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Table 5 Pyrolytic composition of wooden samples expressed as a relative percentage of total pyrolysis products derived from H-holocellulose and L-Lignin. The H/L ratios are also shown

From: Comparative chemical investigations of alum treated archaeological wood from various museum collections

Reference fresh and archaeological untreated
Sample Ref. pine Ref. maple Ref. birch Arch pine Head post N-124 Sled pull N-17   
H 60.7 59.9 78.5 49.9 22.9 35.7   
L 39.3 40.1 21.5 50.1 77.1 64.3   
H/L 1.5 1.5 3.7 1.0 0.30 0.56   
Dejbjerg, Danish
Sample D-A1624 D-B1624 D-C1628 D-D1626-A core D-D1626-B surf D-E1622-A core D-E1622-B surf D-F1629
H 23.1 11.5 27.2 17.0 11.5 9.3 12.5 18.7
L 76.9 88.5 72.8 83.0 88.5 90.7 87.5 81.3
H/L 0.30 0.13 0.37 0.21 0.13 0.10 0.15 0.23
Oseberg, Norwegian
Sample N-187D N-187L N-207-A core N-207-B surf N-250F N-250K   
H 2.5 2.0 8.9 16.9 43.3 41.0   
L 97.5 98.0 91.1 83.1 56.7 59.0   
H/L 0.03 0.02 0.10 0.20 0.76 0.70   
Glimmingehus, Swedish
Sample S-5T S-125h retreated S-125k S-346 retreated S-346d S-346e S-383 S-383c
H 87.8 53.2 85.5 80.2 46.5 40.2 36.4 23.4
L 12.2 46.8 14.5 19.8 53.5 59.8 63.6 76.6
H/L 7.2 1.2 5.9 4.2 0.9 0.7 0.6 0.3