Cocoa |
| Author(s): | Fullemann D; Steinhaus M; |
| Address: | "Leibniz-Institute for Food Systems Biology at the Technical University of Munich (Leibniz-LSB@TUM), Lise-Meitner-Strasse 34, 85354 Freising, Germany" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "Application of an aroma extract dilution analysis in parallel applied to the volatiles isolated from a sample of fermented cocoa with a pronounced smoky off-flavor and a reference sample with flawless aroma revealed seven potential off-flavor compounds with smoky/phenolic odor qualities and higher flavor dilution factors in the off-flavor sample than in the reference sample. These compounds were 2-methoxyphenol, 3- and 4-methylphenol, 3- and 4-ethylphenol, and 3- and 4-propylphenol. Their quantitation in seven off-flavor samples and two reference samples without off-flavor showed that 4-propylphenol did not exceed its odor threshold value. From the concentrations obtained for the other six compounds and their odor threshold values in deodorized cocoa butter, maximum tolerable concentrations were derived for the incoming goods inspection in the chocolate industry. The suggested limits are 2 mug/kg for 3-ethylphenol and 3-propylphenol, 20 mug/kg for 4-methylphenol, 3-methylphenol, and 4-ethylphenol, and 70 mug/kg for 2-methoxyphenol" |
| Keywords: | Adult Cacao/*chemistry Female Flavoring Agents/*chemistry Gas Chromatography-Mass Spectrometry Humans Male Middle Aged Odorants/*analysis Seeds/chemistry Taste Volatile Organic Compounds/chemistry 2-methoxyphenol 3-ethylphenol 3-propylphenol 4-methylpheno; |
| Notes: | "MedlineFullemann, Daniela Steinhaus, Martin eng 2020/09/10 J Agric Food Chem. 2020 Sep 30; 68(39):10833-10841. doi: 10.1021/acs.jafc.0c04633. Epub 2020 Sep 21" |
