【摘要】 应用气相色谱－同位素质谱在线分析技术，分析了现代沉积物中单个脂肪酸碳同位素组成，研究了不同碳数脂肪酸碳同位素组成与其生物源之间的关系，探讨了脂肪酸的成因，从而找到了一种研究脂肪酸成因的新途径。更多还原

【Abstract】 Carbon isotopic compositions of individual fatty acids from modern sediments of the Nansha Sea and southern Gansu Marsh were for the first time reported. The results show that the saturated fatty acids with different carbon number differ significantly with each other in carbon isotopic composition, as well as in the origin.The light carbon isotopic compositions of C(14:0) and C(15:0) saturated fatty acids probably originated from the lipids of chemoautotrophic bacteria. The C(16:0) and C(18:0) saturated fatty acids from marine sediments are similar to the plankton lipids in carbon isotopic compositions, indicating the former may have been derived from the latter.Also the similarity of carbon isotopic compositions between the long chain saturated fatty acids (C20:0─C26:0) and the higher plant lipids suggests a genetic link between them. This study demonstrates the potential of carbon isotopic compositions of individual saturated fatty acids as a source indicator.更多还原