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DOI | 10.5194/acp-17-3929-2017 |
A quantification method for heat-decomposable methylglyoxal oligomers and its application on 1,3,5-trimethylbenzene SOA | |
Rodigast, Maria; Mutzel, Anke; Herrmann, Hartmut | |
2017-03-23 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Methylglyoxal forms oligomeric compounds in the atmospheric aqueous particle phase, which could establish a significant contribution to the formation of aqueous secondary organic aerosol (aqSOA). Thus far, no suitable method for the quantification of methylglyoxal oligomers is available despite the great effort spent for structure elucidation. In the present study a simplified method was developed to quantify heat-decomposable methylglyoxal oligomers as a sum parameter. The method is based on the thermal decomposition of oligomers into methylglyoxal monomers. Formed methylglyoxal monomers were detected using PFBHA (o- (2,3,4,5,6-pentafluorobenzyl) hydroxylamine hydrochloride) derivatisation and gas chromatography-mass spectrometry (GC/MS) analysis. The method development was focused on the heating time (varied between 15 and 48 h), pH during the heating process (pH = 1-7), and heating temperature (50, 100 degrees C). The optimised values of these method parameters are presented. The developed method was applied to quantify heat-decomposable methylglyoxal oligomers formed during the OH-radical oxidation of 1,3,5-trimethylbenzene (TMB) in the Leipzig aerosol chamber (LEipziger AerosolKammer, LEAK). Oligomer formation was investigated as a function of seed particle acidity and relative humidity. A fraction of heat-decomposable methylglyoxal oligomers of up to 8% in the produced organic particle mass was found, highlighting the importance of those oligomers formed solely by methylglyoxal for SOA formation. Overall, the present study provides a new and suitable method for quantification of heat-decomposable methylglyoxal oligomers in the aqueous particle phase. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397934200001 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; CATALYZED ALDOL CONDENSATION ; ICR MASS-SPECTROMETRY ; OH RADICAL OXIDATION ; GAS-PHASE OZONOLYSIS ; LOW-MOLECULAR-WEIGHT ; RELATIVE-HUMIDITY ; AQUEOUS-PHASE ; HETEROGENEOUS REACTIONS ; AMMONIUM-SULFATE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18350 |
专题 | 地球科学 |
作者单位 | Leibniz Inst Tropospher Res TROPOS, Atmospher Chem Dept, Permoserstr 15, D-04318 Leipzig, Germany |
推荐引用方式 GB/T 7714 | Rodigast, Maria,Mutzel, Anke,Herrmann, Hartmut. A quantification method for heat-decomposable methylglyoxal oligomers and its application on 1,3,5-trimethylbenzene SOA[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(6). |
APA | Rodigast, Maria,Mutzel, Anke,&Herrmann, Hartmut.(2017).A quantification method for heat-decomposable methylglyoxal oligomers and its application on 1,3,5-trimethylbenzene SOA.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(6). |
MLA | Rodigast, Maria,et al."A quantification method for heat-decomposable methylglyoxal oligomers and its application on 1,3,5-trimethylbenzene SOA".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.6(2017). |
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