硫酸銅比重液の二,三の検討について

概要

論文の詳細を見る
Some examinations were conducted to find factors which give changes of the specific gravity of the standard copper sulfate solution. (1) So far more accurate and precise values could be assured by a certain device of specific gravity balance with the accuracy of a standard deviation of 0.000014. (2) By improving the preparing method of the standard copper sulfate solution as recommended by R.A.Phillips, mass production of the solution was made feasible within the variation of standard deviation of 0.00002 and with only a slight mean error of 0.000007. (3) The standard copper sulfate solution prepared by this method could be well reserved for 12 months after preparation without significant change of its appearance as well as its specific gravity even at room temperatures. (4) Cutting off ampules containing solution and sealing the end by ordinary rubber caps tightened by rubber bands, the value of specific gravity did not change for a fortnight. This is true even with solutions to which blood drops have been added. (5) If more than 50 drops of blood were dripped into the solution of 100 ml., the value of the specifc gravity decreased dawn to the figure of being effected to 0.0005.
社団法人日本産業衛生学会の論文
1963-12-20