The dry ashing was done using the Uniscope muffle furnace (model SM 9080, Surgifriend Medicals, England). A Buck Scientific Atomic Absorption Spectrophotometer (210 VGP model, East Norwalk, Connecticut, USA) was used for determination of the metals.
The dry ashing was done using the Uniscope muffle furnace(model SM 9080, Surgifriend Medicals, England). A Buck ScientificAtomic Absorption Spectrophotometer (210 VGP model, EastNorwalk, Connecticut, USA) was used for determination of themetals.