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The average concentration of total Sn in surface layer is 2.90 μg/1 and that of total Bi 0.50 μg/1. The free ion, bound and particulate forms of Sn in Changjiang (Yangtze River) Estuary account for 20%, 30% and 50% of the total Sn respectively, and those of Bi 25%, 35% and 40% respectively. In the surface water of the Pacific, the total Sn is 2.06 μg/1, and the percentages of the three forms of Sn are 50, 30 and 20% respectively. The total Bi are 0.38 μg/1, and the percentages of the three forms of Bi are 55, 25 and 20% respectively. The concentrations of free ions of Sn and Bi in 0-1400 m and 0-1900 m in 18 and 19 stations are in vertical homogeneous distribution. The slight similarity in distribution between Bi ion and salinity may be due to the influence of organisms and biochemistry.
The average concentration of total Sn in surface layer is 2.90 μg / 1 and that of total Bi 0.50 μg / 1. The free ion, bound and particulate forms of Sn in Changjiang (Yangtze River) Estuary account for 20%, 30% and 50 % of the total Sn respectively, and those of Bi 25%, 35% and 40% respectively. In the surface water of the Pacific, the total Sn is 2.06 μg / 1, and the percentages of the three forms of Sn are 50, The total Bi are 0.38 μg / 1, and the percentages of the three forms of Bi are 55, 25 and 20% respectively. The concentrations of free ions of Sn and Bi in 0-1400 m and 0- 1900 m in 18 and 19 stations are in vertical homogeneous distribution. The slight similarity in distribution between Bi ion and salinity may be due to the influence of organisms and biochemistry.