Direct Analysis in Real Time Mass Spectrometry for the Nondestructive Investigation of Conservation Treatments of Cultural Heritage

Figure 2

Total ion chromatogram (intensities of all mass spectral peaks belonging to the same scan) of analyzed samples: from time 230 to 300 seconds an untreated parchment sample was positioned in the helium stream; from time 500 to 550 seconds a piece of parchment treated with castor oil was analyzed; from time 630 to 700 seconds a piece of parchment treated with glycerol was analyzed; from time 780 to 880 seconds a standard of castor oil was inserted in the gap and analyzed; form time 1020 to 1100 seconds a standard of glycerol was positioned in the helium flux and analyzed.