Chemical Fingerprinting of Mobile Volatile Organic Compounds in Soil by Dynamic Headspace–Thermal Desorption-Gas Chromatography-Mass Spectrometry

The chemical analysis of organic compounds in environmental samples is often targeted on predetermined analytes. A major shortcoming of this approach is that it invariably excludes a vast number of compounds of unknown relevance. Nontargeted chemical fingerprinting analysis addresses this problem by...

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Bibliographic Details
Published in:LC GC North America 2018-09, Vol.36 (9), p.672-683
Main Authors: Christensen, Peter, Dela Cruz, Majbrit, Tomasi, Giorgio, Nielsen, Nikoline J, Borggaard, Ole K, Christensen, Jan H
Format: Magazinearticle
Language:English
Subjects:
Analytical chemistry
Beech
Chemical analysis
Chemical compounds
Chemical fingerprinting
Chromatography
Data analysis
Desorption
Drying ovens
Environmental protection
Gas chromatography
Gas flow
Hydrocarbons
Mass spectrometry
Methods
Organic chemistry
Organic compounds
Organic soils
Qualitative analysis
Scientific imaging
Soil dynamics
Soil investigations
Soil sciences
Soil testing
Soils
Solvent extraction processes
Spectroscopy
Taxonomy
Temperature
VOCs
Volatile organic compounds
Volatility
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Summary:The chemical analysis of organic compounds in environmental samples is often targeted on predetermined analytes. A major shortcoming of this approach is that it invariably excludes a vast number of compounds of unknown relevance. Nontargeted chemical fingerprinting analysis addresses this problem by including all compounds that generate a relevant signal from a specific analytical platform, and so more information about the samples can be obtained. A dynamic headspace-thermal desorption-gas chromatography-mass spectrometry (DHS-TD-GC-MS) method for the fingerprinting analysis of mobile volatile organic compounds (VOCs) in soil is described and tested in this article. The analysis parameters, sorbent tube, purge volume, trapping temperature, drying of sorbent tube, and oven temperature were optimized through qualitative and semiquantitative analysis. The DHS-TD-GC-MS fingerprints of soil samples from three sites with spruce, oak, or beech were investigated by pixel-based analysis, a nontargeted data analysis method.
ISSN:1527-5949
1939-1889