Characterization of natural organic matter by pyrolysis/GC-MS

Natural organic matter (NOM) in nine water samples selected for the NOM typing project were characterized by pyrolysis in conjunction with gas chromatography and mass spectrometry (GC-MS). NOM samples both isolated by reverse osmosis and evaporation techniques were subjected to high temperature pyro...

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Bibliographic Details
Published in:Environment international 1999-04, Vol.25 (2), p.181-189
Main Authors: Christy, Alfred A., Bruchet, Auguste, Rybacki, D.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemistry
Hydrology. Hydrogeology
Mineralogy
Silicates
Water geochemistry
Water resources
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Summary:Natural organic matter (NOM) in nine water samples selected for the NOM typing project were characterized by pyrolysis in conjunction with gas chromatography and mass spectrometry (GC-MS). NOM samples both isolated by reverse osmosis and evaporation techniques were subjected to high temperature pyrolysis and the products obtained were assigned to one of the four main types: biopolymers carbohydrates, proteinaceous materials, N-acetylamino sugars, and polyhydroxy aromatics. These biopolymers in the water samples were quantified and the quantities were used in characterization. Principal component analysis was employed in revealing the similarities and differences between the samples and between the separation techniques. The results indicate that there are little differences between the samples, and the NOM separated by evaporation preserves most of the organic material compared to the reverse osmosis technique.
ISSN:0160-4120
1873-6750
DOI:10.1016/S0160-4120(98)00117-2