在室內種花草可以吸收空氣中對健康不利的有機化合物,，但美國的一項最新研究顯示,，有些室內植物會釋放揮發(fā)性有機化合物。這類有機化合物是否對人體有害仍有待進一步研究,。
美國佐治亞大學的研究人員日前報告說,，他們對4種室內植物——白鶴芋、虎尾蘭,、垂葉榕和檳榔樹進行了觀察研究,，發(fā)現(xiàn)這些植物都會釋放揮發(fā)性有機化合物，殺蟲劑,、土壤和制作花盆的塑料是造成植物釋放有機化合物的原因。
研究人員將這4種植物放置在玻璃容器內,，并在容器的進風口安裝了木炭過濾器,，在出風口安裝了測量儀器，這種測量儀器能檢測到植物釋放的揮發(fā)性有機化合物,。
結果發(fā)現(xiàn),，這4種植物都會釋放揮發(fā)性有機化合物，其中白鶴芋放出的最多,，虎尾蘭最少,。此外，這些植物在白天釋放的有機化合物較多,，夜間較少,。
報告指出,，已有實驗顯示，這些植物釋放的有機化合物中的某些成分對動物健康不利,。但研究人員說,，為弄清這些植物釋放的有機化合物是否會對人體造成傷害，他們還需進行更多的研究,。（生物谷Bioon.com）
生物谷推薦原始出處：
HortScience, April 2009; 44: 396 - 400.
Volatile Organic Compounds Emanating from Indoor Ornamental Plants
Dong Sik Yang
Department of Horticultural Science, The University of Georgia, Athens, GA 30602-7273
Ki-Cheol Son
Department of Environmental Science, Konkuk University, Seoul 143-701, Korea
Stanley J. Kays1
Department of Horticulture, The Plant Center, 1111 Plant Sciences Building, The University of Georgia, Athens, GA 30602-7273
A broad cross-section of volatiles emanating from four species of popular indoor ornamental plants (Spathiphyllum wallisii Regel, Sansevieria trifasciata Prain, Ficus benjamina L., and Chrysalidocarpus lutescens Wendl.) was identified and categorized based on source. Volatile organic compounds from individual plants were obtained using a dynamic headspace system and trapped on Tenax TA during the day and again at night. Using short-path thermal desorption and cryofocusing, the volatiles were transferred onto a capillary column and analyzed using gas chromatography–mass spectroscopy. The volatiles originated from the plants, media/micro-organisms, pot, and pesticides. A total of 23, 12, 13, and 16 compounds were identified from S. wallisii, S. trifasciata, F. benjamina, and C. lutescens, respectively. The night emanation rate was substantially reduced (i.e., by 30.1%, 69.5%, 73.7%, and 63.1%, respectively) reflecting in part the regulation of biosynthesis and the greater diffusion resistance when the stomata were closed. S. wallisii had the highest emanation rate, releasing 15 terpenoid compounds [e.g., linaloloxide, linalool, (Z)-β-farnesene, farnesal, (+)--cadinene, (+)-β-costol] into the surrounding air. Alpha-farnesene (90.3%) was quantitatively the dominant volatile present followed by (Z)-β-farnesene (1.4%), (+)-β-costol (1.4%), and farnesal (1.1%). Substantially fewer terpenoids (i.e., two, nine, and eight) emanated from S. trifasciata, F. benjamina, and C. lutescens, which quantitatively emitted fewer volatiles than S. wallisii. Most terpenoids from the four species were sesquiterpenes rather than monoterpenes. Methyl salicylate, a plant-signaling compound, was emitted by all four species. Certain volatiles (e.g., 2-chlorobenzonitrile, 1-ethyl-3,5-dimethylbenzene) were released from growth media and/or micro-organisms therein; other sources included the plastic pot (e.g., 2-ethyl-1-hexanol, octamethyl cyclotetrasiloxane) and pesticide ingredients [e.g., 2-(2-methoxy- ethoxy)ethanol, 2-ethylhexyl salicylate, homosalate].
