In the analysis of the Xanthate in Japan, the Horiuchi's method has been regarded as the standard method. It is a modified form of Hirschkind's HCl-titration method.
When, however, the Horiuchi's method was standardized, the present author expressed his opposition to the Horiuchi's calculation although he agreed with him on his operation. That is because his calculation has the following illogical point in it.
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Now in this case A-c/2=Caustic Alkali. But in case Na
2CS
3 exist as impurity, A-c/2=-α…(-α=Acidic)
Thus this method proves illogical.
The pressent author has been engaged in the analysis of the Xanthate prcduceci in Japan for more than ten years, and has ascertained that its impurities mainly consist of Na
2CS
3 with a slight amount of NaOH, Na
2S, etc.
Therefore the author recommends the following calculation adopted at Besshi as an analytical method for industry:-
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Moreover, the author has proved the exactness of the above mentioned Besshi formula by carrying on experiments adding various impurities fo the pure Xanthate.
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