title: Determination of Key Flavor Components in Methylene Chloride Extracts from Processed Grapefruit Juice.
abstract: The relative correlation of 52 aroma and 5 taste components in commercial not-from-concentrate grapefruit juices with flavor panel preference was determined. Methylene chloride extracts of juice were analyzed using GC/MS with a DB-5 column. Nonvolatiles determined included limonin and naringin by HPLC, degrees Brix, total acids, and degrees Brix/acid ratio. Juice samples were classified into low, medium, or high categories, based on average taste panel preference scores (nine-point hedonic scale). Principal component analysis demonstrated that highest quality juices were tightly clustered. Discriminant analysis indicated that 82% of the samples could be identified in the correct preference category using only myrcene, beta-caryophyllene, linalool, nootkatone, and degrees Brix. Nootkatone alone was not strongly associated with preference scores. The most preferred juices were strongly associated with low myrcene, low linalool, and intermediate levels of beta-caryophyllene.
authors.affiliation: Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, Florida 33850, and Citrus Research and Education Center, Florida Department of Citrus, 700 Experiment Station Road, Lake Alfred, Florida 33850.
authors.initials: P
authors.lastname: Jella
authors.initials: R
authors.lastname: Rouseff
authors.initials: K
authors.lastname: Goodner
authors.initials: W
authors.lastname: Widmer