The identification of oil species and their characteristics in oil spills is particularly important for their efficient disposal. Since aromatic hydrocarbons (AHs) with various characteristics are the major fluorescent components of oils in seawater, they can be used to detect different oil species in seawater. Here, we developed a composition method using the fluorescence spectra of eight AH categories analyzed by gas chromatography-mass spectrometry (GC-MS) to evaluate the contribution of AHs to the total fluorescence of six different oil species. Qualitative and quantitative difference analysis of the experimental and composite fluorescence spectra was performed based on the redshift of the main peak position, the fluorescence intensity distance, and the generalized included angle cosine, while correlation analysis was used to establish the relationship between the different fluorescence spectral parameters and the American Petroleum Institute gravity and viscosity of the oil species. The fluorescence spectra recorded for heavy oil samples indicated a reduction in the fluorescence signal of fluorene series and an increase in the contribution of acenaphthene and pyrene series, indicating that the currently developed composition method by fluorescence spectroscopy combined with GC-MS can be used to distinguish and identify oil species in seawater samples.

中文翻译：

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海水中不同油样的种类鉴定及其对荧光光谱的影响。

识别溢油中的油类及其特征对于有效处置油类尤为重要。由于具有各种特性的芳香烃（AHs）是海水中油类的主要荧光成分，因此可用于检测海水中不同的油类。在这里，我们开发了一种使用气相色谱-质谱（GC-MS）分析的八种AH类别的荧光光谱的组成方法，以评估AH对六种不同油类的总荧光的贡献。基于主峰位置的红移，荧光强度距离和广义夹角余弦，对实验荧光光谱和复合荧光光谱进行了定性和定量的差异分析，而相关分析则用于建立不同荧光光谱参数与美国石油协会重力和油类粘度之间的关系。记录的重油样品的荧光光谱表明芴系列的荧光信号降低，series和and系列的贡献增加，表明目前开发的荧光光谱结合GC-MS的组成方法可用于区分并确定海水样本中的油类。