Investigation of hydrocarbon constituents of a young sub-bituminous coal by gas chromatography-mass spectrometry

An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland

“…Unidentified compounds with similar mass spectra have been reported with abundant triterpenoids of higher plant origin in Miocene sediments from Baffin Bay off the west coast of Greenland (ten Haven et al, 1992) and in a sub-bituminous coal from the East 310 Elbian coal basin (Hazai et al, 1986). Relative ion peak values for the most abundant 311 monoaromatic diterpenoid observed in this study are 270 100 (Righi et al, 317 2013).…”

An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland

“…Unidentified compounds with similar mass spectra have been reported with abundant triterpenoids of higher plant origin in Miocene sediments from Baffin Bay off the west coast of Greenland (ten Haven et al, 1992) and in a sub-bituminous coal from the East 310 Elbian coal basin (Hazai et al, 1986). Relative ion peak values for the most abundant 311 monoaromatic diterpenoid observed in this study are 270 100 (Righi et al, 317 2013).…”

Contrasted distributions of triterpene derivatives in the sediments of Lake Caçó reflect paleoenvironmental changes during the last 20,000 yrs in NE Brazil

“…Such compound distributions are very comparable to those described in previous studies, especially on brown coals and lignite (Stout, 1992;Hazai et al, 1986) and are also consistent with the conditions of OM deposition and diagenesis of the considered section, at the end of the Last Glacial Maximum (ca. 18,000 yrs cal BP).…”

“…Surprisingly, the fingerprints of aromatic derivatives in samples taken at 1.6 and 4.7 m depth globally resemble those described by Stout (1992) and Hazai et al (1986) for a lignite and a sub-bituminous coal, respectively. They comprise a series of monoaromatic pentacyclic compounds with various structures and degrees of unsaturation, a series of pentacyclic triaromatics and a series interpreted as diaromatic derivatives of tetracyclic triterpenes.…”

“…Compounds displaying resembling mass spectra have been reported in sub-bituminous coals (Hazai et al, 1986), in Tertiary angiospermous lignite (Stout, 1992) and were identified with synthetic standards (Wolff et al, 1989). According to spectral data and relative retention times, compounds 11, 12 and 13 could be dinor-oleana(ursa)-1,3,5(10),13 (18) ions at m/z 145, 157 and 172, the two additional double bonds cannot be both located on rings B or C since this latter configuration would lead to dominant m/z 221 fragment (Stout, 8 1992).…”

Mutagenicity, dioxin-like activity and bioaccumulation of alkylated picene and chrysene derivatives in a German lignite

“…3c and d), and an isomer of the latter according to the identical mass spectrum, probably with varying positions of the two vicinal methyl groups at ring E. Chaffee and Fookes (1988) published the following mass spectrum for 1,2,9-trimethyl-1,2,3,4-tetrahydropicene: m/z 324 (100%), m/z 309 (75%), and m/z 279 (25%), Hazai et al (1986) reported m/z 324 (100%), m/z 309 (95%), and m/z 279 (35%) and Stout (1992) reported m/z 324 (100%), m/z 309 (60%) and m/z 279 (b25%). Our values were: m/z 324 (100%), m/z 309 (83%) and m/z 279 (27%) for compound 3 and m/z 324 (100%), m/z 309 (80%) and m/z 279 (27%) for compound 5.…”

An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland

“…Unidentified compounds with similar mass spectra have been reported with abundant triterpenoids of higher plant origin in Miocene sediments from Baffin Bay off the west coast of Greenland (ten Haven et al, 1992) and in a sub-bituminous coal from the East 310 Elbian coal basin (Hazai et al, 1986). Relative ion peak values for the most abundant 311 monoaromatic diterpenoid observed in this study are 270 100 (Righi et al, 317 2013).…”

Contrasted distributions of triterpene derivatives in the sediments of Lake Caçó reflect paleoenvironmental changes during the last 20,000 yrs in NE Brazil

“…Such compound distributions are very comparable to those described in previous studies, especially on brown coals and lignite (Stout, 1992;Hazai et al, 1986) and are also consistent with the conditions of OM deposition and diagenesis of the considered section, at the end of the Last Glacial Maximum (ca. 18,000 yrs cal BP).…”

