The research described here provides the most comprehensive qualitative characterization of three combustion-related standard reference materials (SRMs) for polycyclic aromatic sulfur heterocycles (PASHs) and some alkyl-substituted (alkyl-) derivatives to date: SRM 1597a (coal tar), SRM 1991 (coal tar/petroleum extract), and SRM 1975 (diesel particulate extract). An analytical approach based on gas chromatography/mass spectrometry (GC/MS) is presented for the determination of three-, four-, and five-ring PASH isomers and three- and four-ring alkyl-PASHs in the three SRM samples. The benefit of using a normal-phase liquid chromatography (NPLC) fractionation procedure prior to GC/MS analysis was demonstrated for multiple isomeric PASH groups. Using a semi-preparative aminopropyl (NH₂) LC column, the three combustion-related samples were fractionated based on the number of aromatic carbon atoms. The NPLC-GC/MS method presented here allowed for the following identification breakdown: SRM 1597a – 35 PASHs and 59 alkyl-PASHs; SRM 1991–31 PASHs and 58 alkyl-PASHs; and SRM 1975–13 PASHs and 25 alkyl-PASHs. These identifications were based on NPLC retention data, the GC retention times of reference standards, and the predominant molecular ion peak in the mass spectrum. Prior to this study, only 11, 1, and 0 PASHs/alkyl-PASHs had been identified in SRM 1597a, SRM 1991, and SRM 1975, respectively.

中文翻译：

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通过正相液相色谱和气相色谱/质谱法对多环芳族硫杂环及其烷基取代的衍生物的三种燃烧相关标准参考物质进行定性表征

此处描述的研究提供了迄今为止三种最相关的多环芳族硫杂环化合物（PASH）和一些烷基取代的（烷基）衍生物的燃烧相关标准参考材料（SRM）的定性表征：SRM 1597a（煤焦油），SRM 1991年（煤焦油/石油提取物）和SRM 1975年（柴油颗粒提取物）。提出了一种基于气相色谱/质谱（GC / MS）的分析方法，用于测定三个SRM样品中的三环，四环和五环PASH异构体以及三环和四环烷基PASH。对于多个同分异构PASH组，在GC / MS分析之前使用正相液相色谱（NPLC）分馏程序的好处已得到证明。使用半制备氨基丙基（NH ₂）LC色谱柱中，根据芳族碳原子数对三个燃烧相关的样品进行分馏。此处介绍的NPLC-GC / MS方法可用于以下识别细分：SRM 1597a – 35个PASH和59个烷基PASH；SRM 1991–31 PASH和58个烷基PASH；和SRM 1975–13 PASH和25个烷基PASH。这些鉴定是基于NPLC保留数据，参考标准品的GC保留时间以及质谱图中主要的分子离子峰。在此研究之前，分别在SRM 1597a，SRM 1991和SRM 1975中仅识别出11、1和0个PASH /烷基PASH。