scholarly journals Online supercritical fluid extraction mass spectrometry (SFE-LC-FTMS) for sensitive characterization of soil organic matter

2019 ◽  
Vol 218 ◽  
pp. 157-171 ◽  
Author(s):  
Yufeng Shen ◽  
Rui Zhao ◽  
Nikola Tolić ◽  
Malak M. Tfaily ◽  
Errol W. Robinson ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Supercritical Fluid ◽  
Fluid Extraction ◽  
Technical Approach ◽  
Soil P ◽  
Subcritical Fluid Extraction ◽  
Subcritical Fluid

We report a novel technical approach for subcritical fluid extraction (SFE) for organic matter characterization in complex matrices such as soil.

Advanced Solvent Based Methods for Molecular Characterization of Soil Organic Matter by High-Resolution Mass Spectrometry

2015 ◽  
Vol 87 (10) ◽  
pp. 5206-5215 ◽  
Author(s):  
Malak M. Tfaily ◽  
Rosalie K. Chu ◽  
Nikola Tolić ◽  
Kristyn M. Roscioli ◽  
Christopher R. Anderton ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
High Resolution ◽  
Molecular Characterization ◽  
High Resolution Mass Spectrometry ◽  
High Resolution Mass ◽  
Resolution Mass

Characterization of soil organic matter with different degrees of humification using evolved gas analysis-mass spectrometry

Talanta ◽  
2016 ◽  
Vol 155 ◽  
pp. 28-37 ◽  
Author(s):  
Naoya Katsumi ◽  
Koyo Yonebayashi ◽  
Masanori Okazaki ◽  
Shun Nishiyama ◽  
Tomoe Nishi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas

Subcritical fluid extraction and supercritical fluid chromatography of carbon clusters C60 and C70

1992 ◽  
Vol 344 (10-11) ◽  
pp. 435-441 ◽  
Author(s):  
Kiyokatsu Jinno ◽  
Hideo Nagashima ◽  
Kenji Itoh ◽  
Muneo Saito ◽  
Masao Buonoshita
Keyword(s):  
Supercritical Fluid ◽  
Supercritical Fluid Chromatography ◽  
Carbon Clusters ◽  
Fluid Extraction ◽  
Subcritical Fluid Extraction ◽  
Subcritical Fluid

scholarly journals Characterization of Soil Organic Matter Individual Fractions (Fulvic Acids, Humic Acids, and Humins) by Spectroscopic and Electrochemical Techniques in Agricultural Soils

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1067
Author(s):  
Aleksandra Ukalska-Jaruga ◽  
Romualda Bejger ◽  
Guillaume Debaene ◽  
Bożena Smreczak
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Humic Substances ◽  
Humic Acids ◽  
Agricultural Soils ◽  
Fulvic Acids ◽  
Sorption Properties ◽  
Aliphatic Chains

The objective of this paper was to investigate the molecular characterization of soil organic matter fractions (humic substances (HS): fulvic acids-FAs, humic acids-HAs, and humins-HNs), which are the most reactive soil components. A wide spectrum of spectroscopic (UV–VIS and VIS–nearIR), as well as electrochemical (zeta potential, particle size diameter, and polydispersity index), methods were applied to find the relevant differences in the behavior, formation, composition, and sorption properties of HS fractions derived from various soils. Soil material (n = 30) used for the study were sampled from the surface layer (0–30 cm) of agricultural soils. FAs and HAs were isolated by sequential extraction in alkaline and acidic solutions, according to the International Humic Substances Society method, while HNs was determined in the soil residue (after FAs and HAs extraction) by mineral fraction digestion using a 0.1M HCL/0.3M HF mixture and DMSO. Our study showed that significant differences in the molecular structures of FAs, Has, and HNs occurred. Optical analysis confirmed the lower molecular weight of FAs with high amount of lignin-like compounds and the higher weighted aliphatic–aromatic structure of HAs. The HNs were characterized by a very pronounced and strong condensed structure associated with the highest molecular weight. HAs and HNs molecules exhibited an abundance of acidic, phenolic, and amine functional groups at the aromatic ring and aliphatic chains, while FAs mainly showed the presence of methyl, methylene, ethenyl, and carboxyl reactive groups. HS was characterized by high polydispersity related with their structure. FAs were characterized by ellipsoidal shape as being associated to the long aliphatic chains, while HAs and HNs revealed a smaller particle diameter and a more spherical shape caused by the higher intermolecular forcing between the particles. The observed trends directly indicate that individual HS fractions differ in behavior, formation, composition, and sorption properties, which reflects their binding potential to other molecules depending on soil properties resulting from their type. The determined properties of individual HS fractions are presented as averaged characteristics over the examined soils with different physico-chemical properties.

scholarly journals Comparisons of soil organic matter and its fractions by pyrolysis mass-spectrometry

Geoderma ◽  
1979 ◽  
Vol 22 (1) ◽  
pp. 25-37 ◽  
Author(s):  
C. Saiz-Jimenez ◽  
K. Haider ◽  
H.L.C. Meuzelaar
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Pyrolysis Mass Spectrometry
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