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Method for detecting trace concentration of copper ions

An ion concentration detection and copper ion technology, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of inappropriate real-time monitoring of trace copper ions, high requirements for water sample pretreatment, time-consuming and labor-intensive, etc., to achieve a wide range of pH detection environments, accurate High degree, simple and convenient operation

Inactive Publication Date: 2013-10-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
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Problems solved by technology

[0004] However, the above copper ion detection methods are mostly trace detection, and all require sophisticated detection instruments, high requirements for water sample pretreatment, complicated operation, time-consuming and laborious, and are not suitable for fast and simple real-time monitoring of trace copper ions

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  • Method for detecting trace concentration of copper ions
  • Method for detecting trace concentration of copper ions
  • Method for detecting trace concentration of copper ions

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Embodiment Construction

[0021] The following embodiments describe the present invention in detail in conjunction with the accompanying drawings.

[0022] When preparing AHMT test solution, the concentration range of nitric acid is 40mmol / L~1.2mol / L, the dosage of AHMT is 1.5mg~30mg, the concentration of AHMT in the test solution is 10mmol / L~200mmol / L, and the molar ratio of nitric acid to AHMT is 4 : 1~6:1, when the molar ratio of nitric acid and AHMT is 6:1, the amount of AHMT can be up to 30mg; the molar ratio of AHMT in the detection solution to copper ions in the known concentration copper ion solution is 1.1:1~5 : 1; the pH range of the copper ion solution to be measured is 1~7, preferably 1~6.

[0023] In this example:

[0024] Preparation of AHMT detection solution: Take 1.5mg-30mg of AHMT powder, dissolve it in nitric acid with a concentration of 90mmol / L, and prepare 50mL of AHMT detection solution with a concentration of 20mmol / L.

[0025] figure 1 is the ultraviolet-visible spectrum cur...

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Abstract

The invention relates to a method for detecting trace concentration of copper ions, which comprises the following steps: preparing an AHMT (4-amino-3-hydrazino-5-mercapto-1,2,4-triazol) detection solution; drawing a standard work curve; and detecting concentration of copper ions: dropwisely adding the AHMT detection solution to a to-be-detected copper ion solution with an unknown concentration, sufficiently stirring, standing for 1-10 minutes to obtain a reaction product solution to be detected, testing the reaction product solution to be detected with an ultraviolet-visible spectrophotometer to obtain a first ultraviolet visible spectrum curve and further obtain a first absorbance of characteristic absorption peak, and acquiring the first concentration of copper ions corresponding to the first absorbance according to the first absorbance on the basis of the standard work curve.

Description

technical field [0001] The invention relates to a method for detecting the concentration of trace copper ions based on a 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (hereinafter referred to as AHMT) detection solution using an ultraviolet-visible spectrophotometer . Background technique [0002] Copper is an indispensable micronutrient for human health. It has an important impact on the development and function of blood, central nervous system and immune system, hair, skin and bone tissue, as well as internal organs such as brain, liver and heart. Moreover, the application of copper is very extensive, involving almost every industry, such as: electrical industry, electronics industry, energy and petrochemical industry, transportation industry, machinery and metallurgical industry, etc. Therefore, the rapid and accurate detection of copper ions is of great significance. [0003] At present, flame atomic absorption method, ion chromatography, electrochemical method, etc. a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/33
Inventor 周仕林高明慧缪煜清杨卓圆刘芳刘晓艳欧阳瑞镯陈良霞
Owner UNIV OF SHANGHAI FOR SCI & TECH