| 摘要: |
| 在稀氨水溶液中,以KCl溶液为活化剂,过氧化氢与溴甲酚紫的氧化还原反应多铜(Ⅱ)催化,而使吸光度值降低,据此建立了痕量铜的新催化动力学光度法。方法的摩尔吸光系数为5.28×105L·mol-1·cm-1,检出限为4.44×10-9g/mL,线性范围为0~0.6μg/25mL,已用于桂林风景点水中痕量铜(Ⅱ)的测定,结果满意。 |
| 关键词: 铜(Ⅱ) 催化分光光度法 溴甲酚紫 氯化钾 |
| DOI： |
| 投稿时间：1997-08-13修订日期：1998-03-29 |
| 基金项目: |
|
| A Study of Catalytic Kinetics Spectrophotometry for Determining Trace Copper(Ⅱ) |
|
Liu Zheng, Zeng Hui
|
| (Dept. of Applied Chem., Guilin Institute of Technology, 12 Jianganlu, Guilin, Guangxi, 541004) |
| Abstract: |
| A new catalytic spectrophotometric method for determining trace copper(Ⅱ) has been developed.The method is based on the catalytic oxidation of bromocresol purple by H2O2 in the media of ammonia water and KCl as an activator.The molar absorption coefficient is 5.28×105 L·mol-1.cm-1. The limit of detemination is 4.44×10-9 g/mL. The linear range of determination is 0~0.6 μg/25 mL for copper(Ⅱ).The method has been used to determine trace copper(Ⅱ) in water from scenic spots of Guilin. The results were satisfactory. |
| Key words: copper (Ⅱ) catalytic spectrophotometry bromocresol purple potassium chloride |
