![]() The yields of iso-menthone, 3-octanol, and l-menthyl acetate increased as temperature was increased up to 220 ☌. ![]() The yields of l-menthol, l-limonene, l-menthone, and piperitone increased as the temperature was increased from 100 ☌ to 180 ☌, but decreased as it was raised further to 220 ☌. The yields of both l-menthol and l-menthone converged in the initial fractions as the extraction temperature was increased. Quantitative analysis of volatile component was conducted by gas chromatography. The extraction and fractionation were carried out between 100 ☌ and 220 ☌, and extraction times of 5 to 60 min were investigated. ![]() Subcritical water treatment with pressure-releasing distillation was proposed as a method to obtain essential oil from Japanese mint ( Mentha arvensis L.
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