摘要
本文对高含量As(Ⅲ、V)的萃取分离方法进行了研究。指出,在≥10.5mol/LHCl介质中用苯萃取,可使50mgAs(Ⅲ)定量分离(其萃取率达99.5%),共存的As(V)等不干扰。同时证明,向萃As(Ⅲ)后的液相中加过量的TiCl_3溶液,可使50mgAs(V)还原至As(Ⅲ),继用苯萃取分离,经水反萃取之后,均以碘量法完成测定。方法简便、快速,干扰少,对As(Ⅲ、V)的价态分析、具有广阔的应用前景。
A method of extraction-separation for high contents of As ( Ⅲ ) and As(V)has been investigated.It is shown50mg As(Ⅲ ) can be extracted quantitatively by benzene in HC1 medium(the extractable ratio is 99.5%)and coexistent As(V)does not interfere with the extraction-separation of As(Ⅲ)50mg AS(V)can also be extracted quantitatively after reduction toAs(Ⅲ) with TiCl_3 solution. As(Ⅲ) can be determined by iodimetry after re-extration with water. The method is simpleand rapid and many changeable valence metal ions do not interfere with the determination,so it will find promisingapplication is the valence state analysis of the high contents of As( Ⅲ )and As(V).
出处
《冶金分析》
CAS
CSCD
北大核心
1995年第4期7-11,共5页
Metallurgical Analysis
基金
国家自然科学基金
关键词
高含量砷(Ⅲ
V)
价态分析
萃取分离法
High contents of As(Ⅲ ,V), Valence state analysis, Extraction-separation