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The effects of evaporating essential oils on indoor air quality [An article from: Atmospheric Environment]
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Essential oils, predominantly comprised of a group of aromatic chemicals, have attracted increasing attention as they are introduced into indoor environments through various forms of consumer products via different venues. Our study aimed to characterize the profiles and concentrations of emitted volatile organic compounds (VOCs) when evaporating essential oils indoors. Three popular essential oils in the market, lavender, eucalyptus, and tea tree, based on a nation-wide questionnaire survey, were tested. Specific aromatic compounds of interest were sampled during evaporating the essential oils, and analyzed by GC-MS. Indoor carbon monoxide (CO), carbon dioxide (CO"2), total volatile organic compounds (TVOCs), and particulate matters (PM"1"0) were measured by real-time, continuous monitors, and duplicate samples for airborne fungi and bacteria were collected in different periods of the evaporation. Indoor CO (average concentration 1.48 vs. 0.47ppm at test vs. background), CO"2 (543.21 vs. 435.47ppm), and TVOCs (0.74 vs. 0.48ppm) levels have increased significantly after evaporating essential oils, but not the PM"1"0 (2.45 vs. 2.42ppm). The anti-microbial activity on airborne microbes, an effect claimed by the use of many essential oils, could only be found at the first 30-60min after the evaporation began as the highest levels of volatile components in these essential oils appeared to emit into the air, especially in the case of tea tree oil. High emissions of linalool (0.092-0.787mgm^-^3), eucalyptol (0.007-0.856mgm^-^3), d-limonene (0.004-0.153mgm^-^3), @r-cymene (0.019-0.141mgm^-^3), and terpinene-4-ol-1 (0.029-0.978mgm^-^3), all from the family of terpenes, were observed, and warranted for further examination for their health implications, especially for their potential contribution to the increasing indoor levels of secondary pollutants such as formaldehyde and secondary organic aerosols (SOAs) in the presence of ozone.
Description:
Essential oils, predominantly comprised of a group of aromatic chemicals, have attracted increasing attention as they are introduced into indoor environments through various forms of consumer products via different venues. Our study aimed to characterize the profiles and concentrations of emitted volatile organic compounds (VOCs) when evaporating essential oils indoors. Three popular essential oils in the market, lavender, eucalyptus, and tea tree, based on a nation-wide questionnaire survey, were tested. Specific aromatic compounds of interest were sampled during evaporating the essential oils, and analyzed by GC-MS. Indoor carbon monoxide (CO), carbon dioxide (CO"2), total volatile organic compounds (TVOCs), and particulate matters (PM"1"0) were measured by real-time, continuous monitors, and duplicate samples for airborne fungi and bacteria were collected in different periods of the evaporation. Indoor CO (average concentration 1.48 vs. 0.47ppm at test vs. background), CO"2 (543.21 vs. 435.47ppm), and TVOCs (0.74 vs. 0.48ppm) levels have increased significantly after evaporating essential oils, but not the PM"1"0 (2.45 vs. 2.42ppm). The anti-microbial activity on airborne microbes, an effect claimed by the use of many essential oils, could only be found at the first 30-60min after the evaporation began as the highest levels of volatile components in these essential oils appeared to emit into the air, especially in the case of tea tree oil. High emissions of linalool (0.092-0.787mgm^-^3), eucalyptol (0.007-0.856mgm^-^3), d-limonene (0.004-0.153mgm^-^3), @r-cymene (0.019-0.141mgm^-^3), and terpinene-4-ol-1 (0.029-0.978mgm^-^3), all from the family of terpenes, were observed, and warranted for further examination for their health implications, especially for their potential contribution to the increasing indoor levels of secondary pollutants such as formaldehyde and secondary organic aerosols (SOAs) in the presence of ozone.
