Methyl-Nitrocatechols: Atmospheric Tracer Compounds for Biomass Burning Secondary Organic Aerosols

被引：227

作者：

Iinuma, Yoshiteru ^{[1
]}

Boege, Olaf ^{[1
]}

Graefe, Ricarda ^{[1
]}

Herrmann, Hartmut ^{[1
]}

机构：

[1] Leibniz Inst Tropospharenforsch IfT, D-04318 Leipzig, Germany

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2010年 / 44卷 / 22期

关键词：

GAS-PHASE REACTIONS; FINE-PARTICLE EMISSIONS; RING-RETAINING PRODUCTS; AIR-POLLUTION SOURCES; RATE CONSTANTS; OH RADICALS; M-CRESOL; PHOTOCHEMICAL OXIDATION; FIREPLACE COMBUSTION; HYDROXYL RADICALS;

D O I：

10.1021/es102938a

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Detailed chemical analysis of wintertime PK10 collected at a rural village site in Germany showed the presence of a series of compounds that correlated very well with levoglucosan, a known biomass burning tracer compound. Nitrated aromatic compounds with molecular formula C7H7NO4 (M-w 169) correlated particularly well with levoglucosan, indicating that they originated from biomass burning as well. These compounds were identified as a series of methyl-nitrocatechol isomers (4-methyl-5-nitrocatechol, 3-methyl-5-nitrocatechol, and 3-methyl-6-nitrocatechol) based on the comparison of their chromatographic and mass spectrometric behaviors to those from reference compounds. Aerosol chamber experiments suggest that m-cresol, which is emitted from biomass burning at significant levels, is a precursor for the detected methyl-nitrocatechols. The total concentrations of these compounds in the wintertime PM10 were as high as 29 ng m(-3), indicating the secondary organic aerosol (SOA) originating from the oxidation of biomass burning VOCs contributed non-negligible amounts to the regional organic aerosol loading.

引用

页码：8453 / 8459

页数：7