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

Figure 3

The influence of flow rates of eluent solution on the recoveries of the analyte ions with CR on Amberlite XAD-7 (pH = 7.5; amount of metal ions: 30 μg Pb(II) and Cr(III), 20 μg Fe(III), 15 μg Cu(II) and Ni(II), and 10 μg Cd(II) and Zn(II); CR amount: 1.0 mmol/L; amount of resin: 0.5 g; final volume: 5 mL and ).