ASE3OO与快速索氏抽提仪处理沉积岩样品的地化参数对比

本文对加速溶剂萃取仪(ASE300)和快速索氏抽提仪提取的氯仿沥青“A”及由其分离出的饱和烃、芳烃、胶质和沥青质组分做了详细对比.结果表明:多数情况下ASE300抽提出的氯仿沥青“A”的量比快速索氏抽提仪抽提出的量略多,主要是胶质和沥青质量的增加；不同抽提装置得到的饱和烃和芳烃组分的色谱-质谱谱图高度一致,定量结果的相对偏差在5％以内.各组分的稳定碳同位素分析精度±0.5‰.所有的地化参数表明ASE300完全可以替代快速索氏抽提仪,从而降低消耗、提高分析效率.

The Comparison of Geochemical Parameters of Sedimentary Rock Samples Extracted by ASE300 and Fast Soxhlet Apparatus

Two groups of chloroform bitumen "A" samples were separated from some selected sedimentary rock samples using an accelerated solvent extraction apparatus(ASE300) and a fast Soxhlet extraction apparatus,respectively.The geochemical parameters of saturated hydrocarbons,aromatics,resin and asphaltene from the different chloroform bitumen "A" sample groups were systematically studied and compared.The experiment results showed that the obtained amounts of chloroform bitumen "A" are slightly higher using the ASE300 than using the fast Soxhlet in most cases,and that the main increments of using ASE300 are resin and asphaltene.GC-MS study indicated that saturated and aromatic hydrocarbons extracted from two groups of chloroform bitumen "A" samples are highly consistent,the deviations of the quantitative results are less than 5%,the differences of measured carbon stable isotope compositions for any identical component obtained respectively from two extraction methods fall into the range of ± 0.5‰.These results indicated that ASE300 and fast Soxhlet extracted instruments are comparative.Therefore,the ASE300,the relatively consumption saving and analytically efficient method,can replace the fast Soxhlet extraction apparatus in geochemical pretreatment experiments.