Using GC/MS and GC/FTIR, the chemical composition of the headspace of lovage root has been examined. It was found to contain 20 compounds of which β-phellandrene (16.47%), citronellal (12.84%) and ligustilide (20.91%) were found to be the major components. The chemical composition of a series of essential oils produced from concretes made from a range of solvents of differing polarities were also examined. The compositions of the oils, in which 28 compounds were characterized, were compared to each other and to an oil produced by hydrodistillation. The main compound characterized in each of the oils was ligustilide. It was found that the oil produced by first extraction with 1,1,2-trichloro-1,2,2-trifiuoro-ethane (CFC-113) prior to steam distillation had the best yield and possessed the most desired aroma.
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Cu et al. (1990) studied this question.
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