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

Figure 3

(a) Mass spectrum of untreated parchment, (b) mass spectrum of parchment treated with castor oil, (c) mass spectrum of parchment treated with glycerol with the signal at 93.049 (protonated: M+H+) and 185.063 (dimeric ions: M+M+H+), (d) mass spectrum of castor oil standard, and (e) mass spectrum of glycerol standard.

(a)

(b)

(c)

(d)

(e)