摘要
在盐酸介质中,依据溴酸根离子氧化靛红褪色的原理提出了测定溴酸根离子的新方法,研究了测定的最佳条件。最大吸收波长λmax为610 nm,溴酸根离子在3-40μg／10 mL范围内符合比尔定律,测定的线性回归方程为A610=0．208 0ρ+0．081 6,相关系数为0．993 7,表观摩尔吸光系数为3．7×104。该法用于化学试剂中的微量溴酸根测定,结果满意。
A new photometric method for the determination of micro amounts of bromate is proposed based on the oxidation of isatin by bromate in HCl medium. The optimal conditions were studied. The maximum absorption of isatin lies at 610 nm. Beer＇s law was obeyed when the bromate concentration is within the range of 3-40μg/10 mL, the determined regressive equation was A610=0. 208 0ρ＋0. 081 6, the related coefficient was 0. 993 7 and the molar absorption coeffi cient was 3. 7×10^4. The proposed method has been applied to the determination of micro a mounts of in chemical reagents with satisfactory results.
出处
《淮海工学院学报（自然科学版）》
CAS
2005年第4期49-51,共3页
Journal of Huaihai Institute of Technology:Natural Sciences Edition
基金
江苏省高校自然科学研究指导性计划项目(03KJD150031)
