基于飞行时间质谱原位检测的5种绿化植物异戊二烯释放速率
投稿时间:2018-12-15    点此下载全文
引用本文:熊峰,吕俊瑶,周丕生,殷杉.基于飞行时间质谱原位检测的5种绿化植物异戊二烯释放速率[J].《上海交通大学学报》(农业科学版),2019,(4):89-94
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作者单位E-mail
熊峰 上海交通大学 农业与生物学院,上海 200240 xfsgsb@sjtu.edu.cn 
吕俊瑶 上海交通大学 农业与生物学院,上海 200240  
周丕生 上海交通大学 农业与生物学院,上海 200240  
殷杉 上海交通大学 农业与生物学院,上海 200240  
基金项目:国家重点研发计划(2016YFC0200104);国家自然科学基金(71333010和31770746)
中文摘要:异戊二烯是一种重要的植物挥发性有机物(biogenic volatile organic compounds,BVOCs),约占全球BVOCs释放总量的44%,被认为是臭氧和二次气溶胶的重要来源。封闭式采样-热脱附-气质联用(GC-MS)是目前广泛使用的异戊二烯检测方法,但存在分析周期长、步骤复杂、时间分辨率低、易产生系统误差等问题,影响测试结果的准确性和时效性。本研究通过封闭式采样法收集样品,并引入飞行时间质谱仪(TOF-MS)进行原位分析,建立了一种植物源异戊二烯的原位检测方法,并利用该方法测量了5种园林绿化植物异戊二烯的排放速率。结果表明,垂柳的异戊二烯排放速率最高,在夏季可达到14.94 μg/g/h,而香樟、女贞、珊瑚树排放速率都较低;植物释放异戊二烯的速率在不同季度间也存在差异,夏季释放速率高于其他季节,冬季释放速率最低。根据该方法与传统方法比较,2种测试结果没有显著差异。新方法可用于植物BVOCs排放的快速准确检测。
中文关键词:植物挥发性有机物  异戊二烯  飞行时间质谱仪  释放速率
 
Isoprene emission rate of five plant species based on in-situ time-of-flight mass spectrometry
Abstract:Isoprene emitted by plants is a kind of biogenic volatile organic compounds(BVOCs),which is considered as an important source of ozone and secondary aerosols,accounting for about 44% of the total release of BVOCs in the world.Enclosed sampling-thermal desorption-GC-MS analysis is the most widely used isoprene detection method.However,its long analysis period,complex steps,low time resolution which could generate systematic errors,affect the effectiveness and accuracy of results.In this study,a method for in-situ detection of plant-derived isoprene was established through enclosed sampling method and in-situ analysis by Time-Of-Flight Mass Spectrometer(TOF-MS).The emission rate of isoprene from 5 typical plants in Shanghai was measured by this method.The isoprene emission rate of Salix babylonica is the highest(14.94 μg/g/h in summer),while the rates of Cinnamomum camphora,Viburnum odoratissinum,Ligustrum lucidum are low.The isoprene rates vary in different seasons.The isoprene emission rate is higher in summer,while the rate is the lowest in winter.This study provides an accurate,convenient and feasible method for the rapid detection of plant BVOCs emission.
keywords:BVOCs  isoprene  TOF-MS  emission rate
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