海水の恒温 (25℃) 濃縮による比重と容積との関係 (第3報)

濃縮率の計算及び塩化曹達での飽和点の推定

抄録

(1) The chlorine content and the percentage volume after concentrating have been calculated from the specific gravity of the water at various degree of concentration by the following formulas.
For the 1st part
S₁=0.997968+0.012794.Cl₁...(1)
For the 2nd part
S₂=1.002943+0.011830.Cl₂...(2)
For the 3rd part
S₃=1.011613+0.010865.Cl₃...(3)
For the 1st part
C₁=172.21/(78.16041.S₁-78.00159)...(4)
For the 2nd part
C₂=172.21/(84.53013.S₂-84.77891)...(5)
For the 3rd part
C₃=172.21/(92.03611.Sa-93.10493)...(6)
where S_n=Ihe specific gravity of water
Cl_a=The chlorine content in grams per 100cc of water
C_l=100 Cl_o/Cl_n=The percentage volume after concentrating
Cl_o=The chlorine content of sea water=1.7221g/100cc in table 2.
Estimation has been made within the limits of concentration from the sea water to the water concentrated up to saturation with NaCl. Tabulation is as table 1 and 2.
(2) dC/dS has been calculated from the above formulas (4),(5) and (6), and tabulated in table 3 (Fig. 1). From these results the relation between the specific gravity and the percentage volume after concentrating may be observed.
(3) The point at which sea water becomes saturate with NaCl by concentrating has been estimated as follows S=1.2159, Cl=18.804.