Abstract
This study analyzed temporal variation of the composition of volatile organic compounds (VOCs) at different diffusion time of gaseous phase of aroma compounds of four essential oils, lavender, tea tree, eucalyptus, and melissa. GC/MS methodology with the trace gas sampling by a thermal desorption tube is used to quantitatively determine the concentration of the corresponding 14 kinds of major and original VOCs in four essential oils. This study revealed for the first time that the concentration level of gaseous phase composition is varied, with a diffusion time from that of the liquid phase at equilibrium with it and the VOCs in the essential oils are classified into two groups, depending on whether their concentration with the time. It is verified that the total concentration of VOCs of these essential oils in the room air diffused by the ultrasonic diffuser is as low as 0.6 ppb and decreased soon below 0.1 ppb.
Highlights
Introduction of Aroma Essential Oils andTheirAromatherapy is a very popular complementary therapy and is widely used in many health care settings and services
gas chromatography mass spectroscopy (GC/MS) Results of Essential Oils Diffused into Office Room
GC/MS odor analysis was performed to clarify the concentration of the ingredients of essential oils in room air and their behavior over diffusion time using the common ultrasonic diffuser
Summary
Introduction of Aroma Essential Oils andTheirAromatherapy is a very popular complementary therapy and is widely used in many health care settings and services. Some of the people believe that their routine healthcare on aromatherapy is low cost for preventing to take medical care for illness. There are very few medical or scientific publications on aromatherapy [6], and there is no guidance available about the introduction and use of aromatherapy in routine healthcare. There are many reports and demonstrations on the effect of the aroma ingredient by clinical studies [7]. For the diffusion of aroma and the concentration of its composition in room air, no quantitative analysis has been reported up to date, and monitoring technology of the volatile organic compounds (VOCs) in aroma essential oil is not yet developed. The difficulties are that the effects of aromatherapy under investigation are not easy to measure, and their concentration in room air seems likely to be very low
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