EFFECTS OF TECHNOLOGICAL OPERATIONS AND STORAGE CONDITIONS ON COLOUR AND CAROTENOIDS CONTENT OF TOMATO POWDER

Authors:	L. Sandei, C. Leoni, A. Cabassi
Keywords:	lycopene, colour, tomato powder
Abstract: The results are reported of trials designed to evaluate the effect of industrial production of tomato powders on: antioxidant carotenoids content; occurrence of a correlation of lycopene and -carotene contents with some storage indicators (duration, temperature, light, type of package); occurrence of a correlation of Gardner Colour measurement of tomato powder between their lycopene content. The trials showed a moderate decrease (5%) of lycopene content and Gardner colour (parameters L, a, b) during the various steps of tomato-powder industrial production; a strong influence during storage of the package on lycopene and colour (in particular a higher decrease in lycopene content and colour were found when oxygen concentration in the package was particularly high in the first storage month); no significant effects of light and temperature on the stored powder. Finally, a good correlation (R = 0,93) was found between lycopene content and a/b parameter of Gardner colour determined on the powder reconstituted in water to a concentration of 12.5°Brix.
Full Text (PDF format, 42808 bytes) Citation Download Adobe Acrobat Reader (free software to read PDF files)