硫酸ヴアナヂルによる鐵鋼中のマンガンの迅速定量法
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The author had stuied on the successive determination of manganese, chromium and vanadium in iron and steel by vanadyl sulphate (Tetsu to Hagane 34, 4∿6, 2. 1947) and this time, resumed the study of the rapid determination of manganese. This vanadyl method is superior to arsenious method as follows : (1) Reaction of titration is quantitative. (2) End point of titration is sharper than that of aresenious method. It takes only less than ten minutes to get accurate results. The vanadyl sulphate standard solution is prepared by reducing ammonium vanadate with hydrogen sulphide or zinc amalgame, and is standarized by titration with potassium permanganate.
- 1951-03-25
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