太湖沉积物中酮的提取、分离及GC-MS测定

The Extraction, Isolation and Determination of Ketone in the Sediment of Taihu Lake

中文关键词:  太湖  沉积物  酮  GC－MS

英文关键词:Taihu lake  sediment  ketone  GC-MS

中文摘要:

      用索氏抽提法提取了太湖沉积物中的可溶性有机质,用不同极性溶剂在硅胶/氧化铝柱上分离了饱和烃、芳烃、酮馏分。利用GC-MS对酮组份进行了分析。沉积物中检出了一系列呈等间距分布的正构烷基-2-酮:C₁₄至C₃₃,主峰为C₂₉,具有强烈的奇碳数优势。在C₁₆至C₁₇之间检出了丰度很高的C₁₈类异戊二烯酮。采用保留时间、质谱图和标准图谱相结合的方法对酮化合物加以鉴定。

英文摘要:

      The extractable lipids were isolated using soxhlet extraction method in the surficial sediment of Taihu lake. The ketones were fractionated on an activated SiO₂/Al₂O₃ column with hexane/ethylacetate (9:1,V/V) solvent. The ketone fraction was analyzed by GC-MS instrument. A series of alkan-2-ones were detected in the sediment samples of Taihu lake. The distribution range of carbon number was C₁₄C₃₃, major peak was C₂₉ with high OEP(odd to even predominance index). 6,10,14-trimethyl pentadecan-2-one between the peaks of C₁₆ and C₁₇ with high abundance was also found. All the ketone compounds were identified by the analysis of their mass-spectrogram, retention time and the standard mass-spectrogram.