Abstract：Based on the basic principle of TaσakoBa(ammonium ferric sulfate titration), the content of Ti2+, Ti3+ and low-valence titanium (Ti2++ Ti3+) in metallic titanium electrolyte was determined through two steps under CO2 protection atmosphere. The sample was dissolved by HCl-HF, the Ti2+ was oxidized to Ti3+ with H+. Then, Ti2++ Ti3+ was oxidized to Ti4+ with ammonium ferric sulfate. The excessive Fe3+ was titrated with titanium trichloride standard solution. The key influencing factors on determination results, such as addition amount of ammonium ferric sulfate, reaction acid, standard titration solution and oxygen interference, were tested to obtain the optimal reaction conditions. The low-valence titanium in two metallic titanium electrolytes was determined under the optimized conditions. The relative standard deviations (RSD, n=8) were less than 10 %. The recovery of pure Ti2O3 and TiO was higher than 97 %, which could meet the analytical requirements.
郑小敏,汪雪梅,杨平,苏洋. 硫酸高铁铵滴定法测定制备金属钛的电解质熔盐中Ti2+和Ti3+[J]. 冶金分析, 2011, 31(10): 29-33.
ZHENG Xiao-min WANG Xue-mei YANG Ping SU Yang. Determination of Ti2+ and Ti3+ in electrolyte fused salt for preparing metallic titanium by ammonium ferric sulfate titration. , 2011, 31(10): 29-33.
