Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Luminița CATANĂ, Monica CATANĂ, Enuța IORGA, Adrian Constantin ASĂNICĂ, Anda-Grațiela LAZĂR, Monica-Alexandra LAZĂR, Nastasia BELC
There are scientific evidences that a diet rich in fruits and vegetables may reduce the risk to have different chronic diseases. Berries are recommended in a healthy diet as it provides protection against degenerative diseases, cardiovascular diseases and cancer. Fruits of Aronia melanocarpa are rich sources of biologically active compounds, polyphenols (anthocyanins and procyanidins, especially) representing the most important group. Polyphenols are the main substances which give the antioxidant potential of black chokeberry fruits. In this paper are presented results of the performed research for determination of vitamin C and total polyphenol content and antioxidant capacity in case of fresh and processed fruits of Aronia melanocarpa (frozen and dried fruits, juice, jam, compote). Determination of vitamin C was performed by high performance liquid chromatography coupled with high resolution mass spectrometry, using hippuric acid as internal standard. Total polyphenol content was spectrophotometric determined, using Folin-Ciocalteu method, and assessment of the antioxidant capacity was performed using DPPH method. Vitamin C content of the samples taken into study varied in the range 7.25–98.75 mg/100g (minimum value was recorded for jam, and maximum one for fresh, unpasteurized juice). Dried fruits of Aronia registered the highest total polyphenol content (4015.25 mg GAE/100g) and antioxidant capacity (84.45mg Trolox Equivalents/g). Minimum value of antioxidant capacity was recorded for compote of Aronia, 12.25 mg Trolox Equivalents/g, respectively. Taken into consideration that fresh fruits of Aronia are available only a short time period, their processing under diverse forms is of real interest for consumers which can benefit thus of nutritional qualities and antioxidant potential of them.
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