ABSTRACT
Essential oils are complex substances that are usually obtained by steam-distillation or hydrodistillation of plant material. Essential oils are produced in many parts and countries of the world and are very important trade commodities. Aromatherapy has been defined as the therapeutic application of essential oils and aromatic plant extracts in a holistic context, to maintain or improve physical, emotional and mental well-being (1) or briefly the therapeutic use of essential oils (2). The oils are usually applied to the skin, but can also be given orally, by inhalation, by distribution through the air or by other means. The use of essential oils applied to the skin, either in undiluted form or in products containing considerable quantities of essential oils, appears to be increasing. Many dermatologists test a series of essential oil test substances, often combined with single fragrance chemicals, in a ‘fragrance series’. All essential oil samples have been analyzed by the same methods and routine.