“…Surprisingly, the fingerprints of aromatic derivatives in samples taken at 1.6 and 4.7 m depth globally resemble those described by Stout (1992) and Hazai et al (1986) for a lignite and a sub-bituminous coal, respectively. They comprise a series of monoaromatic pentacyclic compounds with various structures and degrees of unsaturation, a series of pentacyclic triaromatics and a series interpreted as diaromatic derivatives of tetracyclic triterpenes.…”

“…Compounds displaying resembling mass spectra have been reported in sub-bituminous coals (Hazai et al, 1986), in Tertiary angiospermous lignite (Stout, 1992) and were identified with synthetic standards (Wolff et al, 1989). According to spectral data and relative retention times, compounds 11, 12 and 13 could be dinor-oleana(ursa)-1,3,5(10),13 (18) ions at m/z 145, 157 and 172, the two additional double bonds cannot be both located on rings B or C since this latter configuration would lead to dominant m/z 221 fragment (Stout, 8 1992).…”

Mutagenicity, dioxin-like activity and bioaccumulation of alkylated picene and chrysene derivatives in a German lignite

“…3c and d), and an isomer of the latter according to the identical mass spectrum, probably with varying positions of the two vicinal methyl groups at ring E. Chaffee and Fookes (1988) published the following mass spectrum for 1,2,9-trimethyl-1,2,3,4-tetrahydropicene: m/z 324 (100%), m/z 309 (75%), and m/z 279 (25%), Hazai et al (1986) reported m/z 324 (100%), m/z 309 (95%), and m/z 279 (35%) and Stout (1992) reported m/z 324 (100%), m/z 309 (60%) and m/z 279 (b25%). Our values were: m/z 324 (100%), m/z 309 (83%) and m/z 279 (27%) for compound 3 and m/z 324 (100%), m/z 309 (80%) and m/z 279 (27%) for compound 5.…”

An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland

“…Unidentified compounds with similar mass spectra have been reported with abundant triterpenoids of higher plant origin in Miocene sediments from Baffin Bay off the west coast of Greenland (ten Haven et al, 1992) and in a sub-bituminous coal from the East 310 Elbian coal basin (Hazai et al, 1986). Relative ion peak values for the most abundant 311 monoaromatic diterpenoid observed in this study are 270 100 (Righi et al, 317 2013).…”

Contrasted distributions of triterpene derivatives in the sediments of Lake Caçó reflect paleoenvironmental changes during the last 20,000 yrs in NE Brazil

“…Such compound distributions are very comparable to those described in previous studies, especially on brown coals and lignite (Stout, 1992;Hazai et al, 1986) and are also consistent with the conditions of OM deposition and diagenesis of the considered section, at the end of the Last Glacial Maximum (ca. 18,000 yrs cal BP).…”

“…Surprisingly, the fingerprints of aromatic derivatives in samples taken at 1.6 and 4.7 m depth globally resemble those described by Stout (1992) and Hazai et al (1986) for a lignite and a sub-bituminous coal, respectively. They comprise a series of monoaromatic pentacyclic compounds with various structures and degrees of unsaturation, a series of pentacyclic triaromatics and a series interpreted as diaromatic derivatives of tetracyclic triterpenes.…”

“…Compounds displaying resembling mass spectra have been reported in sub-bituminous coals (Hazai et al, 1986), in Tertiary angiospermous lignite (Stout, 1992) and were identified with synthetic standards (Wolff et al, 1989). According to spectral data and relative retention times, compounds 11, 12 and 13 could be dinor-oleana(ursa)-1,3,5(10),13 (18) ions at m/z 145, 157 and 172, the two additional double bonds cannot be both located on rings B or C since this latter configuration would lead to dominant m/z 221 fragment (Stout, 8 1992).…”

Mutagenicity, dioxin-like activity and bioaccumulation of alkylated picene and chrysene derivatives in a German lignite

“…3c and d), and an isomer of the latter according to the identical mass spectrum, probably with varying positions of the two vicinal methyl groups at ring E. Chaffee and Fookes (1988) published the following mass spectrum for 1,2,9-trimethyl-1,2,3,4-tetrahydropicene: m/z 324 (100%), m/z 309 (75%), and m/z 279 (25%), Hazai et al (1986) reported m/z 324 (100%), m/z 309 (95%), and m/z 279 (35%) and Stout (1992) reported m/z 324 (100%), m/z 309 (60%) and m/z 279 (b25%). Our values were: m/z 324 (100%), m/z 309 (83%) and m/z 279 (27%) for compound 3 and m/z 324 (100%), m/z 309 (80%) and m/z 279 (27%) for compound 5.…”