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Detection method of copper ion concentration in solution

A detection method and technology of copper ions, applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, can solve the problems of cumbersome processing, long analysis time, low sensitivity, etc., and achieve increased specific surface area, simple operation, The effect of high sensitivity

Active Publication Date: 2017-03-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the concentration of copper ions in solution in order to solve the problems of cumbersome pretreatment process, long analysis time and low sensitivity of the existing detection method for copper ion concentration

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  • Detection method of copper ion concentration in solution
  • Detection method of copper ion concentration in solution
  • Detection method of copper ion concentration in solution

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preparation example Construction

[0039] According to the present invention, the preparation method of the glassy carbon electrode or printed electrode 3D-PAAM-PA-PDA-H-GA-GCE / SPCE modified by the three-dimensional polyacrylamide-phytic acid-polydopamine conductive hydrogel preferably includes :

[0040] 1) Take acrylamide, N,N-methylenebisacrylamide (MBA) and phytic acid (PA) solutions into the reactor, add water and shake well to obtain a mixed solution, pass argon gas and supercharge for 5 to 15 minutes Then add dopamine solution, add potassium persulfate (KPS) after 5-10 minutes, continue to sonicate for 10-20 minutes, add N,N,N,N-tetramethylethylenediamine (TEMED) and mix quickly to obtain a pregel gel. Condensate; the molar ratio of the acrylamide, phytic acid and dopamine is preferably 50:2:1, the N,N-methylenebisacrylamide is a crosslinking agent, and the mass fraction is preferably 0.038%; TEMED As an accelerator, the mass fraction is 0.012%;

[0041]2) Pretreat the glassy carbon electrode or the pr...

Embodiment 1

[0058] Example 1 Preparation of polyacrylamide-phytic acid-polydopamine conductive hydrogel modified glassy carbon electrode

[0059] Prepare 0.17mol L -1 Dopamine, 6.0mol L -1 Acrylamide, 0.02mol L -1 , N,N-methylenebisacrylamide (MBA) and pH 7.5, 0.54mol L -1 Phytic acid monomer stock solution. Measure 667 μL of acrylamide (6.0mol L -1 ), 250μL MBA (0.02mol L -1 ), 250 μL PA (pH 7.5, 0.54mol L -1 ) and 250 μL of ultrapure water, and argon, 10 minutes after ultrasonication and adding 410 μL of dopamine solution, 5 minutes later, add 85.20 mg potassium persulfate (KPS), continue ultrasonication for 15 minutes, add 0.31 μL N,N,N,N- Tetramethylethylenediamine (TEMED) and rapidly mix to obtain the gel pre-coagulated liquid;

[0060] Glassy carbon electrode pretreatment: Polish the electrode with 1.0, 0.3, 0.05 μm polishing powder on the polishing cloth, rinse with ultrapure water, and ultrasonicate in acetone, ethanol, and ultrapure water for 1 min, and use ultrapure Wash...

Embodiment 2

[0063] Example 2 Preparation of printed electrodes modified by polyacrylamide-phytic acid-polydopamine conductive hydrogel

[0064] Prepare 0.17mol L -1 Dopamine, 6.0mol L -1 Acrylamide, 0.02mol L -1 , N,N-methylenebisacrylamide (MBA) and pH 7.5, 0.54mol L -1 Phytic acid monomer stock solution. Measure 667 μL of acrylamide (6.0mol L -1 ), 250μL MBA (0.02mol L -1 ), 250 μL PA (pH 7.5, 0.54mol L -1 ) and 250 μL of ultrapure water, and argon, 10 minutes after ultrasonication and adding 410 μL of dopamine solution, 5 minutes later, add 85.20 mg potassium persulfate (KPS), continue ultrasonication for 15 minutes, add 0.31 μL N,N,N,N- Tetramethylethylenediamine (TEMED) and rapidly mix to obtain the gel pre-coagulated liquid;

[0065] Printed electrode pretreatment: Ultrasound in acetone, ethanol, and ultrapure water for 1 min, rinse with ultrapure water each time after ultrasonication, and finally blow dry with nitrogen to obtain the pretreated printed electrode;

[0066] Mo...

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Abstract

Belonging to the technical field of ion concentration detection method, the invention provides a detection method of copper ion concentration in a solution. The method includes: firstly preparing a work electrode three-dimensional polyacrylamide-phytic acid-polydopamine conductive hydrogel modified glassy carbon electrode or printed electrode, and preparing copper ion solutions of different concentrations; then employing the work electrode prepared by step 1 to react with the copper ion solutions of different concentrations respectively, and recording current response values corresponding to the copper ion solutions respectively by differential pulse voltammetry; then drawing a standard curve and calculating a linear equation; and employing the work electrode prepared by step 1 to react with a to-be-detected sample solution, scanning the detection solution to obtain a differential pulse voltammetry curve, and substituting a current response value into the linear equation obtained in step 3 so as to obtain the copper ion concentration of the to-be-detected sample solution. The method provided by the invention has the advantages of simple operation, rapid detection, high sensitivity and good selectivity.

Description

technical field [0001] The invention belongs to the technical field of ion concentration detection methods, and in particular relates to a detection method for copper ion concentration in a solution. Background technique [0002] Copper is a common heavy metal element and one of the essential trace elements for life, but excessive intake of copper can lead to oxidative stress and many serious neurodegenerative diseases, such as Wilson's disease, Mencks Syndrome, Amyotrophic Lateral Sclerosis, and Alzheimer's Disease. Therefore, the analysis and detection of copper ions is particularly important. Although there are currently many methods for the detection of copper ions and each method has its unique advantages in a certain field, these methods include fluorescence sensors, inductively coupled plasma atomic emission spectrometry, atomic absorption spectrometry, etc. However, these methods have disadvantages such as cumbersome pretreatment process, long analysis time, high c...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 王振新赵珍陈宏达马立娜张婳
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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