【摘要】 在生物标记化合物研究中,C₂₇、C₂₈、C₂₉甾烷的相对分布是最广泛地被用来探讨母源输入方法之一。这些参数通常根据 GC/MS 分析数据计算而得,为此需费很长时间对样品进行前处理和作 GC/MS 分析。本文介绍了一种新方法,即采用 MS/MS 技术,用原油等直接进样,快速地（仅几分钟）测出 m/z 217的母离子 m/z 372、386和400的累计相对含量。对用这新方法所分析的22个海相原油和37个陆相原油成果作对应分析统计,得到的规律与用 GC/MS 研究所得相似。本方法在样品量极少情况下更有特殊的意义。更多还原

【Abstract】 The relative distribution of C₂₇,C₂₈ and C₂₉ steranes is one of the most ex- tensively applied technique of source input in biomarker investigation.These parameters used to be obtained through a processing of GC/MS data,which is a time-consuming process including sample preparation and CC/MS analysis. Instead,a new method of tandem mass spectrometry,for the rapid determin- ation of the cumulative relative contents of m/z 217 parent ions,i.e.m/z 372,386 and 400,is reported here in.In the new technique,the statistical relationship from analyses of 22 marine oils and 37 non-marine oils is obtained and correlated to those from conventional in GC/MS investigation showing a good similarity.The new method is of useful,specially in case of small qu- antity of samples.更多还原