环境水样中痕量铜的催化动力学光度法测定

本文概要地阐述了催化动力学光度法的基本原理、分析方法的特点、分类、应用价值及催化动力学分析法的研究现状、发展方向等^1-5]。根据痕量的铜能催化K2S2O8氧化1-（2-吡啶偶氮）-2-萘酚（PAN）而使PAN褪色，褪色的程度与铜的含量有关这一事实，测定痕量铜^6-10]。实验表明：催化体系和非催化体系的最大吸收波长均为453nm，铜量在0．2～1．0ug／25mL范围内，其含量与非催化体系和催化体系的吸光度的差值成正比。方法灵敏度高，选择性好，操作方便，用于环境水样中痕量铜的测定，结果比较满意。

Determination of Trace Copper(Ⅱ) in Environment Water by Using Catalytic Kinetic Spectrophotometry

A method of trace amount of Cu was set up to determine with high sensitivity and good selectivity. The K2S2O8 was used as oxidant, and the PAN was used as the color show. In the acid medium, the trace amount of Cu had the very strong catalysis action in fading color of the K2S2O8 burning PAN, which catalysis degree was related to quantity of copper. In each system, the stability was enunciated in the assaying： the matching thing can stable above 2 hours at least. The basic principle of the dynamics analysis method and the catalyzed dynamics luminosity cussed. The results show that the maximum absorption of the complex was at 453nm, Beer＇ law was obeyed for Cu （ Ⅱ ） in the range of 0.2 - 1.0 ug/25 mL. The method could be applied to the determination of Cu environmental water with satisfactory results.