Antioxidants play a vital role in the human body by defending
cells
from damage caused by free radicals, highly reactive products of oxidation
reactions. A major source of antioxidants is fruits and vegetables.
Aronia mitschurinii
, a breed created at the end of
the 19th century by crossbreeding wild
Aronia melanocarpa
and Russian Mountain Ash, produces fruits with one of the highest
known content of hydrophilic antioxidants. Aronia fruit contains a
potent blend of anthocyanins, polyphenols, and flavonoids. The most
popular way of consuming the fruit is through juicing. Yet, due to
very high concentrations of tannins in the juice, very few food-related
applications have been developed. Resin extraction of antioxidants
provides an alternative for utilizing valuable phytochemicals from
crops for applications in the food industry as nutraceutical supplements
and more. To increase the market value of the plant, it is important
to determine what resins can extract the optimum concentration of
antioxidants from aronia juice, pulp, and whole berries. We have shown
that macroporous resins such as Amberlite XAD 1180N, Amberlite XAD
7HP, Amberlite XAD 761, and Amberlite FPX66, which have been reported
to be effective in extracting the anthocyanins and polyphenols from
other fruit juices, skins of red grapes, and the wild breed, are also
effective for use in juice, pulp, and whole fruits of
Aronia mitchurinii
. However, the extremely high content
of antioxidants presents a challenge to obtaining high recovery; a
notable change in the juice/resin ratio is required to obtain a higher
recovery value. Our results showed that Amberlite FPX66 was the best
at extracting anthocyanins, polyphenols, and flavonoids from aronia
juice. A separate experiment conducted to determine how to optimize
the efficiency of FPX66 extraction revealed that increasing the resin/juice
ratio increased the percent recovery of anthocyanins from aronia juice.
Moreover, we have compared recovery between juice, pulp, and whole
aronia berries and batch versus column extraction.