Two scientific publications report on improved methods for determining the amounts of flavanol antioxidants in cocoa and chocolate. The research, sponsored by The Hershey Center for Health and Nutrition, was a collaboration between scientists at The Hershey Company and other scientific laboratories.
Scientists at Planta Analytica (Danbury, CT) isolated and separated cocoa flavanol antioxidants on a large scale. The Hershey scientists and collaborating scientists at the Pennsylvania State University-M.S. Hershey Medical Center (Hershey, PA) teamed up to determine the purity of these flavanols by HPLC and by Matrix Assisted Laser Desorption Ionization Time of Flight (MALDI-TOF) mass spectroscopy. The isolated compounds were then used as standards in the determination of flavanol cocoa antioxidants in a cocoa powder and a dark chocolate.
"We believe this represents the first large scale purification of standards for flavanol antioxidant determination" said Dr. Jeffrey Hurst of the Hershey Center for Health and Nutrition. "Prior to this, only dimers were commercially available. With a full series of standards, our flavanol determinations are not only more accurate, but the values are much higher, between 40% to 100% higher, than previously published methods using proprietary standards." This also means that standards are commercially available to various laboratories. This collaborative work was published in the online journal
In other research published in the Journal Association of Official Analytical Chemists, scientists from The Hershey Company and Brunswick Laboratories (Newton, MA) reported on the development of a new method for determining total procyanidins. This method is a colorimetric test based on the specific reaction of dimethylaminocinnamaldehyde (DMAC) with flavanols. The method measures flavanol monomers, including EGCG, as well as higher flavanol polymers. The method which is standardized using a commerciall
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