论文部分内容阅读
以 TBP为萃取剂,四氯化碳为稀释剂萃取碲的溴络合物的组成为H_2TeBr_6·_4TBP。其反应为: _2H_(W)~+ +Te_(W)~(+4)+6Br_(W)~- +_4TBP_(0)?H_2TeBr_6·_4TBP_(0)该萃取反应为放热反应。 硒和碲分离的主要条件为:60％ TBP;NaBr浓度为5 N;酸度为0.3——0.6N。 所建立的方法可用于大量硒存在下微量碲的分离和测定,用于二氧化硒中微量碲的测定,获得良好结果。
The composition of bromine complex extracted with tellurium by using TBP as extractant and carbon tetrachloride as diluent is H 2 TeBr_6 · _4TBP. The reaction is: _2H_ (W) ~ + + Te_ (W) ~ (+4) + 6Br_ (W) ~ - + _4TBP_ (0) ~ H_2TeBr_6 · _4TBP_ (0) The extraction reaction is exothermic. Selenium and tellurium separation of the main conditions: 60% TBP; NaBr concentration of 5N; acidity of 0.3--0.6N. The established method can be used for the separation and determination of trace tellurium in the presence of a large amount of selenium, and is used for the determination of trace amount of tellurium in selenium dioxide and obtains good results.