摘要
氟硅酸钾容量法测定高钛铁铝土矿中二氧化硅,由于存在钛和铝,使该法测定结果很不稳定。本实验为克服此现象在强酸介质中加入1~2 m L过氧化氢,使钛形成络合物,消除其影响。指示剂采用硝氮黄,滴定终点由黄突变为紫色,避免滴定终点不明确。
The determination of silicon dioxide in high titanium bauxite by potassium fluosilieate volumetric method, the deter- mination results is not stable due to titanium and iron existing. In order to overcome this unstable phenomenon, 1 -2mL hydrogen peroxide is added to the strong acid medium, so the titanium shall form compounds to eliminate its influence. The indicator is nitrazine yellow; the ti- tration end point shall be changed from yellow into purple, in order to avoid the undefined titration end point.
出处
《云南冶金》
2015年第1期60-62,共3页
Yunnan Metallurgy
关键词
高钛铝土矿
过氧化氢
二氧化硅
氟硅酸钾法
high titanium bauxite
hydrogen peroxide
silicon dioxide
potassium fluosilieate volumetric method
