... : Anthocyanidin,flavonoidsSpecification: Anthocyanidins 10%, 15%, 20%, 25%Assay: HPLCtypical specification of Chinese bilberry extract ---- anthocyanin 25% by UV ITEMSPECIFICATIONDescription:AppearanceOdorParticle sizeBulk DensityExtract SolventsViolet ... . 2000<20%Extract Ratio: Assay:(By UV) Anthocyanidins 20-25:1≥25.0%Microbial:Total bacterial countYeast & MouldBile-tolerant gram-negative. ...