Fig. 3.

Representative ATR FTIR spectral traces (from 1800 to 700 cm^–1) of AIR sourced from Cabernet Sauvignon (A) and Crimson Seedless (B) berries at green, véraison and ripe phases. Assignments are based on the literature, specifically Kacurakova et al. (2000), Stephen et al. (2006) and Szymanska-Chargot and Zdunek (2013). (C) Combined PCA score plot for discrimination of ripening stages in Cabernet Sauvignon and Crimson Seedless (in this case three samples per stage per cultivar are shown). Cabernet Sauvignon samples are represented as circles and Crimson Seedless samples as squares.