The forensic analysis of office paper using carbon isotope ratio mass spectrometry. Part 3: Characterizing the source materials and the effect of production.

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Presentation transcript:

The forensic analysis of office paper using carbon isotope ratio mass spectrometry. Part 3: Characterizing the source materials and the effect of production and usage on the δ13C values of paper Kylie Jones, Sarah Benson, Claude Roux Forensic Science International Volume 233, Issue 1, Pages 355-364 (December 2013) DOI: 10.1016/j.forsciint.2013.10.011 Copyright © 2013 Terms and Conditions

Fig. 1 Mean δ13C values of cellulose extracted from samples collected throughout the paper production process (error bars not included as they are negligible at this scale). Forensic Science International 2013 233, 355-364DOI: (10.1016/j.forsciint.2013.10.011) Copyright © 2013 Terms and Conditions

Fig. 2 Mean δ13C values of extracted cellulose (diamond markers) compared with bulk values (square markers) collected from throughout the paper production process (error bars not included as they are negligible at this scale). Forensic Science International 2013 233, 355-364DOI: (10.1016/j.forsciint.2013.10.011) Copyright © 2013 Terms and Conditions

Fig. 3 Mean δ13C values of bulk paper (diamond markers) compared with the same paper samples after undergoing acidification (square markers). Forensic Science International 2013 233, 355-364DOI: (10.1016/j.forsciint.2013.10.011) Copyright © 2013 Terms and Conditions

Fig. 4 Comparison of the mean δ13CVPDB values of papers before and after printing using toner. Error bars represent 0.5‰ either side of the measured value. Forensic Science International 2013 233, 355-364DOI: (10.1016/j.forsciint.2013.10.011) Copyright © 2013 Terms and Conditions

Fig. 5 Comparison of the δ13CVPDB values of papers before and after printing using inkjet ink. Error bars represent 0.5‰ either side of the measured value. Forensic Science International 2013 233, 355-364DOI: (10.1016/j.forsciint.2013.10.011) Copyright © 2013 Terms and Conditions