Cation (Ca, Mg, K, Fe, Cu and Zn) concentrations in the digested samples were determined by atomic adsorption spectrophotometry (AAS) with a model 1100 Perkin-Elmer spectrophotometer
Cation (Ca, Mg, K, Fe, Cu and Zn) concentrationsin the digested samples were determined by atomic adsorptionspectrophotometry (AAS) with a model 1100 Perkin-Elmerspectrophotometer