คำศัพท์เฉพThe essential oil secreted by glandular trichomes is mainly
located in leaves. Essential oil can be isolated using a number of
isolation methods, e.g. hydrodistillation, steam distillation and
organic solvent extraction. Nevertheless, monoterpenes are well
known to be vulnerable to chemical changes under steam distillation
conditions, and even conventional solvent extraction is likely
to involve losses of more volatile compounds during removal of
the solvent (Presti et al., 2005). Many of these methods are moreoverาะทางเคมี