Figure 3
Materials identified in the different sections of the Ansaldo A.1 Balilla; (a): Py-GC–MS chromatogram obtained for a sample containing both silk and the dope layer; (b) Py-GC–MS chromatogram obtained for a paint sample with hexamethyldisilazane as derivatizing agent; (c) Extracted ion chromatograms obtained for the dichloromethane extract of a paint sample from the “Saint George and the dragon” painting; the triacylglycerols were detected as sodium adducts ([M + Na]+); Acyl substituents abbreviation list: M: myristyl (C14); P: palmityl (C16); L: linoleyl (C18:2); O: oleyl (C18:1); S: stearyl (C18); For the oxidized acyl substituents: Cx:y,zOH with x: n° of carbon atoms, y n° of unsaturation, and z n° of hydroxy groups.
