Fig. 2A shows the influence of NaCl concentrations on the removal of Cd from model samples using chelate resins (CR11,
CR20) with the batch method. Because fish sauce contains NaCl at 18–23 g/100 mL (Park et al., 2001), reference samples contained NaCl in the range of 0–25 g/100 mL. After treatment with CR11, Cd concentrations in these standards increased with NaCl concentrations from 0.20 ± 0.050 to 1.7 ± 0.005 mg/100 mL. Because Na+ is