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Table 2 Shifts in absorption and emission bands of the liquid sample, cured film, ethanol extract and the oil film after ethanol extraction, as well as the two purified HPLC fractions in methanol

From: Insights into the yellowing of drying oils using fluorescence spectroscopy

 Absorption band maximum; λex (nm)Emission band maximum; λem (nm)Stokes shift; ∆(nm)
Liquid207
236
283
300329, 41229, 112
31541297
Cured oil film300445 → 550*145 → 250*
Ethanol extract from cured oil318418100
Cured oil film after ethanol extraction445
Fraction 1232
27531540
Fraction 227531540
  1. * Fluorescence of cured oil changes upon ageing; discussed in  “Artificial ageing” section