Cd forms in fish sauce were identified using gel filtration chromatography according to the method of Takeuchi, Inari, and
Morimoto (2001) with some modifications. Untreated fish sauce,tannin-treated fish sauce, CR11-treated fish sauce, and standard solution were compared. CR11-treated fish sauce was prepared using the batch method. Standard solutions were prepared by dissolving 100 mg of human albumin (Wako Pure Chemical Industries Ltd., Tokyo, Japan), 100 mg of alanine (Wako Pure Chemical Industries Ltd.), and 100 lL of 1000-ppm Cd standard solution in 10 mL of distilled water.