摘要
硅铁中铁含量的测定方法是:用硝酸、氢氟酸分解试样,冒高氯酸烟驱氟,用氯化亚锡将大量铁还原后,加三氯化钛还原剩余的铁,用稀重铬酸钾氧化过量的还原剂,以二笨胺磺酸钠作指示剂,用重铬酸钾标准溶液滴定。
The test sample was dissolved in nitric acid and hydrofluoric acid,and perchloric acid fume was used to destroy fluorine.Add titanium trichloride to reduce the remaining Fe after the most of Fe was reduced by stannous chloride,then excess reducing agent was oxidated by dilute potassium dichromate.At last,it titrates with potassium dichromate,using the sodium diphenylamine sulfonate as a catalyst.
出处
《大众科技》
2013年第4期80-82,共3页
Popular Science & Technology
关键词
硅铁
铁含量
重铬酸钾滴定法
ferrosilicon
Iron content
potassium dichromate titration
