Green Tea Extract Powder Specification:Polyphenols 20%-98% EGCG 10%-95%,Catechins 10%-90% ... %, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 98% UV 2. Catechins 10%, 15%, 20%, 25%, 30%, 40%, 50%, ... %Heavy Metals< 20ppmArsenic(As)< 2ppmLead(Pb)< 2ppmAssayPolyphenols by UV> 95.0%Catechins by HPLC> 70.0%EGCG by ... with the most advanced extraction unit, and HPLC,UV,GC,AA. We are also in cooperation with many ...