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4.0×10-11g/mL。方法可用于水中铜的测定。
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 uncatalytic systems were measured at 540 nm and 660 nm. The linear range of detennination was 0. 00080 - 0.048 μg/mL. The detection limit was 4.0 × 10^-11 g/mL. The method was applied to the determination of copper in water with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2009年第12期74-76,共3页
Chinese Journal of Analysis Laboratory
基金
安徽省高校省级自然科学研究重点(KJ2008A122)项目资助
关键词
铜
催化光度法
双波长
双指示剂
亚甲基蓝
罗丹明B
Copper
Catalytic spectrophotometry
Dual-wavelength
Dual-indicator
Methylene blue
Rhodamine B
