Pyrolysis–GC–MS for Investigating High‐Molecular‐Weight THM Precursors and Other Refractory Organics

Bruchet, A.; Rousseau, Claudine; Mallevialle, J.

doi:10.1002/j.1551-8833.1990.tb07022.x

Cited by 114 publications

(59 citation statements)

References 13 publications

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“…The peak areas of select pyrochromatogram byproducts can also be used to estimate the relative proportion of the major biopolymers in the original organic matrix (32). The variability of the biopolymer distribution of NOM fractions determined by the pyrolysis approach agreed with the structural differences inferred from other analytical techniques, such as 13 C NMR, elemental analysis, and specific component analyses.…”

Section: Range Ofmentioning

confidence: 52%

Peer Reviewed: Characterizing Aquatic Dissolved Organic Matter

Leenheer¹,

Croué²

2003

Environ. Sci. Technol.

1,161

575

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Section: Range Ofmentioning

confidence: 52%

Peer Reviewed: Characterizing Aquatic Dissolved Organic Matter

Leenheer¹,

Croué²

2003

Environ. Sci. Technol.

1,161

575

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“…The information gained from TMAH-Py-GC/MS analyses is only semi-quantitative; for example, although the sample is almost entirely burned during the pyrolysis process, significant amounts of carbon are transformed into small molecules such as HCN, CO 2 , and CH 4 which are difficult to quantify (Bruchet et al 1990). Additionally, it is important to consider that TMAH-Py-GC/MS produces the methyl esters of carboxylic acids and methyl ether of alcohols (Challinor 1989).…”

Section: Peat and Litter Characterizationmentioning

confidence: 99%

Getting to the root of the problem: litter decomposition and peat formation in lowland Neotropical peatlands

et al. 2015

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Litter decomposition is an important control on carbon accumulation in tropical peatlands. We investigated the contribution of different litter tissues from two peatland tree species (Raphia taedigera and Campnosperma panamensis) to peat formation in four lowland tropical peatlands in the Republic of Panama. Leaves, stems, and roots decomposed at different rates; with roots being the slowest to decompose among tissues. The position of litter in the peat profile strongly influenced the decomposition rate of all tissue types. Roots decomposed up to five times faster at the surface than at 50 cm depth. Molecular characterization of litter and peat profiles by tetramethylammoniumpyrolysis-gas chromatography-mass spectrometry (TMAH-Py-GC/MS) revealed that the peat is formed predominantly of decomposed roots and stems, as indicated by the high lignin, low methylated fatty acids and carbohydrate concentrations in these litter types. Taken together, these data demonstrate that roots play a fundamental role in the formation of lowland Neotropical peatlands.

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“…The temperature program of the GC oven was initially maintained at 40 • C for 5 min, then increased at 7 • C min −1 to a final temperature of 300 • C and remained there for 10 min, giving a total run time of 52.14 min. The interpretation of the pyrochromatograms was conducted according to the methods described in Bruchet et al (1990).…”

Section: Sample Collection and Analysismentioning

confidence: 99%

Confirming anthropogenic influences on the major organic and inorganic constituents of rainwater in an urban area

Chon

Kim

Bae

et al. 2015

Drink. Water Eng. Sci.

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Abstract.Recently, rainwater composition affected by atmospheric pollutants has been the topic of intense study in East Asia because of its adverse environmental and human health effects. In the present study, the chemical composition and organic compounds of rainwater were investigated from June to December 2012 at Gwangju in Korea. The aim of this study is to determine the seasonal variation of rainwater chemical composition and to identify possible sources of inorganic and organic compounds. The volumeweighted mean of pH ranged from 3.83 to 8.90 with an average of 5.78. Of rainwater samples, 50 % had pH values below 5.6. The volume-weighted mean concentration (VWMC) of major ions followed the orderThe VWMC of trace metals decreased in the order Zn > Al > Fe > Mn > Pb > Cu > Ni > Cd > Cr. The VWMCs of major ions and trace metals were higher in winter than in summer. The high enrichment factors indicate that Zn, Pb, Cu, and Cd originated predominantly from anthropogenic sources. Factor analysis (principal component analysis) indicates the influence of anthropogenic pollutants, sea salt, and crustal materials on the chemical compositions of rainwater. Benzoic acids, 1H-isoindole-1,3(2H)-dione, phthalic anhydride, benzene, acetic acids, 1,2-benzenedicarboxylic acids, benzonitrile, acetaldehyde, and acetamide were the most prominent pyrolysis fragments for rainwater organic compounds identified by pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). The results indicate that anthropogenic sources are the most important factors affecting the organic composition of rainwater in an urban area.Published by Copernicus Publications on behalf of the Delft University of Technology.

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Pyrolysis–GC–MS for Investigating High‐Molecular‐Weight THM Precursors and Other Refractory Organics

Cited by 114 publications

References 13 publications

Peer Reviewed: Characterizing Aquatic Dissolved Organic Matter

Peer Reviewed: Characterizing Aquatic Dissolved Organic Matter

Getting to the root of the problem: litter decomposition and peat formation in lowland Neotropical peatlands

Confirming anthropogenic influences on the major organic and inorganic constituents of rainwater in an urban area

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