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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)