铬黑T-溴酸钠催化动力学分光光度法测定铼  

Determination of rhenium by chrome black-T-sodium bromate catalytic kinetic spectrophotometry

作　　者：王毅梦[1] 樊雪梅[1,2] 

机构地区：[1]商洛学院化学工程与现代材料学院,商洛726000 [2]商洛市材料科学工程院,商洛726000

出　　处：《分析仪器》2015年第3期38-40,共3页Analytical Instrumentation

基　　金：陕西省科技统筹创新工程计划项目(2012KTDZ02-02);陕西省尾矿资源综合利用重点实验室项目(14SKY-FWK06);商洛市科技局计划项目(SK-2014-4)资助

摘　　要：基于在硫酸介质中,铼催化溴酸钠氧化铬黑T的褪色反应,建立了测定铼的光度分析新方法。确定了催化体系的动力学条件,计算得出催化反应的表观活化能Ea=39.12KJ/mol,反应速率常数为K=1.248×10-3/s。在选定的试验优条件下,铼的浓度在0-10.02mg/L范围内与相对吸光度呈良好的线性关系,检出限为2.7675mg/L。方法所用仪器简单,操作简便。A new method combined with ultraviolet visible spectrophotometry was developed for the determination of rhenium which catalyzed the reaction of chrome black‐T‐sodium bromate. The dynamic conditions of the catalytic system was determined and the catalytic reaction apparent activation energy and the reaction rate constant were calculated ,respectively ,Ea=39.12 KJ/mol and K=1.248 ＆#215; 10‐3/s. Under the optimal conditions ,the rhenium concentration showed a good linear relationship with the relative ab‐sorbance in the range of 0‐10.02 mg/L ,the detection limit was 2.7675 mg/L.

关 键 词：紫外-可见分光光度法 溴酸钠 铬黑T 高铼酸铵 

分 类 号：O657.3[理学—分析化学] P575.4[理学—化学]