A stepwise method for detecting the concentration of hydrogen peroxide solution

A hydrogen peroxide solution, hydrogen peroxide technology, applied in the field of analysis and detection, can solve the problems of inaccurate and effective quantitative detection, poor sensitivity, slow detection speed, etc., and achieve the effect of improving the linear detection range, reducing the detection limit, and simple materials

Active Publication Date: 2019-08-09
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A stepwise method for detecting the concentration of hydrogen peroxide solution
  • A stepwise method for detecting the concentration of hydrogen peroxide solution
  • A stepwise method for detecting the concentration of hydrogen peroxide solution

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Example 1. Indocyanine green modified NaLuF coated with Ag 4 : Yb, Er's core-shell structured rare earth nanomaterials to detect hydrogen peroxide (H 2 O 2 ) Concentration of aqueous solution:

[0071] 1) Drawing the standard curve: respectively add 300μL of 2μM, 4μM, 8μM, 16μM, 32μM hydrogen peroxide (H 2 O 2 ) Aqueous solution and 700μL 1mM indocyanine green modified NaLuF coated with Ag 4 : Yb, Er core-shell structure rare earth nano-material aqueous solution is uniformly mixed, and after standing for 10 minutes at 25℃, the luminous intensity of the mixed solution is measured, and the data is processed to obtain a linear graph of relative luminous intensity, and the concentration and luminous intensity standard are obtained Curve like figure 1 Shown. The detection range is 2μM-32μM, and the lowest detection limit can reach 2μM.

[0072] Add 300 μL of 10nM, 50nM, 100nM, 500nM, 2μM hydrogen peroxide (H 2 O 2 ) Aqueous solution and 700μL, 1mM indocyanine green modified nanom...

Embodiment 2

[0085] Example 2: Prussian blue coated NaYF 4 : Yb, Er's rare earth nanomaterials for detecting hydrogen peroxide (H 2 O 2 ) Concentration of aqueous solution:

[0086] 1) Drawing the standard curve: respectively add 300μL of 5μM, 10μM, 15μM, 20μM, 25μM, 30μM hydrogen peroxide (H 2 O 2 ) Aqueous solution and 700μL 1mM Prussian blue coated NaYF 4 : Yb, Er rare earth nano-material aqueous solution is uniformly mixed, after standing for 10 minutes at 25 ℃, the luminous intensity of the mixed solution is measured respectively, and the data is processed to obtain a linear graph of relative luminous intensity, and a standard curve of concentration and luminous intensity is obtained, such as Figure 7 Shown. The detection range is 5μM-30μM, and the lowest detection limit can reach 5μM.

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

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

Claims

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Application Information

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Patent Type & Authority Patents(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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