Application of photoacoustic infrared spectroscopy in the forensic analysis of artists' inorganic pigments.
Fourier-transform photoacoustic infrared (PAIR) spectroscopy has been used in the analysis of 12 inorganic pigments commonly in use by artists today, viz., cobalt blue, ultramarine blue, Prussian blue, azurite, malachite, chromium oxide, viridian, cadmium yellow, chrome yellow, iron oxide, yellow ochre and Mars orange. The authenticity of these 12 commercial pigments was first established by recording their Raman spectra. The subsequent PAIR spectra were highly reproducible and matched well in the mid-IR region with previously published data for these pigments. A number of additional overtone and combination bands were also detected that will prove useful in the identification of the pigments in the future. The PAIR technique is a promising and reliable method for the analysis of inorganic pigments, especially since it involves much simpler preparation than is required for conventional IR measurements.
von Aderkas
Eleanor L
EL
Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6.
Barsan
Mirela M
MM
Gilson
Denis F R
DF
Butler
Ian S
IS
D000162:Acoustics; D019187:Cadmium Compounds / Q000737:chemistry; D017608:Chromium Compounds / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D003116:Color; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry; D005295:Ferrocyanides / Q000737:chemistry; D044707:Forensic Sciences / Q000379:methods*; D007259:Infrared Rays; D055095:Optics and Photonics / Q000379:methods*; D009942:Organometallic Compounds / Q000737:chemistry; D010150:Paint / Q000032:analysis*; D010151:Paintings; D013055:Spectrophotometry, Infrared / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods; D013440:Sulfides / Q000737:chemistry
D019187:Cadmium Compounds; D017608:Chromium Compounds; D004396:Coloring Agents; D005295:Ferrocyanides; D009942:Organometallic Compounds; D013440:Sulfides; C034939:cadmium sulfide; C520661:malachite; D003035:Cobalt; C000170:ferric ferrocyanide; C023600:chromic oxide