ABSTRACT: The flavor characteristics of pennywort juices with added sugar treated by ultra-high pressure, pasteurization,
and sterilization were investigated using solid phase microextraction combined with gas chromatographymass
spectrometry. It was found that sesquiterpene hydrocarbons comprised the major class of volatile components
present and the juices had a characteristic aroma due to the presence of volatiles including β-caryophyllene
and humulene and α-copaene. In comparison with heated juices, HPP-treated samples could retain more volatile
compounds such as linalool and geraniol similar to those present in fresh juice, whereas some volatiles such as α-
terpinene and ketone class were apparently formed by thermal treatment.