Analytical characterisation of the seeds of two tomato varieties as a basis for recycling of waste materials in the food industry

The tomato processing industry generates annually high amounts of waste. In respect of a possible recycling of these materials, the seeds of the two tomato varieties Waltinger and Red Currant were analysed. Contents of carotenoids and vitamin E were determined by HPLC. The antioxidant capacity was a...

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Bibliographic Details
Published in:European food research & technology 2014-10, Vol.239 (4), p.613-620
Main Authors: Westphal, Anna, Bauerfeind, Jasmin, Rohrer, Carsten, Ernawita, Böhm, Volker
Format: Article
Language:English
Subjects:
Agriculture
Analytical Chemistry
antioxidant activity
Antioxidants
Biotechnology
Carotenoids
Chemistry
Chemistry and Materials Science
Chromatography
cooking fats and oils
Edible oils
Ethanol
fatty acid composition
Fatty acids
Food
food industry
Food processing industry
Food Science
Forestry
gamma-tocopherol
Gas chromatography
high performance liquid chromatography
linoleic acid
Liquid chromatography
new products
oilseeds
Original Paper
Proteins
raw materials
Recycling
Seeds
Tomatoes
Vitamin E
Vitamins
Waste management
Waste materials
Waste recycling
wastes
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Summary:The tomato processing industry generates annually high amounts of waste. In respect of a possible recycling of these materials, the seeds of the two tomato varieties Waltinger and Red Currant were analysed. Contents of carotenoids and vitamin E were determined by HPLC. The antioxidant capacity was analysed by several assays (Folin–Ciocalteu, TEAC, ORAC), whereby hydrophilic and lipophilic compounds were gathered separately. The fatty acid profile was determined by gas chromatography. The seeds contained only little amounts of (all-E)-lutein and (all-E)-zeaxanthin. Vitamin E content of Waltinger seeds was nearly twice as high as that of Red Currant seeds with γ-tocopherol as the main vitamer. Red Currant seeds showed always higher antioxidant capacity. Hydrophilic extracts contributed mainly to the total antioxidant capacity. The oil of the seeds was rich in unsaturated fatty acids, especially in linoleic acid. Finally, the results showed that tomato seeds contain some important substances. So concerning waste management, they can serve as a secondary raw material for new products such as edible oil.
ISSN:1438-2377
1438-2385
DOI:10.1007/s00217-014-2257-1