DOI: 10.1007/s10533-016-0209-5
Scopus记录号: 2-s2.0-84963781071
论文题名: Ultrahigh-resolution FT-ICR mass spectrometry for molecular characterisation of pressurised hot water-extractable organic matter in soils
作者: Guigue J. ; Harir M. ; Mathieu O. ; Lucio M. ; Ranjard L. ; Lévêque J. ; Schmitt-Kopplin P.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期: 3 起始页码: 307
结束页码: 326
语种: 英语
英文关键词: Chemometrics
; Fourier transform-ion cyclotron resonance-mass spectrometry
; Molecular composition
; Soil organic matter
; Water-extractable organic matter
Scopus关键词: aliphatic hydrocarbon
; extraction method
; forest soil
; grassland soil
; heterogeneity
; mass spectrometry
; molecular analysis
; organohalogen
; pH
; soil organic matter
; temperature profile
; Bourgogne
; France
英文摘要: Dissolved organic matter in soil is a highly reactive pool of organic matter and is of great importance for biogeochemical cycles in soil. A better understanding of its dynamics relies on its molecular characterisation. Here, the molecular composition of water-extracted organic matter at elevated pressure and temperature (PH-WEOM) obtained from 120 Burgundy soils was investigated using high-field Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR MS). Unsupervised multivariate statistical analysis (UMSA) was used to retrieve classes of samples with specific molecular characteristics. Accordingly, van Krevelen diagram, Kendrick mass defect (KMD), as well as aromaticity index (AI) and aromaticity equivalent (Xc), were applied to present a pool of ubiquitous molecular formulas and to evaluate the PH-WEOM molecular heterogeneity in the sample set. Based on UMSA, the PH-WEOM from forest soils revealed a clearly distinct molecular composition, with major contributions from lignin- and tannin-like compounds, and with its aromaticity related to soil characteristics, especially the soil pH. No clear evidence of land-cover influence on the PH-WEOM molecular composition was found for cropland and grassland soils, but the role of pH was also identified for these samples, and agrees with molecular patterns attributed to microbial activity, with the presence of compounds with high H/C ratio. A group of samples from cropland soils developed on residual formations is characterised by a very specific molecular composition, rich in aliphatic organosulfur-like compounds, highlighting the importance of specific soil processes in the molecular composition of PH-WEOM. This work demonstrates the potential of FT-ICR MS to resolve the high chemical complexity of PH-WEOM in soils and the intricate influences of both biotic and abiotic environmental factors on the molecular composition of PH-WEOM in soils. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83389
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: UMR 6282 Biogéosciences, CNRS - Université Bourgogne Franche-Comté, Dijon, France; Laboratory of Plant Nutrition and Soil Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Japan; Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany; UMR 1347 Agroécologie, INRA – AgroSup Dijon – Université Bourgogne, Dijon, France; Chair of Analytical Food Chemistry, Technische Universität München, Freising-Weihenstephan, Germany
Recommended Citation:
Guigue J.,Harir M.,Mathieu O.,et al. Ultrahigh-resolution FT-ICR mass spectrometry for molecular characterisation of pressurised hot water-extractable organic matter in soils[J]. Biogeochemistry,2016-01-01,128(3)