Change of anthocyanins content during production of jam from different species of fruit

Stamatovska, Viktorija and Nakov, Gjore and Karakasova, Ljubica and Babanovska- Milenkovska, Frosina and Kalevska, Tatjana and Jankuloska, Vezirka (2018) Change of anthocyanins content during production of jam from different species of fruit. International CONGRESS of Food Technologists, Biotechnologists and Nutritionists. pp. 17-21.

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Anthocyanins represent soluble pigments. From them comes the red, blue and purple color of fruit.
Anthocyanins are very easily degraded by heat treatment, which can have a major impact on the color
quality and nutritional characteristics of the finished product. In order to determine how the heat
treatment affects the content of the anthocyanins, jams were produced from peach and two varieties of
raspberry. The jams were produced by boiling the prepared fruits, in open stainless steel vats on direct
fire, under atmospheric pressure, temperature of ≈ 100 °C, for a period of 15 minutes. As sweeteners
were used: sucrose, fructose, sorbitol and agave syrup. The analysis of anthocyanins was carried out
on fresh fruits and obtained jams (spectrophotometrically at pH differential method with UV-Vis
spectrophotometer). The research was repeated three times, for a period of three years.
The values obtained for the average content of anthocyanins in jams (8.49 - 27.96 mg CGE/100 g FW)
are lower compared to the established values in fresh fruits (18.45 - 108.43 mg CGE/100 g FW).
Based on the results obtained, it can be concluded that with this method of heat treatment of the fruit
(high temperature, presence of oxygen and light) part of the anthocyanins present in the fruits are lost
during the processing. The obtained jams still possess the required quality in accordance with the
Keywords: anthocyanins; peach; raspberry; jams;

Item Type: Article
Subjects: Scientific Fields (Frascati) > Engineering and Technology > Other engineering and technologies
Divisions: Faculty of Technology and Technical Sciences
Depositing User: Mr Jordan Martinovski
Date Deposited: 02 Sep 2023 06:04
Last Modified: 02 Sep 2023 06:04

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