concentrations in fish sauce treated with chelate resins using the batch and the column method. Data from the column method are present in (A). Data from untreated fish sauce, tannin-treated fish sauce (before chelate resin treat- ment), and CR11- and CR20-treated fish sauce after tannin treatment are shown. Data are presented as the mean ± standard error of three independent samples. Data from the column method are present in (B). Tannin-treated fish sauce was eluted through columns packed with CR11 (d) or CR20 (h) chelate resins, and 10 mL fractions were collected every 2 h. Initial Cd concentrations in fish sauce were 0.33 mg/100 mL. Data are presented as the mean ± standard error of three independent samples.