title: Not-from-concentrate pilot plant 'Wonderful' cultivar pomegranate juice changes: Volatiles.
abstract: Pilot plant ultrafiltration was used to mimic the dominant U.S. commercial pomegranate juice extraction method (hydraulic pressing whole fruit), to deliver a not-from-concentrate (NFC) juice that was high-temperature short-time pasteurized and stored at 4 and 25°C. Recovered were 46 compounds, of which 38 were routinely isolated and subjected to analysis of variance to assess these NFC juices. Herein, 18 of the 21 consensus pomegranate compounds were recovered. Ultrafiltration resulted in significant decreases for many compounds. Conversely, pasteurization resulted in compound increases. Highly significant decreases in 12 consensus compounds were observed during storage. Principal component analysis demonstrated clearly which compounds were tightly associated, and how storage samples behaved very similarly, independent of temperature. Based on these data and previous work we reported, this solid-phase microextraction (SPME) method delivered a robust 'Wonderful' volatile profile in NFC juices that is likely superior qualitatively and perhaps quantitatively to typical commercial offerings.
authors.affiliation: Food Processing & Sensory Quality, United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA. Electronic address: John.Beaulieu@ars.usda.gov.
authors.forename: John C
authors.initials: JC
authors.lastname: Beaulieu
authors.affiliation: Technology Institute of Costa Rica (ITCR), San Carlos Headquarter, P.O. Box 223-21001, Alajuela, San Carlos, Ciudad Quesada, Costa Rica. Electronic address: jaobando@itcr.ac.cr.
authors.forename: Javier M
authors.initials: JM
authors.lastname: Obando-Ulloa
mesh_terms: D005638:Fruit / Q000737:chemistry*; D029561:Lythraceae / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D055549:Volatile Organic Compounds
keywords: (E)-3-hexenol; 1,4-Cineole; 1-Hexanol; 2-Methyl-3-buten-2-ol; 4-Terpineo; Aroma; Flavor; Gas chromatography; Mass spectrometry; Pasteurization; Punica granatum; Solid phase microextraction; limonene; p-Cymene; α-Terpinene; α-Terpineol