Leibniz-Institut für Troposphärenforschung (IfT), Permoserstr. 15, D-04318 Leipzig, Germany.
Environ Sci Technol. 2010 Nov 15;44(22):8453-9. doi: 10.1021/es102938a.
Detailed chemical analysis of wintertime PM₁₀ 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 PM₁₀were 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.
对采集于德国一个农村地区的冬季 PM₁₀进行的详细化学分析表明，存在一系列与左旋葡聚糖密切相关的化合物，左旋葡聚糖是一种已知的生物质燃烧示踪化合物。具有分子式 C₇H₇NO₄（M(w) 169）的硝代芳烃化合物与左旋葡聚糖的相关性特别好，表明它们也来自生物质燃烧。这些化合物根据其色谱和质谱行为与参考化合物的比较，被鉴定为一系列甲基-硝基儿茶酚异构体（4-甲基-5-硝基儿茶酚、3-甲基-5-硝基儿茶酚和 3-甲基-6-硝基儿茶酚）。气溶胶室实验表明，间甲酚作为生物质燃烧的重要排放物，是所检测到的甲基-硝基儿茶酚的前体。这些化合物在冬季 PM₁₀中的总浓度高达 29 ng m⁻³，表明源自生物质燃烧 VOC 氧化的二次有机气溶胶（SOA）对区域有机气溶胶负荷的贡献不可忽视。
