Figure 8
Chromatogram of sample 4 (archeological birch bark, waterlogged site) after hydrolysis. I.S.1: internal standard hexadecane, I.S.2: internal standard tridecanoic acid and *instrument contamination.
Figure 8 | Heritage Science
Chromatogram of sample 4 (archeological birch bark, waterlogged site) after hydrolysis. I.S.1: internal standard hexadecane, I.S.2: internal standard tridecanoic acid and *instrument contamination.