Rapid and Simultaneous Prediction of Eight Diesel Quality Parameters through ATR-FTIR Analysis

Table 3

Infrared vibrational groups of the diesel samples [42, 43].

Attribution	Wavenumber (cm^−1)
CH3 asymmetrical stretch	2953
CH3 symmetric stretch	2870
CH3 angular deformation	1379
CH2 asymmetric stretch	2922
CH2 symmetrical stretch	2853
CH2 angular deformation	1464
CO2 asymmetrical stretch	2350
CO2 angular deformation	667
C=O carbonyl stretch	1750–1735
C–O stretch (aliphatic ester)	1300–1000
C=C stretch (alkenes)	1660–1600
C=C stretch (aromatic)	1600 and 1475
=C–H stretch (aromatic)	900–690
S–H stretch	2600–2550
C–S stretch	700–600