Abstract The composition of juice and essential oil of Citrus limetta Risso was investigated. Multidimensional and enantio-gas chromatography were used for the elucidation of the volatile profile and the assessment… Click to show full abstract
Abstract The composition of juice and essential oil of Citrus limetta Risso was investigated. Multidimensional and enantio-gas chromatography were used for the elucidation of the volatile profile and the assessment of enantiomeric distribution. Predominant compounds were linalyl acetate (13.06 g/100 g), β-pinene (6.79 g/100 g), myrcene (1.40 g/100 g) and sabinene (1.05 g/100 g). Through a β-cyclodextrin column eight chiral pairs were separated, equally distributed between laevorotatory and dextrorotatory enantiomers. Liquid chromatography with triple quadrupole ESI-MS and PDA detection showed the presence of flavonoids and phenolic compounds (791.34 ± 36.83 and 32.97 ± 1.92 mg L−1, respectively) in the juice. Sugars (i.e. glucose 202.23 ± 26.81 and fructose 146.73 ± 3.17 mM, respectively), aminoacids (i.e. proline 29.40 ± 3.78 and GABA 8.90 ± 0.95 mM) and organic acids (i.e. citrate 4.68 ± 0.81 mM) were determined in juice by means of 1H NMR spectroscopy.
               
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