空气负离子对室内有机污染物降解机理的质谱研究
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- 英文论文题名：Investigating degrading mechanism of indoor organic contaminants by negative air ions through mass spectrometry
- 论文作者：李宇 ; 张定坤 ; 李海芳 ; 林金明
- 英文论文作者：Yu Li ; Dingkun Zhang ; Haifang Li ; Jin-Ming Lin ; Department of Chemistry ; Tsinghua University
- 年：2016
- 作者机构：清华大学化学系;
- 论文关键词：空气负离子 ; 质谱 ; 电晕放电 ; 室内有机污染物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十三分会：质谱分析
- 语种：中文
- 分类号：X51
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十三分会 ; 质谱分析
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：137k
- 原文格式：D
- 会议级别：全国
摘要
空气负离子由于具有较高的反应活性和对有机污染物优异的降解性能等显著特点,引起了人们广泛的关注。然而,空气负离子的降解作用机理目前还不清楚,这限制了其在环境领域的进一步应用。在本工作中,研究了空气负离子的形成过程及其对室内有机污染物如醛类、苯同系物类和酯类的降解行为。通过电晕放电产生空气负离子,将其与室内有机污染物在线混合反应并导入质谱进行实时监测,研究空气负离子对不同种类室内有机污染物的降解规律。实验结果证实空气负离子能够对醛类、苯同系物类和酯类化合物具有较好的降解作用。该方法能扩展用于常规电喷雾质谱难以检测的物质的电离或用于气态离子和其它化合物相互作用的研究。
Negative air ions,with their high reactivity,excellent potential in degradation of organic compounds,have drawn more and more attention recently.However,the degradation mechanism is unclear,which limits its further application in environmental fields.In this work,the evolution of negative air ions and relevant degrading performance on indoor organic contaminants(IOCs) such as aldehydes,benzene homologues and esters were investigated using mass spectrometry.Negative air ions produced through corona discharge were mixed with indoor air contaminants online,which helped us to conclude principles according to different reactants.The experimental results confirmed that negative air ions have excellent ability in the degradation of those compounds.It was believed that this strategy could be extended to the ionization of substance which was difficult for traditional ESI source.The efficient ionization of IOCs was realized on home-made platform which proved to be a powerful tool to study interactions between gaseous ions and various chemical compounds.
Negative air ions,with their high reactivity,excellent potential in degradation of organic compounds,have drawn more and more attention recently.However,the degradation mechanism is unclear,which limits its further application in environmental fields.In this work,the evolution of negative air ions and relevant degrading performance on indoor organic contaminants(IOCs) such as aldehydes,benzene homologues and esters were investigated using mass spectrometry.Negative air ions produced through corona discharge were mixed with indoor air contaminants online,which helped us to conclude principles according to different reactants.The experimental results confirmed that negative air ions have excellent ability in the degradation of those compounds.It was believed that this strategy could be extended to the ionization of substance which was difficult for traditional ESI source.The efficient ionization of IOCs was realized on home-made platform which proved to be a powerful tool to study interactions between gaseous ions and various chemical compounds.
引文
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[2]Ewing R.G.;Atkinson D.A.;Clowers B.H.Anal.Chem.2012,85,389-397.
[3]Cheng S.;Wang W.;Zhou Q.;Chen C.;Peng L.Anal.Chem.2014,86,2687-2693.
[4]Sekimoto K.;Sakai M.;Takayama M.J.Am.Soc.Mass Spectr.2012,23,1109-1119.
[2]Ewing R.G.;Atkinson D.A.;Clowers B.H.Anal.Chem.2012,85,389-397.
[3]Cheng S.;Wang W.;Zhou Q.;Chen C.;Peng L.Anal.Chem.2014,86,2687-2693.
[4]Sekimoto K.;Sakai M.;Takayama M.J.Am.Soc.Mass Spectr.2012,23,1109-1119.
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