Henrik Schulz* and Anita Horn, Archäomertrie-Labor der HAWK ...
Henrik Schulz* and Anita Horn, Archäomertrie-Labor der HAWK ...
Henrik Schulz* and Anita Horn, Archäomertrie-Labor der HAWK ...
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Manuscript, H. Schulz <strong>and</strong> A. <strong>Horn</strong>, Hildesheim, henrik.schulz@archaeometrielabor.com 8<br />
N<br />
CH 3<br />
(CH3 ) 2N S NH2 #<br />
Figure 3 Change of the ionic form of Toluidine Blue O into the non-ionic imino base<br />
<strong>and</strong> the following transfer of the imino base into n-hexane by extraction<br />
If we dip untreated wood into an imino base extraction of n-hexane the wooden surface<br />
coloured bluish, but the plasma treated wood gets purple. In Figure 4 this displacement of the<br />
wavelength is illustrated for a piece of spruce.<br />
N<br />
CH 3<br />
(CH3 ) 2N S NH2 thionium-salt ammonium-salt<br />
N<br />
CH 3<br />
(CH ) N 3 2 S NH<br />
monomer (imino form)<br />
aqueous, alkaline<br />
extraction of the imino base<br />
(CH 3 ) 2 N<br />
N<br />
!<br />
+ OH<br />
- H2O (CH S<br />
3 ) 2N NH<br />
C<br />
H 3<br />
HN<br />
+ CH3-(CH2 ) 4-CH (n-hexane)<br />
3<br />
CH 3<br />
S NH<br />
slightly yellowish orange, n-hexane extract<br />
N<br />
#<br />
CH 3<br />
S N(CH 3 ) 2<br />
dimer (imino form)