Figure 6 | Scientific Reports

Figure 6

From: Identification and tentative removal of collagen glue in Palaeolithic worked bone objects: implications for ZooMS and radiocarbon dating

Figure 6

ZooMS spectra for samples MUSE21164 (top green spectra) and MUSE21169 (bottom blue spectra) after undergoing (A) standard acid extraction and (B) the radiocarbon cleaning protocol to try to remove the contaminating consolidant. Peak labels in red with * indicate cattle markers while those in black are whale markers. Fewer cattle markers can be identified after the radiocarbon cleaning method 2 + ABA for both samples (inset B), and the cattle markers that are present are significantly reduced in comparison to the whale markers. However, the presence of cattle markers means that not all glue has been removed and this contamination is problematic for radiocarbon dating these samples. Intensity has been normalised for comparative purposes.

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