摘要
试样以王水分解后，利用双氧水的强氧化性，将试液中的二价铁完全氧化至三价，以磺基水杨酸为指示剂，用EDTA标准溶液滴定至溶液由红紫色变为亮黄色为终点，以此测定锰矿石中的全铁。在试验条件下进行测定，相对标准偏差为0．79～2．14％。此法简便、快速、结果准确可靠。适用于锰矿石中全铁含量大于0．1％试样的测定。
The sample is dissolved in aqua regia, using strong oxidation of hydrogen peroxide, two valent iron in solution was completely oxidized to ferric, sulfosalicylic acid as indicator, with EDTA standard solution titration to solution from purple to yellow as the end point, the determination of total iron in manganese ore. Determination was carried out under the experimental condition, the relative standard deviation is 0.79 -- 2.14%. The method is simple, rapid, accurate and reliable results. Be applicable to the determination of manganese ore in the iron content of more than 0.1% specimens.
出处
《中国材料科技与设备》
2013年第6期62-64,共3页
Chinese Materials Science Technology & Equipment
关键词
锰矿石
全铁
快速测定
Manganese ore
Full iron
Rapid determination
