Comparative study of three digestion methods for elemental
· The results obtained from all experiments indicated that method C which represented the mixture of HNO 3 HCl had given the highest analyte recovery for As Cd Pb Ni Zn and Fe in TM samples Method A using the HNO 3 HClO 4 mixture and method B using HNO 3 only gave convergent recoveries for all elements The mean values of As Cd Pb Ni