. 2019 Oct 2;9:14138. doi: 10.1038/s41598-019-50740-w

Table 1.

Main Raman bands identified for the colored plastics analysed. The possible compounds present are indicated according to the cited references.

Colour	Raman bands (cm⁻¹)	Possible compound	Reference
White	446, 603	TiO2 rutile	www.RRUFF.info
Red	143, 198, 396, 515, 639, 721	TiO2 anatase	IRUG Spectral Database www.irug.org (Price & Pretzel, 2000)
Yellow	143, 446, 603, 724, 1003, 1251, 1400, 1528, 1595	Diarylide Yellow, Azo Dye + TiO2 + Titanox	IRUG Spectral Database www.irug.org (Price & Pretzel, 2000)
Black	1303, 1598	Carbon black	(Boccaleri et al., 2006)
Green	104, 202, 293, 515, 548, 646, 697, 709, 743, 779, 820, 959, 982, 1085, 1143, 1215, 1284, 1340, 1392, 1509, 1540	PG - Green Pigment Cu-Phthalocyanine	IRUG Spectral Database www.irug.org (Price & Pretzel, 2000)