... %, 15%, 20%, 25%, 30%, 40%, 50%, 60%, 65%, 70%, 75%, 80%, 90% HPLC 3. EGCG 10%, 15%, 20%, 30%, 35%, 40%, 45 ... < 20ppmArsenic(As)< 2ppmLead(Pb)< 2ppmAssayPolyphenols by UV> 95.0%Catechins by HPLC> 70.0%EGCG by HPLC> 40.0%Caffeine by HPLC< 5.0%Total Plate Count ... .NegativeSalmonellaNegative c. Equipped with the most advanced extraction unit, and HPLC,UV,GC,AA. We are also in cooperation with many ...