GC-AED多元素模拟蒸馏在地质学中的应用研究

The Application Research of Multi-element Simulated Distillation by Gas Chromatography-Atomic Emission Detection in Geology

在气相色谱-原子发射光谱联用仪上进行原油中C,H,S,N,Ni,V,Fe多元素的模拟蒸馏研究。考察和讨论了不同形状进样衬管的沸点歧视,H元素的非线性响应及其校正等影响准确模拟蒸馏测定的因素,建立了正十二烷到正九十八烷之间各正构烷烃的沸点校正曲线和各元素的校正因子参数。结果表明,模拟蒸馏沸点测定误差不超过1℃,标样测定值与标准值一致。原油多元素模拟蒸馏结果提供的特征明显,信息量大,具备相互比较基准的数据,可以详细表征石油类物质,确定其类型和来源,使油-油、油-源对比等模式识别工作有了新手段。

The study of multi-element simulated distillation for C, H, S, N, Ni, V and Fe in crude oil by gas chromatography-atomic emission detection was introduced. The distortion of various boiling point samples for injector insert of different shapes was examined, the effects of non-linear response and correction of H element on accurate detection of simulated distillation were also discussed. The correction curve of boiling point of n-alkane ranged from n-C12 to n-C98 were established, the calibration factor of each element was obtained. The result indicates that the measuring error of boiling point for n-alkane was than 1℃, the simulated distillation data of standard samples were in good agreement with the standard values. The results show that characters of multi-element simulated distillation of crude oil which have abundant information were obvious, the characters have comparable data of benchmark, all kinds of petroleum can be elucidated in detail, their source and kind can be confirmed too, therefore, the new means that can distinguish the comparable mode between oil and oil, oil and source was obtained.