Chemical Details

SAMPLE ORIGIN SAMPLE PREP./SIZE PYROL. CONDITIONS TOTAL ION COUNTS

LIGNITE (Miocene)

see ref. 52; 90% organic material; C 51.6%; H 4.6%; 0 32.4%; N 0.6%

Herzogenrath, GFR

suspension in methanol; 25 yg standard not determined

REtdARKS - This lignite spectrum is dominated by phenolic peak series with signals at m/z 124, 138, 150, 164 apparently representing more or less unchanged guaiacylic building blocks (compare with lignin Spectra E.9 and E.10). However, the strong dihydroxybenzene peak at m/z 110 points to the loss of methoxy groups by demethylation. Also the multiple peaks at even mass numbers between the major "lignin" peaks in the high mass range provide evidence for a progressive chemical modification of the original biopolymer matrix. Note the complete absence of typical cellulosic fragments (compare with wood spectrum E.ll) as a result of the more rapid degradation of the polysaccharide moieties of the original wood. Further note the low sulphur signals which confirms the nonmarine origin of this lignite largely composed of redwood remains.

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