Abstract Derivative UV-vis spectroscopy increases the resolution of the bands obtained in a zero-order using the first and second derivative. The first derivative of UV-vis spectrum of asphaltenes solutions allows identification of 5 maximums: to 225 nm benzenic compounds, to 259 nm naphthenic compounds, to 295 nm phenanthrene, to 328 nm for linear three-ring aromatic chromophores and by most compact four-ring chromophores and 401 nm for vanadium petroporfirins. Calculation of the form factor indicates the presence of suspended colloids and particles. The results obtained confirm the presence of archipelago-type architecture in the asphaltenes analyzed.

中文翻译：

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用于测定组成的沥青质溶液的衍生紫外-可见光谱

摘要 导数紫外-可见光谱提高了使用一阶和二阶导数在零阶中获得的谱带的分辨率。沥青质溶液 UV-vis 光谱的一阶导数允许识别 5 个最大值：至 225 nm 苯化合物、至 259 nm 环烷化合物、至 295 nm 菲、至 328 nm 线性三环芳香发色团和最紧凑的四-环发色团和 401 nm 用于钒石油卟啉。形状因子的计算表明存在悬浮胶体和颗粒。获得的结果证实了所分析的沥青质中存在群岛型结构。