| 双波长双指示剂催化光度法测定铜的研究 |
| |
| 引用本文： | 赵丽,孙登明.双波长双指示剂催化光度法测定铜的研究[J].分析试验室,2009,28(12). |
| |
| 作者姓名： | 赵丽 孙登明 |
| |
| 作者单位： | 1. 河南焦作化工高级技工学校,焦作,454002
2. 淮北煤炭师范学院化学系,淮北,235000 |
| |
| 基金项目： | 安徽省高校省级自然科学研究重点 |
| |
| 摘 要： | 研究了在pH 4.0的HAc～NaAc缓冲介质中,利用痕量铜(Ⅱ)催化过氧化氢氧化罗丹明B和亚甲基蓝褪色的指示反应,通过测量540 nm和660 nm下,催化体系和非催化体系吸光度的变化,建立了双波长双指示剂催化动力学光度法测定痕量铜的新方法.方法的线性范围为0.00080～0.048μg/mL,检出限为4.0×10~(-11) g/mL.方法可用于水中铜的测定.
|
| 关 键 词： | 铜 催化光度法 双波长 双指示剂 亚甲基蓝 罗丹明B |
Dual-wavelength dual-indicator catalytic spectrophotometric determination of trace copper |
| |
| ZHAO Li,SUN Deng-ming.Dual-wavelength dual-indicator catalytic spectrophotometric determination of trace copper[J].Chinese Journal of Analysis Laboratory,2009,28(12). |
| |
| Authors: | ZHAO Li SUN Deng-ming |
| |
| Institution: | ZHAO Li1 and SUN Deng-ming2(1.Jiaozuo Chemical Senior School of Technical Workers of Henan Province,Jiaozuo 454002,2.Department of Chemistry,Huaibei Coal Normal College,Huaibei 235000) |
| |
| Abstract: | A new dual-wavelength and dual-indicator catalytic kinetic spectrophotometric method for the determination of trace amount of copper was studied. It was based on copper(Ⅱ) catalyzing oxidation of rhodamine B and methylene blue by hydrogen peroxide in a buffer medium of HAc-NaAc (pH 4.0). The absorbances of the catalytic and uncata-lytic systems were treasured at 540 nm and 660 nm. The linear range of determination was 0.00080～0.048μg/mL. The detection limit was 4.0 × 10~(-11) g/mL. The method was applied to the determination of copper in water with sati-sfactory results. |
| |
| Keywords: | Copper Catalytic spectrophotometry Dual-wavelength Dual-indicator Methylene blue Rhodamine B |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
