... H2SO4, 5 ml Heat at 200oC for 30 min Cooled down to room temperature Made up to 50 ml with water Digested sample Sample solution Cooled down to room temperature Made up to 50 ml with ... blood (Nishima et al., 1976) and the hair (Shimomura et al. 1980; Nakano and Wakisaka, 1976; Ando, 1998) has been reported. This diference may be explained by the amount of fish consumption,...