Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants: Effect of mineral addition

TEIXEIRA ALINE; NAVARRO ALBA; MOLINA GARCIA ANTONIO; MARTINO M. NORA; DELADINO LORENA

FOOD AND BIOPRODUCTS PROCESSING

INST CHEMICAL ENGINEERS

Año: 2015 vol. 94 p. 39 - 49

0960-3085

Corn starch is considered a good vehicle for delivering bioactive compounds such as sup-plements or health promoting additives. The ability of starch treated by high hydrostaticpressure (HHP) to bind and carry zinc and magnesium salts and natural antioxidants ofyerba mate (Ilex paraguariensis) extracts was tested. A uniform distribution of the miner-als on the surface of starch granules was observed by SEM?EDX and significantly higheramounts of minerals were loaded by HHP treated starches. Calorimetric analysis showedthe effect of both HHP treatment and the active compounds addition, while crystal frac-tion was determined by X-ray diffraction, denoting the presence of minerals in the starchgranule. It was found that the type of starch carrier did not affect total polyphenol load-ing. Besides, HPLC analysis showed that the relative composition of polyphenols from yerbamate extract was maintained. These results support the use of HHP treated corn starch asan alternative carrier for molecules of nutritional interest into food systems.