摘要
对无汞法测定铁矿石中铁含量的实验进行改进,采用SnCl2直接还原无色钨酸钠为蓝色,不需加入TiCl3.以CuSO4作催化剂,利用水中的溶解氧可使钨蓝迅速消失,不用稀释的K2Cr2O7标准溶液至蓝色消失.经实验证明,该方法不仅结果准确度、精确度较高,而且现象易于观察、学生操作简单方便,并降低了实验费用.
A method of the experiment of determination of iron in ferrous ore by none mercury method is improved. Without TiCl2 SnCl2 can directly reduce colorless Na2WO3 into blue color, which can be rapidly eliminated by the oxygen in water,instead of diluted K2Cr2O7,with CuSO4 as catalyst. The proposed method has the advantages of obvious phenomeon,simple procedures,easily operate and decreasing the experiment cost with high higher accuracy and better precision.
出处
《保定学院学报》
2008年第4期11-12,共2页
Journal of Baoding University
关键词
铁
无汞法
实验改进
iron
none mercury method
experimental improvement
