title: Isotopic and elemental characterisation of Slovenian apple juice according to geographical origin: Preliminary results.
abstract: This study examined the applicability of stable isotope and multi-element data for determining the geographical origin of fresh apple juices. Samples included three apple cultivars (Idared, Golden Delicious and Topaz) harvested in 2011 and 2012 from five different geographical regions of Slovenia. Regional discrimination of the juice samples was most successful when using linear discriminant analysis (LDA) and taking into account the following parameters: δ(2)H and δ(18)O content of juice water; δ(15)N and δ(13)C content of the pulp, (D/H)I and (D/H)II in ethanol and the concentration of S, Cl, Fe, Cu, Zn and Sr. Overall prediction ability was 83.9%. The factors that best distinguished the different types of cultivar were the δ(2)H and δ(18)O content of fruit juice water; the δ(13)C and (D/H)I content of ethanol; and the concentration of S, Mg, K, Cu, and Ti. Prediction ability, taking into account all ten parameters, was 75.8%.
authors.affiliation: Fructal d.d., Tovarniška cesta 7, SI-5270 Ajdovščina, Slovenia.
authors.forename: Karmen
authors.initials: K
authors.lastname: Bizjak Bat
authors.affiliation: Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
authors.forename: Klemen
authors.initials: K
authors.lastname: Eler
authors.affiliation: Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
authors.forename: Darja
authors.initials: D
authors.lastname: Mazej
authors.affiliation: Wine Research Centre, University of Nova Gorica, Vipavska 11c, SI-5270 Ajdovščina, Slovenia.
authors.forename: Branka
authors.initials: B
authors.lastname: Mozetič Vodopivec
authors.affiliation: Fructal d.d., Tovarniška cesta 7, SI-5270 Ajdovščina, Slovenia.
authors.forename: Ines
authors.initials: I
authors.lastname: Mulič
authors.affiliation: Department of Low and Intermediate Energy Physics, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
authors.forename: Peter
authors.initials: P
authors.lastname: Kump
authors.affiliation: Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia. Electronic address: nives.ogrinc@ijs.si.
authors.forename: Nives
authors.initials: N
authors.lastname: Ogrinc
mesh_terms: D000531:Altitude; D002241:Carbohydrates / Q000032:analysis; D002980:Climate; D016002:Discriminant Analysis; D000431:Ethanol / Q000032:analysis; D000067030:Fruit and Vegetable Juices / Q000032:analysis*; D007554:Isotopes / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D027845:Malus / Q000737:chemistry* / Q000254:growth & development; D013058:Mass Spectrometry; D019083:Mediterranean Region; D008903:Minerals / Q000032:analysis*; D017524:Slovenia
chemical_list: D002241:Carbohydrates; D007554:Isotopes; D008903:Minerals; D000431:Ethanol
keywords: Apple juice; Elemental content; Geographical origin; Slovenia; Stable isotopes