Production of dried tomato products such as finished
products or as an intermediate in the production of
dehydrated products, spice mixtures, or in the manufacture
of dietary supplements based on lycopene have recently
met with great interest of the food manufacturers,
pharmacists and professionals and the general public. An
important indicator of the quality of these products is their
color, which is closely related to keeping the content of
carotene pigment - lycopene. In this work, we investigated
the effect of drying temperature on lycopene content in
dried tomato slices. We tested six varieties of tomato and
drying was performed in a hot air oven at 45 °C, 70 °C and
90 °C.
The highest content of lycopene was found to be at fresh
fruits of variety Šejk F1 302.365 mg 100 g-1 dry matter.
After drying at all observed temperatures there was a
decrease of lycopene content on average of 64.48%
to 68.3%. The highest content of lycopene in dried slices
(115.898 mg 100 g-1 dry matter) was measured at variety
of Kecskemeti dried at 70 °C. Crucial to the quality of the
final products are variety and processing technology, in
particular the temperature at which tomatoes are dried.
Based on the results, temperature of 70 °C was determined
as the most appropriate of the monitored temperatures for
the production of dried tomatoes.
Production of dried tomato products such as finishedproducts or as an intermediate in the production ofdehydrated products, spice mixtures, or in the manufactureof dietary supplements based on lycopene have recentlymet with great interest of the food manufacturers,pharmacists and professionals and the general public. Animportant indicator of the quality of these products is theircolor, which is closely related to keeping the content ofcarotene pigment - lycopene. In this work, we investigatedthe effect of drying temperature on lycopene content indried tomato slices. We tested six varieties of tomato anddrying was performed in a hot air oven at 45 °C, 70 °C and90 °C.The highest content of lycopene was found to be at freshfruits of variety Šejk F1 302.365 mg 100 g-1 dry matter.After drying at all observed temperatures there was adecrease of lycopene content on average of 64.48%to 68.3%. The highest content of lycopene in dried slices(115.898 mg 100 g-1 dry matter) was measured at varietyof Kecskemeti dried at 70 °C. Crucial to the quality of thefinal products are variety and processing technology, inparticular the temperature at which tomatoes are dried.Based on the results, temperature of 70 °C was determinedas the most appropriate of the monitored temperatures forthe production of dried tomatoes.
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