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Copper ion detection method

A detection method, copper ion technology, applied in the field of element detection, can solve problems such as the influence of metal ion concentration, complex operation process, and interference in the extraction process, and achieve the effect of improving test accuracy

Inactive Publication Date: 2018-06-05
DALIAN UNIV OF TECH QINGDAO NEW ENERGY MATERIALS TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation process of this method is complicated, and it is affected by the concentration of metal ions, and the presence of multiple metal ions or other organic substances will interfere with the extraction process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In order to make the purpose and technical solution of the present invention clearer, the present invention will be further described in detail through the following examples.

[0023] (1) Take four 500mL copper-containing water samples and put them into 1000mL beakers, and label them 1 / 2 / 3 / 4 respectively.

[0024] (2) Accurately weigh 2 parts Molecular sieves are used as backup.

[0025] (3) Heat No. 1 / 2 water samples to 80°C and magnetically stir for 0.5°C, add step (2) molecular sieves to the water samples and continue to stir for 4 hours.

[0026] (4) Centrifuge No. 1 / 2 samples obtained in step (3) respectively, and dry them with molecular sieves at 60°C.

[0027] (5) Prepare 2 L of 1 mol / L NaOH solution for later use.

[0028] (6) Take 50 mL of the NaOH solution obtained in step (5) to ultrasonically elute the molecular sieve obtained in step (4), collect the eluent, and detect the copper ion content by using the complexation method of sodium diethylamine dithi...

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PUM

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Abstract

The invention relates to a copper ion detection method and belongs to the technical field of element detection. The copper ion detection method comprises the following steps: (1) weighing a copper-containing water sample, and putting into a flask; (2) weighing a 4A molecular sieve for later use; (3) heating the water sample, stirring for a certain time at a constant temperature, adding the 4A molecular sieve, and continuously stirring for a certain time; (4) centrifuging a sample obtained in the step (3), and drying the molecular sieve; (5) preparing a NaOH solution for later use; (6) performing ultrasonic elution on the molecular sieve obtained in the step (4) by using the NaOH solution, collecting an eluent, and detecting the content of copper ions by using a diethylamine dithio sodium formate complexing method. The method provided by the invention is simple and feasible, interference of other organic matters can be eliminated, and the testing precision can be improved.

Description

technical field [0001] The invention relates to a method for detecting copper ions, which belongs to the technical field of element detection. Background technique [0002] Molecular sieve is a kind of aluminosilicate compound with interconnected channels and skeleton structure and huge specific surface area. Due to the Al in its molecular sieve crystal structure 3+ Replaced part of Si 4+ position, resulting in excess negative charges in the crystal center, Na in the structure + 、K + , Ca 2+ , Mg 2+ These cations are free to move, and ion exchange occurs when they come into contact with cations or positively charged groups that are electrostatically adsorbed on the molecular sieve surface. In addition, molecular sieves have a large specific surface area, which provides the possibility for a large amount of adsorption of metal ions. [0003] The adsorption of molecular sieves to metal ions is inseparable from the structural characteristics of molecular sieves. The ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 池明祝玉洪李鹏廷姜大川张润德
Owner DALIAN UNIV OF TECH QINGDAO NEW ENERGY MATERIALS TECH RES INST CO LTD