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Determination of polycyclic aromatic hydrocarbons with molecular mass 302 in Standard Reference Material 1597a by reversed-phase liquid chromatography and stop-flow fluorescence detection

机译：反相液相色谱和停流荧光检测法测定标准参考物质1597a中分子量为302的多环芳烃

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摘要

The identification of isomeric polycyclic aromatic hydrocarbons (PAHs) in complex samples via reversed-phase liquid chromatography (RPLC) with fluorescence detection (FL) is normally based on matching the chromatographic retention times of suspected peaks of interest with reference standards. Since no spectral information is obtained during the chromatographic run, the accurate identification of co-eluting PAHs with similar chromatographic behaviors requires confirmation with additional chromatographic methods. This is particularly true for the analysis of PAH isomers with the relative molecular mass (MM, g/mol) 302. The work presented here explores the information content of room-temperature fluorescence spectra for the analysis of PAHs with MM 302 in the Standard Reference Material (SRM) 1597a. Fluorescence spectra were recorded under stop-flow conditions with the aid of a commercial HPLC system. Of the 21 MM 302 PAHs known to be present in the SRM 1597a, 20 were tentatively identified based on retention times and the presence of 18 was confirmed based on excitation and emission spectral profiles.
机译：通常，通过反相液相色谱（RPLC）和荧光检测（FL）鉴定复杂样品中的异构多环芳烃（PAH），通常是基于将相关峰的色谱保留时间与参考标准进行匹配。由于在色谱运行过程中未获得光谱信息，因此要准确鉴定具有相似色谱行为的共洗脱多环芳烃，需要使用其他色谱方法进行确认。对于具有相对分子质量（MM，g / mol）302的PAH异构体的分析尤其如此。此处介绍的工作探索了标准参考文献中用于MM 302分析PAH的室温荧光光谱的信息内容。材料（SRM）1597a。借助于商业HPLC系统在停止流动条件下记录荧光光谱。在SRM 1597a中已知存在的21 MM 302 PAH中，根据保留时间初步确定了20种，并且根据激发和发射光谱图确认了18种。

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