Emissions of volatile organic compounds from heated needles and twigs of Pinus pumila

查看全文 作　　者：ZHAO Feng-jun SHU Li-fu WANG Qiu-hua WANG Ming-yu TIAN Xiao-ruiInstitute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry;Forest Protection Laboratory of State Forestry Administration,Beijing 100091,P.R.China.

出　　处：《Journal of Forestry Research》索引2011年第22卷第2期,共6页

基　　金：supported by National Natural Science Foundation of China (30872037, 31070587);Open Project Program of State Key Laboratory of Fire Science, University of Science and Technology of China (HZ2008-KF08) 摘　　要：A study was conducted to explore the mechanism that emissions of volatile organic compounds(VOC) from heated needles and twigs(200°C,within 15 min) of Pinus pumila affect fire behaviours using the technology of Thermal Desorption-Gas Chromatography-Mass Spectrometry(TD-GC-MS).The results indicated that the main components of VOC from heated needles and twigs are terpenoids.Most of these terpenoids are monoterpenes.Terpenoids account for 72.93% for the needles and 92.40% for the twigs of the total VOC,and their emission ratios are 61.200 μg·g-1 and 217.060 μg·g-1 respectively.Heated twigs can emit more terpenoids than heated needles because twigs had more volatile oils than needles.In actual fires,these large amounts of terpenoid emissions,especially the monoterpene emissions,have strong effects on fire behaviors that are not only in the initial stage but also in the fast propagation stage of fires.These flammable gases are capable of causing violent combustion and creating crown fires.In addition,if these gases accumulate in an uneven geographical area,there will be a possible for eruptive fires and/or fires flashover to occur. 关键词：总挥发性有机化合物排放量树枝针头单萜类化合物偃松气相色谱质谱技术

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Emissions of volatile organic compounds from heated needles and twigs of Pinus pumila

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