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. 2013 Sep 6;13(9):11899–11912. doi: 10.3390/s130911899

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — Comparison of BAD and Control Mass Spectra at similar Retention Times. (a) These spectra show similar mass ion ratios at 43 and 58, indicating the groups of Acetone. (b) These have similar mass ion peaks at and around 45, potentially indicating an alcohol as a common root. However, BAD yields much higher concentration, and there are extra mass ion peaks present in controls. (c) These have similar mass ion ratios for most significant peaks (42, 55, 41, etc.), indicating a common root. (d) This shows a unique set of mass ion ratios not found in controls, with a peak at 59 indicating an amide.

Figure 6. — Comparison of BAD and Control Mass Spectra at similar Retention Times. (a) These spectra show similar mass ion ratios at 43 and 58, indicating the groups of Acetone. (b) These have similar mass ion peaks at and around 45, potentially indicating an alcohol as a common root. However, BAD yields much higher concentration, and there are extra mass ion peaks present in controls. (c) These have similar mass ion ratios for most significant peaks (42, 55, 41, etc.), indicating a common root. (d) This shows a unique set of mass ion ratios not found in controls, with a peak at 59 indicating an amide.