National Institute of Standards and Technology (NIST) researchers have developed new certified reference materials for measuring amounts of organic acids in dietary supplements formulated with Vaccinium berries - cranberries, blueberries and bilberries. As described in a recent paper, manufacturers and researchers can use this new suite of standard reference materialsTM (SRMs) as quality assurance tools. berry SRMs
http://www.medicalnewstoday.com/articles/207565.php
http://www.medicalnewstoday.com/articles/207565.php