Method for determining copper ions by selenium film modified electrode

A technology for modifying electrodes and copper ions, applied in the direction of material electrochemical variables, etc., can solve the problems of low sensitivity of anodic dissolution method, affecting analytical performance, application limitations, etc., to improve reproducibility and accuracy, improve sensitivity, detect low limit effect
CN101650336AActive Publication Date: 2010-02-17SHAOXING MAIBAO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAOXING MAIBAO TECH CO LTD
Publication Date
2010-02-17

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Abstract

The invention relates to a method for determining copper ions by a selenium film modified electrode, which adopts an electrochemical three-electrode testing system and an anodic stripping differentialtiming potentiometric method for determination. Thermal cracking graphite is used as an electrode substrate, a selenium film formed by reducing and enriching Na2SeO3 and Cu (II) in an acidizing medium of dilute hydrochloric acid is used as a working electrode, a selenide of copper Cu2Se is reduced and enriched on the working electrode, a differential curve of dT / dE-E is obtained by recording thevariation function of the potential E along with the testing time T on the working electrode and carrying out differential processing, and the content of Cu (II) can be calculated by the height of the characteristic response peak on the differential curve. The method of the invention overcomes the defects of environmental hazards, hypertoxicity and the like of the traditional mercury electrode, has the advantages of high testing sensitivity, strong anti-interference property, good environmental protection, low cost, short processes, convenient operation and high efficiency, and can be used for the analysis and determination of micro or trace amount of copper ions in natural water.
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Description

1. Technical field

[0001] The invention relates to a method for analyzing and measuring inorganic ions, in particular to an electrochemical analysis method for copper ions, in particular to a method for measuring copper ions with a selenium film modified electrode. 2. Background technology

[0002] Copper is an important natural metal element that is widely distributed and exists in the natural environment. It is widely used in the metallurgical industry, textile pigments, composite material production, ceramics, semiconductors, batteries, cables, etc., and even in industrial fields such as medicine[Removal of copper(II)ions from aqueous solution by biosorption onto agricultural waste sugar beet pulp. Process Biochemistry, 2005, 40(2): 3031-3044; medical application of copper ions. Chinese Journal of Medical Research, 2006, 6(4): 382- 383]. Due to rock weathering, soil erosion, etc. in nature and human production activities, especially chemical industry, printing and dyeing...

Claims

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