Molecular-scale investigation of soil fulvic acid and water-extractable organic matter by high-resolution mass spectrometry and H-1 NMR spectroscopy

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Molecular-scale investigation of soil fulvic acid and water-extractable organic matter by high-resolution mass spectrometry and H-1 NMR spectroscopy
	Han, Ruixia ; Lv, Jitao ; Luo, Lei ; Wen, Bei ; Zhang, Shuzhen
刊名	ENVIRONMENTAL CHEMISTRY
	2019-03
卷号	16 期号:2 页码:92-100
ISSN号	1448-2517
英文摘要	Dissolved organic matter (DOM) is the most active fraction of soil organic matter (SOM), which has both environmental and geochemical importance. However, the extraction of DOM from soils is still ambiguous. Instead, operational concepts, such as fulvic acid (FA) and water-extractable organic matter (WEOM), are widely used in practice. In this study, the molecular components of FA and WEOM extracted from two standard soils were investigated by using electrospray ionisation coupled with Fourier-transform ion cyclotron resonance mass spectrometry and proton nuclear magnetic resonance (H-1 NMR) spectroscopy to clarify the molecular similarities and differences between them. The results revealed that WEOM and FA shared many of the same molecules, which accounted for 64% and 82% of the total numbers of molecules for WEOM and FA respectively. However, WEOM displayed higher chemical and molecular diversities than FA. Detailed analysis revealed that the extraction and desalination procedure of FA led to the loss of lignin, protein and carbohydrate compounds, but induced preferential release of some tannin-like molecules from the aggregateor organic mineral-associated SOM. Based on the results of the present study, water extraction combined with desalination through a functionalised styrene divinylbenzene polymer-based solid phase extraction is more reliable to retain the molecular diversity of soil DOM.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42980]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Ecoenvironm Sci Res Ctr, POB 2871, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Han, Ruixia,Lv, Jitao,Luo, Lei,et al. Molecular-scale investigation of soil fulvic acid and water-extractable organic matter by high-resolution mass spectrometry and H-1 NMR spectroscopy[J]. ENVIRONMENTAL CHEMISTRY,2019,16(2):92-100.
APA	Han, Ruixia,Lv, Jitao,Luo, Lei,Wen, Bei,&Zhang, Shuzhen.(2019).Molecular-scale investigation of soil fulvic acid and water-extractable organic matter by high-resolution mass spectrometry and H-1 NMR spectroscopy.ENVIRONMENTAL CHEMISTRY,16(2),92-100.
MLA	Han, Ruixia,et al."Molecular-scale investigation of soil fulvic acid and water-extractable organic matter by high-resolution mass spectrometry and H-1 NMR spectroscopy".ENVIRONMENTAL CHEMISTRY 16.2(2019):92-100.