We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Thermofractography of Lignins and Its Use for Rapid Analysis on the Ultra Micro-Scale.
- Authors
Stahl, E.; Karig, F.; Brögmann, U.; Nimz, H.; Becker, H.
- Abstract
Thermofractography has proved to be a convenient method for the classification of lignins. The sample is heated in a pyrolysator glass cartridge at linearly increasing temperatures and the evolved thermolysis products are carried by nitrogen onto a TLC-plate, which moves slowly with its starting line near the outlet of the tube. The TLC-plate is then developed under standard Chromatographic conditions and gives a characteristic finger print diagram (cf. Figs, and 2). Softwood lignins (spruce and pine) give only guaiacyl derivatives which are obtained from all lignins and therefore are typical lignin finger print substances. Hardwood lignins (beech and poplar) give in addition syringyl derivatives and are thus easily distinguished from softwood lignins. The thermofractographic method is of special interest for the analysis of lignins from herbaceous angiosperms, ferns, mistletoes and other plants with an unknown type of lignin. Thus, in the case of two mistletoes from pine and poplar, it is shown that their lignins both belong to the guaiacyl-syringyl (hardwood) type.
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 1973, Vol 27, Issue 3, p89
- ISSN
0018-3830
- Publication type
Article