GC-AED Measurement for Organic Sulphur Compounds and Its Tentative Applications in petroleum Geology
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摘要: 在有机地化研究中，人们越来越认识到含杂元子（Ｓ、Ｏ、Ｎ等）有机化合物的重要性。近年来一些研究者利用色谱－质谱和火焰光度检测等方法对含有机质物进行了分析和研究，但通常由于灵敏度、选择性差和共洗涤性，因此这两种方法不够理想。本文利用近年新开发的色谱－等离体原子发射光谱技术对我国不同环境的原油中的含硫化合物进行了分析和研究。结果表明该技术对有机含硫化合物的分析与检测，具有高的灵敏度和强的选择性，对原油中的含硫化合物能有效地分离和鉴定。初步研究结果表明，不同沉积环境中形成的原油其含硫化合物的分布特征具有明显的差别，海相碳酸盐岩生成的原油具有丰富的含硫化合物，而内陆淡水湖相和沼泽相源岩生成的原油在仪器的检测范围未发现含硫化合物，这将给油一源对比提供一种新的有效手段。Abstract: Heterocyclic compounds (e. g., N,O,S compounds) have been arousing more and more attention in geochemical stydies. The conventional techniques for measurements of organic sulphur compounds are GC-MS and GC-FPD. But these are limited, at least to some degree, by specificity, sensitivity and co-elution. In the present study,GC-AED (Gas Chromatagraph with Atomatic Emission Detector) was applied to the measurement for organic sulphur compounds in oils from different sedimentary environments in China. The results show that the high specificity and sensitivitiy of the GC-AED make it advantageous in analyses for these heterocyclic compounds. There exists obvious difference in concentration and distribution of organic sulphur compounds among different sedimentary environments: Oils devived from marine carbonate often have a much more higher content of organic sulphur compounds than those from rocks of terrestrial fresh water and swamp depositional factes. This may be useful in oil-to-oil and oil-to-source correlations.
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