I am direct representative of the refinery.
Sum of metallic impurities in Isotope 184 W Lot #26 is no more than 0.0023/owt. The purity grade of Isotope 184W Lot #26 is 99.998 % wt. It was calculated as difference between 100 % and Sum of metallic Impurities according order of Customec The purity grade is based upon total metallic impurities (metals basis) accordance Alfa Aesar (Thermo Fisher Scientific) Sigma-Aldrich (Merck) corresponds on Customer order.