... the North of Viet Nam Received 06-8-2002 Trinh Xuan Gian, Le Lan Anh, Vu Duc Loi, Tran Van Huy1, Hirokatsu Akagy2, Mineshi Sakamoto21Institute of Chemistry, Viet Nam National Center ... 2National Institute for Minamata dissease, Japan Summary To obtain the basic information on human exposure to mercury (Hg) due to gold mining activities in North of Viet Nam, total mercury was ... 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...