title: GC-FID/MS Profiling of Supercritical CO2 Extracts of Peels from Citrus aurantium, C. sinensis cv. Washington navel, C. sinensis cv. Tarocco and C. sinensis cv. Doppio Sanguigno from Dubrovnik Area (Croatia).
abstract: The peels of Citrus aurantium L. and Citrus sinensis Osbeck cultivars from the Dubrovnik region (south Croatia) were extracted by supercritical CO2 at 40 degrees C and 10 MPa at 1.76 kg/h to obtain enriched extracts in comparison with simple pressing of the peels. The extracts were analyzed in detail by gas chromatography and mass spectrometry (GC-FID/MS). Relevant similarities among the peel oil compositions of C. aurantium and C. sinensis cultivars were found with limonene predominance (up to 54.3%). The principal oxygenated monoterpenes were linalool (3.0%-5.9%), α-terpineol (0.7%-2.4%), linalyl acetate (0.0%-5.0%), geranyl acetate (0.0%-0.4%), (Z)-citral (0.0%-1.8%) and (E)-citral (0.0%-1.9%). Several sesquiterpenes were found with minor percentages. Coumarin derivatives were identified in all the samples among the relevant compounds. Isogeijerin dominated in the peels of C. sinensis cv. Tarocco (15.3%) and C. aurantium (11.2%). Scoparone ranged from 0.1% to 0.5% in all the samples. Bergapten (up to 1.4%), osthole (up to 1.1%) and 7-methoxy-8-(2-formylpropyl)coumarin (up to 1.1%) were found mostly in C. sinensis cv. Doppio Sanguigno. It was possible to indicate a few other differences among the extracts such as higher percentage of linalool, linalyl and geranyl acetates, as well as the abundance of sabinene and isogeijerin in C. aurantium or the occurrence of β-sinensal in C. sinensis cultivars.
authors.forename: Igor
authors.initials: I
authors.lastname: Jerković
authors.forename: Jasmina
authors.initials: J
authors.lastname: Drulžić
authors.forename: Zvonimir
authors.initials: Z
authors.lastname: Marijanović
authors.forename: Mirko
authors.initials: M
authors.lastname: Gugić
authors.forename: Stela
authors.initials: S
authors.lastname: Jokić
authors.forename: Marin
authors.initials: M
authors.lastname: Roje
mesh_terms: D002245:Carbon Dioxide; D032084:Citrus sinensis / Q000737:chemistry*; D017523:Croatia; D005638:Fruit / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D010936:Plant Extracts / Q000737:chemistry
chemical_list: D010936:Plant Extracts; D002245:Carbon Dioxide