| 摘要: |
| 根据pH值为5.0的HAc-NaAc溶液中,Cr6+催化H2O2氧化四氯四碘荧光素二钠的褪色反应,建立催化动力学光度法测定痕量Cr6+的新方法。新方法的检出限为1.05×10-9g/ml,测定线性范围为0~35μg/L Cr6+。新方法用于天然水中痕量Cr6+的测定,结果良好。 |
| 关键词: 催化动力学光度法 Cr6+ 四氯四碘荧光素二钠 |
| DOI： |
| 投稿时间：2004-02-06修订日期：2004-05-08 |
| 基金项目: |
|
| Catalytic Spectrophotometric Determination of Trace Cr6+ |
|
Tang Ningli
|
| (Department of Material and Chemical Engineering, Guilin Institute of Technology, 12 Jianganlu, Guilin, Guangxi, 541004, China) |
| Abstract: |
| A new sensitive kinetic method is proposed for the determination of Cr6+.The method is based on its catalytic effect on the redox reaction between hydrogen peroxide and tetrachlorotetraiodo-fluorescein disodium in HAc-NaAc solution of pH=5.0.The detection limit of Cr6+ in this method is 1.05×10-9g/ml and the linear response is in the range of 0~35μg/L Cr6+.The method has been applied to the determination of Cr6+ in natural water samples with satisfactory results after the water samples being treated by 732 positive ion exchange resin. |
| Key words: catalytic kinetic spectrophotometry Chromium (Ⅵ) tetrachlorotetraiodo-fluorescein disodium |
