In this study,the volatile aroma compounds in 4 sweet orange oils were studied using gas chromatography-mass spectrometry(GC-MS).The characteristic aroma compounds in sweet orange oils were analyzed by gas chromatography-olfactometry(GC-O).The results showed that the characteristic aroma compounds in sweet orange oils were identified,including monoterpenes,sesquiterpenes,aldehydes,alcohols and ketones.Volatiles of 4 sweet orange oils were characterized by descriptive sensory analysis and principal component...