Research Article

Analysis of Some Trace Metals in Fish Species after Preconcentration with Congo Red on Amberlite XAD-7 Resin by Flame Atomic Absorption Spectrometry

Table 2

Total sorption capacity of the metal ions on the Amberlite XAD-7 (amount of resin: 0.5 g, metal ions: 50–800 μg, and pH: 7.5).

MetalCapacity (μg/g) resin

Cu(II)890
Ni(II)720
Fe(III)820
Zn(II)610
Cr(III)530
Cd(II)840
Pb(II)780