多硫化アルカリとの反応による硫シアン化合物の定量 (第1報)

抄録

For the determination of organic thiocyanate compounds, the procedure of Pantschenko and Smirnow was reëxamined and the results obtained were unsatisfactory. The cause of such insufficiency of their determination method was concluded as being due to the complication of the reaction by the hydrolysis or solvolysis of alkali sulfide. Further, the reaction of benzyl thiocyanate and sodium trisulfide was studied in detail and it was clarified that thiocyanate ion was formed in equivalent amount during this reaction and that the disulfide was isolated and identified in almost equivalent amount. By the argentometry of the thiocyanate ion thereby formed, determination of benzyl thiocyanate was successfully concluded. The accuracy was ± 0.5%.