Fig. 2. The influence of NaCl and amino acids on Cd removal from reference samples using chelate resin. Data from NaCl are presented in (A). Aqueous solutions containing NaCl at 0–25 g/100 mL and Cd at 2.0 mg/100 mL in phosphate buffer (pH6) were used as reference samples, and were treated with CR11 (d) or CR20 (h) chelate resins using the batch method. Data are presented as the mean ± standard error of three independent samples. Data from amino acids are presented in (B). Aqueous solutions containing amino acids at 0–10,000 mg /100 mL and Cd at 2.0 mg/100 mL in phosphate buffer (pH 6) were used as reference samples and were treated with CR11 (d) or CR20 (h) chelate resins using the batch method. Data are presented as the mean ± standard error of three independent samples.