. Freeze-dried tomato samples
were extracted with hexane:acetone (7:3) (0.5 g/25 ml), and total
carotenoids were quantified with colorimetric detection at 450 nm
using UV–vis spectrophotometer (JENWAY 6305, UK) and β-carotene
2 K.G.L.R. Jayathunge et al. / Innovative Food Science and Emerging Technologies 32 (2015) 1–8
as a standard (0.5–10 μg/ml). Lycopene content was determined colorimetrically
(472 nm) using the method described by Sadler, Davis
and Dezman (1990) after hexane:ethanol:acetone (2:1:1) extraction