title: Determination of volatile, phenolic, organic acid and sugar components in a Turkish cv. Dortyol (Citrus sinensis L. Osbeck) orange juice.
abstract: BACKGROUND
  Orange flavour is the results of a natural combination of volatile compounds in a well-balanced system including sugars, acids and phenolic compounds. This paper reports the results of the first determination of aroma, organic acids, sugars, and phenolic components in Dortyol yerli orange juices.
  
  
  RESULTS
  A total of 58 volatile components, including esters (nine), terpenes (19), terpenols (13), aldehydes (two), ketones (three), alcohols (four) and acids (eight) were identified and quantified in Dortyol yerli orange juice by GC-FID and GC-MS. Organic acids, sugars and phenolic compositions were also determined by HPLC methods. The major organic acid and sugar found were citric acid and sucrose, respectively. With regard to phenolics, 14 compounds were identified and quantified in the orange juice.
  
  
  CONCLUSIONS
  Terpenes and terpenols were found as the main types of volatile components in Dortyol yerli orange juice. In terms of aroma contribution to orange juice, 12 compounds were prominent based on the odour activity values (OAVs). The highest OAV values were recorded for ethyl butanoate, nootkatone, linalool and DL-limonene. When we compare the obtained results of cv. Dortyol orange juice with the other orange juice varieties, the composition of Dortyol orange juice was similar to Valencia and Navel orange juices.
authors.affiliation: University of Adiyaman, Adiyaman Vocational School, Department of Food Technology, 02040 Adiyaman, Turkey.
authors.forename: Hasim
authors.initials: H
authors.lastname: Kelebek
authors.forename: Serkan
authors.initials: S
authors.lastname: Selli
mesh_terms: D000143:Acids / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D019343:Citric Acid / Q000032:analysis; D032084:Citrus sinensis / Q000737:chemistry*; D019422:Dietary Sucrose / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D009812:Odorants / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000143:Acids; D019422:Dietary Sucrose; D010636:Phenols; D055549:Volatile Organic Compounds; D019343:Citric Acid