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Composition of tomatoes and tomato products in antioxidants (WG1) page 78
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2,5
1,5
0,5
Peak area ratio/
b-apo-8 ’-carotenal
2
1
0
1 2 3 4
Method number
b-Carotene
Lycopne
Fig 17. Recovery of tomato carotenoids using different extraction phases.
(method numbers in the figure correspond to numbers in table 26)
However β-carotene was extracted with the same yield whatever methods was used.
The effectiveness of different solvents in the extraction of carotenoids was tested on tomato
soup (Scott 1992). With the dried material, alcohols were more effective than THF, acetone
and hexane. When the tomato soup was dispersed in water, the combination of THF and
methanol was found to result in efficient extraction. This mixture was proposed as a first step
of extraction of a reference material (vegetable powder) during a certification study financed
by the European community (MAT-CT 93-0022) undertaken by J.Scott, R.Seale and
P.M.Finglas. The extraction was achieved by addition of petroleum ether and methylene
chloride.