摘要
研究了用硼氢化钾还原铁(Ⅲ),二苯胺磺酸钠为指示剂的高锰酸钾测定铁(Ⅱ)的方法.用此法测定铁矿中全铁时,变异系数为0.06%-0.08%,回收率99.1%—102.2%.通过配对试验和非配对试验表明,此法与一般常用的重铬酸钾法无显著性差异(置信度95%).方法简便,既无汞又无铬,不污染环境.可用于铁矿及其他试样中常量铁的测定.
This paper has studied a method for titration of iron. In this method, potassium borohydride was for reducing agent and sodium diphenylamine sulfonate as indicator, titration of iron with potassium permanganate. When this method was used to determination of tolal iron in iron ores, the variation coefficient were 0.06 %-0.08%, and recovery were 99.1 %-102.2%. By means of paired and unpaired experiments, it shows that there would be no notable difference (confidence is 95 %) between this method and that of using conventional potassium dichromate method. This simple and convenient method, would not pollute the environment because in the absonce of mercury and chromium(VI), so it can also be applied to the determination of usual amounts of iron in iron ores and other samples.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1991年第4期440-445,共6页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
铁
滴定法
硼氢化钾
高锰酸钾
测定
iron
KBH4
KMnO4
titration method
sodium diphenylamine sulfonate
