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Nanometer sensing method for separately or simultaneously detecting iron ions and copper ions, and applications

A sensing method, iron ion technology, applied in nanotechnology for materials and surface science, nanotechnology for sensing, nanotechnology, etc., can solve problems such as inconvenient use, expensive instruments, cumbersome operation, etc. Achieve the effect of low price, good catalytic activity and high fluorescence intensity

Inactive Publication Date: 2017-02-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Atomic absorption spectrometry, voltammetry, inductively coupled plasma mass spectrometry, etc. are commonly used in reports on the determination of i

Method used

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  • Nanometer sensing method for separately or simultaneously detecting iron ions and copper ions, and applications
  • Nanometer sensing method for separately or simultaneously detecting iron ions and copper ions, and applications
  • Nanometer sensing method for separately or simultaneously detecting iron ions and copper ions, and applications

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Take 150 μL of gold nanocluster solution, add hydrogen peroxide solution and TMB solution with a molar mass ratio of 1:10 to it, rotate on a vortex to mix well, then place the above mixed solution on a rotating mixing rack, and react at room temperature , Monitored with a UV spectrophotometer, and observed the color change. figure 1 Fe prepared for this example 3+ and Cu 2+ Detected sensor GSH-AuNCs–TMB–H 2 o 2 The color change and UV absorption spectrum of the system. It can be concluded from the figure that after adding TMB solution and hydrogen peroxide to the GSH-AuNCs solution, the color of the solution turns green, and an obvious absorption peak appears at 652nm, while when the TMB solution is mixed with H 2 o 2 Or when GSH-AuNCs coexisted with TMB solution, the solution would not turn green, and no obvious absorption peak appeared. When GSH-AuNCs–TMB–H 2 o 2 When copper ions existed in the system, the color of the solution became lighter and the absorbanc...

Embodiment 2

[0044] Take 150 μL of gold nanocluster solution, add hydrogen peroxide solution and TMB solution with a molar mass ratio of 1:50, rotate on a vortex to mix well, then place the above mixed solution on a rotating mixing rack, and react at room temperature , Monitored with a UV spectrophotometer, and observed the color change. The results indicated that GSH-AuNCs could 2 o 2 Catalytic oxidation of TMB into ox-TMB under the condition of existence, and the three are indispensable.

Embodiment 3

[0046] Take 150 μL of gold nanocluster solution, add hydrogen peroxide solution and TMB solution with a molar mass ratio of 1:100 to it, rotate on a vortex to make it evenly mixed, then place the above mixed solution on a rotating mixing rack, and react at room temperature , Monitored with a UV spectrophotometer, and observed the color change. The results indicated that GSH-AuNCs could 2 o 2 Catalytic oxidation of TMB into ox-TMB under the condition of existence, and the three are indispensable.

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Abstract

The invention relates to a nanometer sensing method for separately or simultaneously detecting iron ions and copper ions, and applications. The nanometer sensing method comprises the following steps of: adding Fe<3+> or Cu<2+> into a gold nanocluster water solution, TMB solution and hydrogen peroxide solution system, and fully reacting so as to realize the separate detection of two ions through the color change and the ultraviolet absorbency degree value change; respectively masking Fe<3+> and Cu<2+> through chelating agents NH4F and EDTA, and fully reacting so as to realize the simultaneous detection of two ions through the color change and the ultraviolet absorbency degree value change. The gold nanoclusters having excellent optical properties, high fluorescent intensity, high stability and good catalytic activity are adopted, nanomaterials widely applied into the ion detection, bioimaging, genetic markers, biosensing, medicines and catalysis fields, and the nanometer technology is applied to the field of ion detection.

Description

technical field [0001] The invention relates to the technical field of ion diagnosis, in particular to the preparation of a gold nanocluster complex and a sensor for the detection of iron ions and copper ions. 3,3',5,5'-Tetramethylbenzidine was reacted to construct an ion detection sensor, and then the GSH-AuNCs--TMB--H 2 o 2 The color change of the system and the introduction of different chelating agents realize the visual and quantitative detection of iron ions and copper ions. Background technique [0002] Due to their special physical and chemical properties, metal nanomaterials have been widely used in various fields, such as molecular detection, biological imaging, gene labeling, drug controlled release, etc. As a new type of fluorescent nanomaterials, metal nanoclusters have aroused extensive research interest of scholars in recent years. Metal nanoclusters with high fluorescence intensity and high stability have been intensively reported as fluorescent probes for...

Claims

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Application Information

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IPC IPC(8): G01N21/33B82Y15/00B82Y30/00
CPCB82Y15/00B82Y30/00G01N21/33
Inventor 常津赵倩宫晓群武玉东朴佳芳彭伟盼
Owner TIANJIN UNIV
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