Detailed chemical analysis of wintertime PM(1)(0) 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 C(7)H(7)NO(4) (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 PM(1)(0)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.

中文翻译：

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甲基硝基邻苯二酚：用于生物质燃烧的二次有机气溶胶的大气示踪剂化合物。

在德国一个乡村村庄收集的冬季PM（1）（0）的详细化学分析显示，存在一系列与左旋葡聚糖（一种已知的燃烧生物质的示踪剂化合物）非常相关的化合物。分子式为C（7）H（7）NO（4）（M（w）169）的硝化芳族化合物与左旋葡聚糖的相关性特别好，表明它们也源自生物质燃烧。根据色谱图和质谱图与色谱图和质谱图的比较，将这些化合物鉴定为一系列甲基-硝基邻苯二酚异构体（4-甲基-5-硝基邻苯二酚，3-甲基-5-硝基邻苯二酚和3-甲基-6-硝基邻苯二酚）。气溶胶室实验表明，生物质大量燃烧排放的间甲酚是检测到的甲基-硝基邻苯二酚的前体。