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A method for rapid detection of trace uranyl ions in water environment based on SERS technology

A technology for detecting uranyl ions and water, which is applied in the field of detection of trace ions in the water environment, can solve the problems of low sensitivity and selectivity, achieve good application prospects, good selectivity, and overcome the effects of expensive instruments

Active Publication Date: 2021-01-26
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The detection limit of the present invention is 3×10 -13 M, capable of ultra-sensitive detection of uranyl ions, effectively solving the problem of low sensitivity and selectivity of existing detection technologies

Method used

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  • A method for rapid detection of trace uranyl ions in water environment based on SERS technology
  • A method for rapid detection of trace uranyl ions in water environment based on SERS technology
  • A method for rapid detection of trace uranyl ions in water environment based on SERS technology

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Embodiment 1

[0047] A method for rapidly detecting trace uranyl ions in water environment based on SERS technology, comprising the steps of:

[0048] 1) Preparation of SERS substrate:

[0049] First use photolithography combined with deep silicon etching technology to etch the array of nano-silicon pillars in a certain arrangement on the silicon wafer; then use the array of nano-silicon pillars as a template to uniformly prepare ZnO thin films by atomic layer deposition; then use the water bath method Assemble a certain shape of nano-zinc oxide sheet silicon column array, the reaction solution is urea and zinc nitrate solution (1:1), after annealing, magnetron sputtering nano-silver to build a composite chip, and obtain an ultra-sensitive surface-enhanced Raman ordered composite array chip.

[0050] 2) Preparation of uranyl ion DNAzyme reaction solution:

[0051] Take out the double-stranded DNA that can specifically respond to uranyl ions and thaw it, centrifuge for 60 s at a speed of 6...

Embodiment 2

[0060] 1) Preparation of SERS substrate:

[0061] First use photolithography combined with deep silicon etching technology to etch the array of nano-silicon pillars in a certain arrangement on the silicon wafer; then use the array of nano-silicon pillars as a template to uniformly prepare ZnO thin films by atomic layer deposition; then use the water bath method Assemble a certain shape of nano-zinc oxide sheet silicon column array, the reaction solution is urea and zinc nitrate solution (1:1), after annealing, magnetron sputtering nano-silver to build a composite chip, and obtain an ultra-sensitive surface-enhanced Raman ordered composite array chip.

[0062] 2) Preparation of uranyl ion DNAzyme reaction solution:

[0063] Take out the double-stranded DNA that can specifically respond to uranyl ions and thaw it, centrifuge for 60 s at a speed of 6000 r.p.; prepare a 50 μM solution for later use.

[0064] 3) Modification of SERS biosensor chip;

[0065] Take out the single-s...

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Abstract

The invention discloses a method for rapidly detecting trace uranyl ions in water environment based on SERS technology, comprising the following steps: 1) preparation of SERS substrate; 2) preparation of uranyl ion DNAzyme reaction liquid; 3) SERS biosensing Modification of the chip: take out the single-stranded DNA that is partially complementary to the double-stranded DNA, thaw it, and prepare it to a certain concentration after centrifugation, and modify it to obtain the SERS substrate of the DNA. 4) Surface-enhanced Raman detection of uranyl ions; drop a certain concentration of uranyl ion water sample into the double-stranded DNAzyme reaction solution prepared in step 2), react for a period of time, and drop the mixed solution in step 3) After a period of reaction on the treated SERS substrate, Raman detection is performed. The detection method established by the invention has the advantages of high sensitivity, good selectivity, strong anti-matrix interference ability, simplicity and speed, and the like.

Description

technical field [0001] The invention relates to a detection method of trace uranyl ions, in particular to a method for rapidly detecting trace uranyl ions in water environment based on SERS technology, and belongs to the detection field of trace ions in water environment. Background technique [0002] As an important natural radioactive element and the most important nuclear fuel, uranium has widely known chemical toxicity and radioactivity, and has also attracted widespread attention. With the development of economy, science and technology, and the acceleration of industrialization, uranium, as an important strategic energy source, is more and more widely used in military, industrial and commercial fields due to its advantages such as high density and good toughness. For example, uranium is not only an important raw material for nuclear weapons and nuclear power reactors, but also can be used to make counterweights and ballasts on aircraft, radiation shields on medical equi...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 汪小琳何璇
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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