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. 2015 Aug 5;5:12915. doi: 10.1038/srep12915

Figure 1. Phthalocyanine blue (pigment B15:3) is cleaved into BDCN, BCN and HCN upon pyrolysis.

Figure 1

(a) Py–GC/MS chromatogram (1,000 °C) of pigment B15:3. BDCN, BCN, HCN, and 2-butanone represent the main compounds detected. Some tiny amounts of benzene were also detectable at temperatures >800 °C. (b)–(c) Temperature-dependent formation of HCN and benzene during Py–GC/MS analysis of the pigment phthalocyanine blue (pigment B15:3). The values shown represent extracted ion areas of (b) HCN (m/z = 27), (c) benzene (m/z = 78), and (d) 2-butanone (m/z = 72) that have been normalized to the total chromatogram area. Therefore, absolute numbers do not correlate to peak areas of all ion fragments of the molecules included (cf. Fig. 1a). Similar as with BCN and BDCN (data not shown), HCN and benzene formation increases with pyrolysis temperature while levels of 2-butanone did not.