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Stepped method for detecting concentration of hydrogen peroxide solution

A hydrogen peroxide solution and hydrogen peroxide technology, applied in the field of analysis and detection, can solve the problems of slow detection speed, inability to accurately and effectively quantitative detection, poor sensitivity, etc., and achieve the effects of reducing detection limit, improving linear detection range and low price.

Active Publication Date: 2017-04-26
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in the current common analysis methods, such as: slow detection speed, poor sensitivity, or incapable of accurate and effective quantitative detection, etc.

Method used

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  • Stepped method for detecting concentration of hydrogen peroxide solution
  • Stepped method for detecting concentration of hydrogen peroxide solution
  • Stepped method for detecting concentration of hydrogen peroxide solution

Examples

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Effect test

Embodiment 1

[0070] Example 1. Indocyanine green modified NaLuF coated with Ag 4 Detection of hydrogen peroxide (H 2 O 2 ) The concentration of the aqueous solution:

[0071] 1) Drawing of standard curve: 300 μL of 2 μM, 4 μM, 8 μM, 16 μM and 32 μM hydrogen peroxide (H 2 O 2 ) aqueous solution and 700 μL of 1 mM indocyanine green to modify Ag-coated NaLuF 4 : Yb,Er core-shell structure rare earth nanomaterial aqueous solution is evenly mixed, after standing at 25 ℃ for 10 minutes, the luminescence intensity of the mixed solution is measured respectively, and the data is processed to obtain a linear spectrum of relative luminescence intensity, and the standard of concentration and luminescence intensity is obtained. curve, such as figure 1 shown. The detection range is 2μM-32μM, and the lowest detection limit can reach 2μM.

[0072] 300 μL of 10 nM, 50 nM, 100 nM, 500 nM, 2 μM hydrogen peroxide (H 2 O 2) aqueous solution and 700 μL, 1 mM indocyanine green modified Ag-coated nanomat...

Embodiment 2

[0085] Embodiment 2, Prussian blue coating NaYF 4 : Yb,Er rare earth nanomaterials to detect hydrogen peroxide (H 2 O 2 ) The concentration of the aqueous solution:

[0086] 1) Drawing of standard curve: 300 μL of 5 μM, 10 μM, 15 μM, 20 μM, 25 μM and 30 μM hydrogen peroxide (H 2 O 2 ) aqueous solution with 700 μL of 1 mM Prussian blue-coated NaYF 4 : Yb, Er rare earth nanomaterial aqueous solutions are evenly mixed, and after standing at 25°C for 10 minutes, the luminescence intensity of the mixture is measured respectively, and the data is processed to obtain a linear spectrum of relative luminescence intensity, and a standard curve of concentration and luminescence intensity is obtained, such as Figure 7 shown. The detection range is 5μM-30μM, and the lowest detection limit can reach 5μM.

[0087] 300 μL of 20 nM, 50 nM, 0.1 μM, 0.5 μM, 1 μM, and 5 μM hydrogen peroxide (H 2 O 2 ) aqueous solution with 700 μL, 1 mM Prussian blue-coated NaYF 4 : Yb, Er rare earth nan...

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Abstract

The invention discloses a stepped method for detecting the concentration of a hydrogen peroxide solution. The stepped method includes the following steps that 1, a photothermal conversion material reacting with hydrogen peroxide is used for modifying a nanometer material containing a rare earth element, so that a functional rare earth nanometer material is obtained; 2, a series of hydrogen peroxide solution with the standard concentration reacts with the functional rare earth nanometer material to obtain a series of mixed solution, the luminous intensity, ultraviolet-visible light absorption intensity and photo-thermal heating temperature of the mixed solution are detected, and a standard curve of the luminous intensity, ultraviolet-light absorption intensity, heating temperature and concentration is drawn; 3, the hydrogen peroxide solution with unknown concentration reacts with the functional rare earth nanometer material to obtain a mixed solution, a detecting mode is determined, corresponding data is determined, and the concentration can be obtained through comparison with the standard curve. The detection limit is effectively lowered, and meanwhile the linear detection range is promoted. The material is simple, an instrument is low in price, and the stepped method can be used for detecting foods, medicine, living body samples and other samples.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a method for stepwise detection of the concentration of hydrogen peroxide solution based on functionalized rare earth nanomaterials. Background technique [0002] Hydrogen peroxide is a small molecule with strong oxidizing properties produced by the natural metabolism of organisms, and hydrogen peroxide is a recognized cytotoxic substance. Abnormal levels of hydrogen peroxide in organisms can cause damage to single-stranded DNA, protein denaturation, reduced biological activity of enzymes, reduced fluidity of cell membranes, and peroxidation of cytoplasmic substrates. At present, the common analytical methods include optical detection, electrochemical detection and so on. However, the current common analytical methods have many defects, such as slow detection speed, poor sensitivity or inability to accurately and effectively perform quantitative detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01N21/31G01N21/63
CPCG01N21/171G01N21/314G01N21/63G01N2021/3155
Inventor 周晶郭权炜刘瑜鑫张戈贾琪
Owner CAPITAL NORMAL UNIVERSITY
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