Chemical composition of the essential oils of Citrus sinensis cv. valencia and a quantitative structure-retention relationship study for the prediction of retention indices by multiple linear regression

Abstract

The chemical composition of the volatile fraction obtained by head-space solid phase microextraction (HS-SPME), single drop microextraction (SDME) and the essential oil obtained by cold-press from the peels of C. sinensis cv. valencia were analyzed employing gas chromatography-flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS). The main components were limonene (61.34 %, 68.27 %, 90.50 %), myrcene (17.55 %, 12.35 %, 2.50 %), sabinene (6.50 %, 7.62 %, 0.5 %) and α-pinene (0 %, 6.65 %, 1.4 %) respectively obtained by HS-SPME, SDME and cold-press. Then a quantitative structure-retention relationship (QSRR) study for the prediction of retention indices (RI) of the compounds was developed by application of structural descriptors and the multiple linear regression (MLR) method. Principal components analysis was used to select the training set. A simple model with low standard errors and high correlation coefficients was obtained. The results illustrated that linear techniques such as MLR combined with a successful variable selection procedure are capable of generating an efficient QSRR model for prediction of the retention indices of different compounds. This model, with high statistical significance (R2 train = 0.983, R2 test = 0.970, Q2 LOO = 0.962, Q2 LGO = 0.936, REP(%) = 3.00), could be used adequately for the prediction and description of the retention indices of the volatile compounds

Eucalyptus camaldulensis, Citrus aurantium, and Citrus sinensis Essential Oils as Antifungal Activity against Aspergillus flavus, Aspergillus niger, Aspergillus terreus, and Fusarium culmorum

“…Other study showed that the C. sinensis peel EO had limonene, β-myrcene, decanal, β-pinene, and linalool, as major compounds with good antioxidant activity [70]. Limonene in the present study reached 73.4% in C. sinensis, while in previous investigation it was 77.49% the peel oil of sweet orange followed by myrcene 6.27% [71,72]. Limonene (80.9%) and β-myrcene (4.19%) were the main constituents in fresh peel EO of C. sinensis [73].…”

Optimization of essential oil extraction from orange peels using steam explosion

“…In a previous reports ( Azar et al., 2011 ; Tao et al., 2009 ), limonene was observed as the main constituent (77.49 %) in the peel oil of sweet orange, followed by myrcene (6.27 %), α-farnesene (3.64 %) and γ-terpinene (3.34 %). The main compounds in C. sinensis from Uganda and Rwanda were limonene (87.9 and 92.5 %), myrcene (2.4 and 2.0 %), α-pinene (0.5 and 2.4 %) and linalool (1.2 and 0.9 %) ( Njoroge et al., 2009 ).…”

Chemical composition, antioxidant activity and antimicrobial activity of essential oil from Citrus aurantium L zest against some pathogenic microorganisms

“…In previous reports [16,17], limonene was observed as the main constituent (77.49%) in the zest essential oil of sweet orange, followed by myrcene (6.27%), α-farnesene (3.64%), and γ-terpinene (3.34%). The main compounds in zest essential oil from Uganda and Rwanda were limonene (87.9 and 92.5%), myrcene (2.4 and 2.0%), α-pinene (0.5 and 2.4%), and linalool (1.2 and 0.9%) [18].…”