大气颗粒物中有机硝酸酯的研究进展

发布时间：2018-04-28 08:33

本文选题：有机硝酸酯 + 气溶胶质谱　；参考：《化学进展》2017年09期

【摘要】：有机硝酸酯是大气中挥发性有机物与自由基反应的产物,半挥发性的气相有机硝酸酯可以通过氧化反应或气粒分配作用进入颗粒相,是二次有机物的一个重要组成部分,逐渐引起大气化学研究者的广泛关注。颗粒相有机硝酸酯具有分子种类众多、理化性质复杂的特点,其全组分的测定有较高的难度,故目前开展的研究还较为有限。基于近年来国内外相关研究,本文对大气颗粒物中有机硝酸酯的形成机制、测定技术和估算方法进行了总结。随着测定技术的不断发展,外场观测已成为颗粒相有机硝酸酯的主要研究方法。热解析管激光诱导荧光系统(TD-LIF)和气溶胶质谱(AMS)为颗粒相有机硝酸酯的总量估算提供了方法,同时其较高时间分辨率的测定方法也为研究有机硝酸酯的大气行为提供更多信息。化学电离源质谱(CIMS)可以提供颗粒相有机硝酸酯的分子信息,有望在外场观测中得到广泛运用。在未来研究中,将外场观测研究、模型模拟和烟雾箱模拟实验相互结合,以实现对颗粒相有机硝酸酯的前体物追踪、大气化学过程的深入了解,为揭示大气颗粒物中有机硝酸酯的生成机制提供新的方向。
[Abstract]:Organic nitrate esters are the products of the reaction of volatile organic compounds with free radicals in the atmosphere. The semi-volatile organic nitrate esters in the gas phase can enter the granular phase through oxidation reaction or gas-particle partitioning, which is an important part of the secondary organic compounds. It has gradually aroused the widespread concern of atmospheric chemistry researchers. There are many molecular types and complex physicochemical properties of granular organic nitrate ester, and the determination of its whole component is very difficult, so the present research is still limited. Based on the related research at home and abroad in recent years, this paper summarizes the formation mechanism, determination technique and estimation method of organic nitrate ester in atmospheric particulates. With the development of measurement technology, field observation has become the main research method of particulate organic nitrate. The thermal analysis tube laser induced fluorescence system (TD-LIFs) and aerosol mass spectrometry (AMSs) provide a method for estimating the total amount of organic nitrate in the granular phase, and its higher temporal resolution provides more information for the study of the atmospheric behavior of organic nitrate esters. Chemical ionization source mass spectrometry (CIMS) can provide molecular information of particulate organic nitrate, which is expected to be widely used in field observation. In the future research, the field observation, model simulation and smoke box simulation experiments are combined to realize the further understanding of the precursor of particulate organic nitrate and the atmospheric chemical process. It provides a new direction for revealing the formation mechanism of organic nitrate in atmospheric particulates.
【作者单位】：北京大学环境科学与工程学院环境模拟与污染控制国家重点联合实验室;
【基金】：国家自然科学基金项目(No.91544214,41421064,51636003) 国家重点基础研究发展计划(No.2013CB228503)资助~~
【分类号】：X513

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