摘要
硫氰酸盐光度法是测定钼、钨的经典方法。试样经溶解后,用氯化亚锡作还原剂,在硫酸介质中,Mo(Ⅵ)被还原为Mo(Ⅴ),然后与SCN-形成显桔红色配合物,而钨不被还原,用强还原剂(如三氯化钛)钼可被还原到更低价,而不与SCN-显色:而钨被还原为五价与SCN-显色;因此在同一溶液中测定钨、钼。本文就该法的测定做进一步的阐述。
Thiocyanate salt photometric method was the classical method to determine tungsten.The sample after dissolving,used as a reductant,and in ferrie sulfate-potassium thiosulfate sulphuric acid medium,Mo（Ⅵ） was reduced to Mo（Ⅴ）.The SCN-formation complexes,and showed the soiled W would not be restored,with strong reducing agent（such as three chlorinated titanium）.Mo can be lower reduction to,but not with the SCN-showed color,and W was reduced to five price and the SCN-showed color.So in the same solution,W and Mo can be determined,and the further explanation of determination was presented.
出处
《广州化工》
CAS
2011年第17期80-82,共3页
GuangZhou Chemical Industry
关键词
高温合金钢
硫氰酸盐光度法
钼、钨
high temperature alloy steel
thiocyanate salt photometric method
Mo
W
