Characterisation of beech wood and its holocellulose and xylan fractions by pyrolysis-gas chromatography-mass spectrometry

Pouwels, Aloys D.; Tom, A.; Eijkel, Gert B.; Boon, Jaap J.

doi:10.1016/0165-2370(87)85045-3

Cited by 157 publications

(87 citation statements)

References 8 publications

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“…It is concluded that the results in Table 1 Comprehensive qualitative studies of compounds from wood pyrolysis [8,9] include the reported methoxyphenols. Our qualitative results compare well with those reported from analytical pyrolysis of wood of the same spruce and birch species [2].…”

Section: Sampling Methods and Combustion Conditionsmentioning

confidence: 99%

Methoxyphenols from burning of Scandinavian forest plant materials

2000

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Semivolatile compounds in smoke from gram-scale incomplete burning of plant materials were assessed by gas chromatography and mass spectrometry. Gas syringe sampling was shown to be adequate by comparison with adsorbent sampling. Methoxyphenols as well as 1,6-anhydroglucose were released in amounts as large as 10 mg/kg of dry biomass at 90 % combustion efficiency.Wood, twigs, bark and needles from the conifers Norway spruce and Scots pine emitted twelve reported 2-methoxyphenols in similar proportions. Grass, heather and birchwood released the same 2-methoxyphenols but also the corresponding 2,6-dimethoxyphenols which are characteristic of angiosperms. The, methoxyphenols are formed from lignin and 4iffer in structure by the group in para position relative to the phenolic OH group. Prominent phenols were those with trans-1-propenyl and ethenyl groups in that position. Vanillin, 4-hydroxy-3-methoxybenzaldehyde, was a prominent carbonyl compound from the conifer materials.

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Section: Sampling Methods and Combustion Conditionsmentioning

confidence: 99%

Methoxyphenols from burning of Scandinavian forest plant materials

2000

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“…It also provides a direct method of detecting several di¡erent macromolecules in a single analysis (i.e. the Class Ic resin itself (Anderson et al 1992;Anderson 1995), lignin, polysaccharide, chitin and amino acids) based on identi¢cation of unique pyrolysis products (Pouwels et al 1987;Hatcher et al 1988;Anderson 1995;van Bergen et al 1995;Stankiewicz et al 1996Stankiewicz et al , 1997d.…”

Section: Introductionmentioning

confidence: 99%

Chemical preservation of plants and insects in natural resins

Stankiewicz

Poinar²,

Briggs

et al. 1998

Proc. R. Soc. Lond. B

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The morphological preservation of fossils in amber is remarkable, but their chemical composition is largely unknown. The likelihood of DNA preservation in amber has been questioned but, surprisingly, the fate of more decay-resistant macromolecules such as ligno-cellulose in plants or the chitin^protein complex in insect cuticle has not been investigated. Here we report the results of investigations using pyrolysis-gas chromatography/mass spectrometry (py-GC/MS) of the tissues of insects and the plant Hymenaea from ancient and sub-fossil resins (2^20 ka) from Kenya, and from Dominican amber (25^30 Ma). The volatile components of the resin have penetrated even the internal tissues, resulting in the exceptional three-dimensional preservation of amber inclusions. Chitin is preserved in the bee and ligno-cellulose in the Hymenaea leaf from the Kenyan resins. There was no trace, however, of these macromolecules in tissues in Dominican amber. The presence of aliphatic polymer and sulphur-containing moieties in these tissues indicates that they have undergone diagenetic alteration; in view of this, the preservation in Dominican amber of a macromolecule as labile as DNA would be extraordinary.

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“…The identification of the pyrolysis products has been carried out using the NIST mass spectral library as well as the chromatographic retention data and mass spectra collection of Faix and coworkers [53][54][55][56]. For the identification of a few additional compounds some other papers have been used [57][58][59][60][61][62]. Table 3.3 lists the major products together with the most important mass spectrometric ions and molecular mass.…”

Section: Pyrolysis Of Macromolecular Biomass Constituentsmentioning

confidence: 99%