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Table 4 Additives used during or/and after alum treatment determined by Py-GC/MS

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

Collection Sample Linseed oil Glycerol PEG
Dejbjerg D-A1624
D-B1624
D-C1628
D-D1626-A
D-D1626-B
D-E1622-A
D-E1622-B
D-F1629
Oseberg N-187d +*
N-187l +*
N-207A +
N-207B +
N-250F
N-250K
Glimmingehus S-5T + +*
S-125ha +* +* +
S-125k +* +*
S-346a + +
S-346d +* +*
S-346e +* +*
S-383 + +
S-383c  +  +
  1. An asterisk (*) indicates deviation from the information obtained from treatment records, which is presented in Table 1
  2. aSamples re-treated with PEG 2000 between 2005 and 2009. Glycerol was found in retreated S-125h likely because it was not completely washed out (some objects were packed in foam during desalination)