Microanalytical Characterization of an Innovative Modern Mural Painting Technique by GC-MS

“Mass spectra were acquired using an Agilent 7890B gas chromatograph (Agilent Technologies, Santa Clara, CA, USA) equipped with capillary column HP-5ms cross-linked (5%-phenyl)-methylpolysiloxane (30 m × 0.25 mm × 0.25 μm) and an Agilent 5977A mass spectrometer (Agilent Technologies, Santa Clara, CA, USA) operated in positive mode with electron impact ionization (70 eV). The injector was set at 280 °C and the interface at 310 °C. The initial temperature for the GC column was 40 °C, held for 1 min, increased at 8 °C min−1 to 310 °C, held for 10.25 min. The helium flow rate was 1 mL min−1. The mass range of the mass spectrometer was 30–600 m/z and mass fragments were identified by their respective spectra through NIST v. 14 mass library searches.”

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