【摘要】 溶解性有机质(DOM)是土壤溶液中的一种常见组分,对生物地球化学和碳循环过程起着重要作用。然而由于组成复杂且难以分离,多数研究只能提供不同官能团信息以及一些分类数据,对该类化合物的组成研究非常薄弱。电喷雾电离源(ESI)结合傅里叶变换离子回旋共振质谱(FT-ICR-MS)具有超高质量分辨能力,近年来开始应用于土壤DOM分析领域。本文概述了(ESI)FT-ICR-MS高分辨率质谱检测特性,并重点阐述了依托该技术测定的土壤DOM在不同土地利用方式、土层深度和土壤温度下的组成和特征。在此基础上,指出了目前研究中(ESI)FT-ICR-MS技术存在的局限性,并提出了有待于进一步研究的一些问题。更多还原

【Abstract】 Soil organic matter(SOM) is involved in many important soil processes such as carbon sequestration and global biogeochemistry. The molecular composition and diversity of soil dissolved organic matter(DOM) are more complicated, however, most studies only identified some information about functional groups and its classification. It is still unclear what is the molecular composition of DOM in soil. Ultrahigh resolution electrospray ionization fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS) has become a powerful state-of-the-art method for analyzing the molecular characterization of SOM. This review summarized some characteristics of FT-ICR-MS and specified the molecular composition and diversity of soil DOM determined with FT-ICR-MS under different land-use types and temperatures. Finally, we proposed some problems of current research and some prospects for the future research on soil DOM.更多还原