3-sambubioside or hibiscin) and cyanidin 3-xylosylglucoside (also
called cyanidin 3-sambubioside or gossypicyanin).
Concentration of anthocyanins (or other polyphenols), using
membrane technologies, is of interest because the low temperatures
involved imply that thermal degradation of these compounds can be
avoided. Moreover, fractionation and the subsequent purification and
concentration of anthocyanins are a matter of health and, consequently,
of economic interest to the food industry. If functional food is
defined as including ingredients with additional health value, then the
global market for these products in 2000 was at least US$33 billion The commercial development
of natural antioxidants from plant sources for nutritional
purposes has since been increasing steadily Ultrafiltration (UF) and nanofiltration (NF) are pressure-driven
membrane processes. Their properties are intermediate between
those of microfiltration and those of reverse osmosis. Ultrafiltration is
widely used to clarify various juices