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Ph-Wert, Pufferkapazität und Gehalt an flüchtigen Säuren der Extrakte des Kern- und Splintholzes der Lärche

 
: Roffael, E.; Dix, B.; Lee, T.W.; Miertzsch, H.

Holz als Roh- und Werkstoff 52 (1994), pp.324
ISSN: 0018-3768
German
Journal Article
Fraunhofer WKI ()
buffering capacity; content of acetic ans formic acid; extractive; heartwood; larch; pH-value; sapwood

Abstract
Investigations carried out on the pH-value and buffering capacity of extractives from hartand sapwood of larch led to the following results: Heartwood extractives show a lower pH-value and higher buffering capacity compared to sapwood extractives. Heartwood of the 102-year old trees show the lowest pH-value and the highest buffering capacity. The ions of acetic and formic acid, as determined in the extractives by ionic chromatography, show that heartwood extractives contain more acetate ions than sapwood extractives. Moreover, the amount of acetate ions in heartwood extractives increases with the age of the tree.

: http://publica.fraunhofer.de/documents/PX-28314.html