Characterization of volatile compounds from healthy and citrus black spot-infected Valencia orange juice and essential oil by using gas chromatography-mass spectrometry.

From the healthy group to groups with different levels of CBS severity, only the concentration of linalool compound in orange juice showed an increasing trend.

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However, the concentrations of most aldehydes and ketones showed a decreasing trend in the symptomatic groups, which was consistent with a previous study ( da Cruz et al., 2023 ). 3.2 Identification and quantification of VOCs in both healthy and CBS orange essential oil As shown in Table 1 , a total of 21 volatiles were extracted by SPME and identified by GC–MS from all orange essential oils, namely, 11 terpenes, five aldehydes, two alcohols, two esters, and one other class.

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