Characterization of organic matter in dusts and fluvial sediments from exposed areas of downtown Prague, Czech Republic

Molecular properties of ultrafiltered dissolved organic matter and dissolved black carbon in headwater streams as determined by pyrolysis-GC⿿MS

“…The detection of 3-acetamido-4-pyrone is also generated from chitin-derived DOM [42]. The large proportions of benzonitriles (benzonitrile and methylbenzonitriles), especially when unambiguous proteinaceous products such as benzene propanitrile are absent, are associated with N-containing structures in the DBC [28,34]. This is in agreement with the significant correlation between benzonitriles and PAHs for this sample set (r 2 =0.67; P<0.05).…”

“…However, Py-GC-MS has been shown to provide valuable information on source materials and degree of thermochemical alteration of BC [22,24,25]. The pyrolysis products which indicate the presence of BC include monocyclic and polycyclic aromatic hydrocarbons (MAHs/PAHs) [26,27], N-and O-containing aromatic compounds such as benzonitriles [21,28] and (di)benzofurans [29,30]. The degree of polycondensation of BC is reflected by the abundance of alkyl-cross bridges between aromatic moieties, and indicated by the ratios of benzene-to-toluene (B/T) and naphthalene-to-methylnaphthalenes (N/C 1 N) [22,23,31].…”

Characterization of macromolecular organic matter in atmospheric dust from Guangzhou, China

“…Another pronounced feature of the HA was its low aromatic and oxygen-substituted aromatic carbon content, with an aromaticity of 23.43%. These features are similar to hulis from aerosols reported in the literature (Krivácsy et al, 2000;Sýkorová et al, 2009).…”

“…As yet, these isolation and characterization approaches have not been applied to dust, although hulis and BC in aerosol have been widely studied in the past (Havers et al, 1998;Krivácsy et al, 2000;Dinar et al, 2006;Taraniuk et al, 2007;Kirchstetter et al, 2008;Dutkiewicz et al, 2009;Sýkorová et al, 2009). In the present study, we isolated HAs, kerogen and black carbon (KB) and BC from dust collected in Guangzhou, China, and then characterized the chemical composition of the fractionated macromolecule organic matter using elementary analysis (EA), X-ray diffraction (XRD), organic petrographic examination (OPE), scanning electron microscopy (SEM), solid state 13 C cross-polarization and magic angle spinning nuclear magnetic resonance spectroscopy ( 13 C-CP/MAS NMR) and Fourier transformed infrared spectroscopy (FTIR).…”

How Useful is Pyrolysis‐GC/MS for the Assessment of Molecular Properties of Organic Matter in Archaeological Pottery Matrix? An Exploratory Case Study from North‐West Spain

“…2008b; Sýkorová et al . ). Most of the amino acids from peptidic and proteinaceous matter produce, amongst others, pyrroles, diketodipyrrole and indoles upon pyrolysis, which were not detected, confirming that the N‐compounds originated largely from thermally modified biomass.…”