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1 January 2016 X-ray Densitometry of Norway Spruce Subfossil Wood From the Austrian Alps
Marzena Kłusek, Michael Grabner
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The processing of subfossil wood poses some difficulties in densitometric research. Problems arise because of the physiochemical changes of wood occurring in the sedimentation environment. Subfossil wood modification can result from the uptake of mineral and organic substances into the wood tissue. It can also occur as the effect of microbiological degradation of wood. The goal of this study was to identify the appropriate method of subfossil wood preparation for the densitometric research. For this purpose the wood of Norway spruce from Lake Schwarzensee was subjected to extraction in de-ionized water, acetone and diluted acetic acid. The application of acetic acid did not significantly influence the density of the wood and acetone seemed to be too aggressive. The best result was obtained by rinsing the samples in cold de-ionized water. This extraction procedure allowed removal of unwanted water-soluble, organic and inorganic compounds from wood and simultaneously did not lead to the degradation of subfossil samples.

Copyright © 2016 by The Tree-Ring Society
Marzena Kłusek and Michael Grabner "X-ray Densitometry of Norway Spruce Subfossil Wood From the Austrian Alps," Tree-Ring Research 72(1), 23-34, (1 January 2016).
Received: 11 October 2014; Accepted: 1 November 2015; Published: 1 January 2016

Norway spruce
sample extraction
subfossil wood
tree-ring densitometry
Wood density
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