Forensic Applications of Gas Chromatography - Forensic Applications of Gas Chromatography - page 128

Table 8.7 Diagnostic FTIR Peaks Associated with Some Inorganic
Pigments/Extenders Used in Paints a
Pigment/Extender Associated FTIR Bands

Oxides

Iron oxide, red 350-310, 480-440, 560-530 cm -1

Iron oxide, yellow 278, 405, 606, 797, 899 cm -1

Lead oxide 450, 530 cm -1

Zinc oxide 500-420 cm -1

Silicon dioxide (quartz) 373, 397, 460, 512, 779, 798, 1081 cm -1

Titanium dioxide (rutile) 340, 410, 600 cm -1

Titanium dioxide (anatase) 340, 600 cm -1

Carbonates

Calcium carbonate
(arogonite)

317, 712, 857, 870, 1445-1390 cm -1

Calcium carbonate (calcite) 317, 712, 870, 1390-1445 cm -1

Silicates

Magnesium silicate (talc) 345, 390, 420, 450, 465, 670, 1015 cm -1

Aluminium silicate (kaolinite) 280, 350, 430, 470, 540, 910, 940, 1005, 1035 cm -1

a Courtesy of Dr Brian Singer, Northumbria University.

90

80

70

60

50

40

3500 3000 2500

Wavenumber cm -1

2000 1500 1000 500

Figure 8.36 FTIR spectrum of a green paint.