作　　者： ; ; ; ; ;

机构地区： 同济大学

出　　处： 《分析化学》 2005年第2期150-154,共5页

摘　　要： 通过原位裂解 色谱 质谱(Py GC MS)技术,应用直接裂解和原位裂解甲基化两种手段,从分子水平 研究了Pahokee泥炭腐殖酸的来源和组成特征,结果表明:两种裂解方式都得到大量芳香结构的裂解产物,少 量游离脂肪酸和脂肪链状结构裂解产物,以及一些含氮或呋喃结构的裂解产物,表明Pahokee泥炭腐殖酸的 形成主要与陆生木质素有关,而微生物和其他物质对腐殖酸形成也有重要贡献。 Pyrolysis-gas chromatogrpahy-mass spectrometric method and with in situ methylation were used for the study of the origin and composition characteristics of Pahokee peat humic acid. The results showed that aromatic compounds were the major pyrolysates in both pyrolytic techniques; while free fatty acids and aliphatic compounds were the minor pyrolysates. Other pyrolysates including some N-containing and furan-structure compounds were also detected. These indicated that Pahokee peat humic acid was mainly originated from plants, microorganisms and other sources inputs were also contributed to the formation of Pahokee peat humic acid. These pyrolysates and their sources analysis will provide important information for the structural composition and formation history of the Pahokee peat humic acid, and improve our knowledge of the humic acid.

关 键 词： 游离脂肪酸 原位 分子水平研究 来源 链状结构 质谱 裂解产物 裂解技术 泥炭

领　　域： [理学] [理学] [化学工程]