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A metal ion detection method and its special sensor array

A sensor array and metal ion technology, applied in the field of spectral analysis, can solve the problems of high efficiency, large information metal ion identification and detection, etc.

Active Publication Date: 2018-11-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above methods can identify and detect metal ions with high efficiency and large information.

Method used

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  • A metal ion detection method and its special sensor array
  • A metal ion detection method and its special sensor array
  • A metal ion detection method and its special sensor array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] Embodiment 1, metal ion sensor array

[0153] as attached figure 1 As shown, the metal ion sensor array of the present invention includes a low-temperature plasma generator and a sensing unit composed of five carbon quantum dots.

[0154] The low-temperature plasma generator is a pipeline-type electrode structure, including a T-shaped insulating tube, a metal rod and a piece of metal sheet; the T-shaped insulating tube has a diameter of about 6-10mm (such as 10mm), and a wall thickness of about 2-2mm. 3mm "T" type glass tube, the port I of the T-shaped insulating tube is the insertion port of the copper rod electrode 1, and the port II is used as the discharge gas inlet 2, there is oxygen in the discharge gas, preferably air, which is used to enter the discharge font The airway is a silicone tube with a diameter of 6-8 mm; the port III is wrapped by a copper electrode 4, and the copper rod electrode 1 and the copper electrode 4 form a pair of electrodes, and the electr...

Embodiment 2

[0159] Embodiment 2, the impact of carbon quantum dots on chemiluminescence

[0160] This example studies whether chemiluminescence is indeed produced by carbon quantum dots induced by low-temperature plasma. The experiment selects carbon quantum dots synthesized with glucose as a carbon source for research. ), the chemiluminescent signal in low-temperature plasma, and compared the chemiluminescent signals of carbon quantum dots, polyacrylic acid sodium salt, glucose and water in low-temperature plasma.

[0161] attached by figure 2 It can be seen from the curves in A that very strong and very stable chemiluminescence can be induced only when the low-temperature plasma is passed into the carbon quantum dot solution, and the chemiluminescence signals generated in other cases are very weak, and there is almost no chemiluminescence phenomenon; therefore From attached figure 2 A It can be seen that low temperature plasma and carbon quantum dots are the necessary factors to pro...

Embodiment 3

[0165] Example 3. Low temperature plasma excited carbon quantum dot chemiluminescence parallelism experiment

[0166] Taking the chemiluminescence signal of No. 1 carbon quantum dots induced by low-temperature plasma as the research object, take the synthesized carbon quantum dot stock solution and dilute it 40 times; take 1mL of the diluted carbon quantum dot solution in a 3mL quartz tube, and inject it with air Be the low-temperature plasma (air velocity: 180mL / min) of discharge gas, record the signal that low-temperature plasma causes carbon quantum dot chemiluminescence; Repeat 7 times by above-mentioned operation, obtain low-temperature plasma and cause carbon quantum dot chemiluminescence signal, 7 The signals from the second parallel experiment were processed to obtain image 3 ,Depend on image 3It can be seen that the chemiluminescence of carbon quantum dots excited by low-temperature plasma has good repeatability and the signal is very stable.

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Abstract

The invention discloses a metal ion detection method and its special sensor array. The metal ion sensor array includes a low-temperature plasma generating device and a sensing unit; oxygen exists in the discharge gas of the low-temperature plasma generating device; the sensing unit includes an aqueous solution of carbon quantum dots of five different carbon sources; carbon quantum dots of different carbon sources The dots are No. 1 carbon quantum dots with glucose as the carbon source, No. 2 carbon quantum dots with EDTA as the carbon source, No. 3 carbon quantum dots with glycerol as the carbon source, and No. 4 carbon quantum dots with histidine as the carbon source. No. 1 carbon quantum dots and No. 5 carbon quantum dots using sucrose as the carbon source; the outlet of the low-temperature plasma generator is connected to the aqueous solutions of No. 1, No. 2, No. 3, No. 4 and No. 5 carbon quantum dots through conduits. The invention uses carbon quantum dots, which are green and environmentally friendly, have simple synthesis methods, and have cheap and easily available raw materials, to collect low-temperature plasma-induced chemiluminescence signals of carbon quantum dots, and process and analyze the signals to achieve rapid detection and identification of metal ions.

Description

technical field [0001] The invention relates to a metal ion detection method and a special sensor array thereof, belonging to the field of spectrum analysis. Background technique [0002] Heavy metal ions are very harmful to the environment and human health. They generally exist in soil, water, and marine environments, and the metal ions in the environment are likely to be absorbed by animals and plants and enriched in plants and animals. And other foods, until ingested by the human body, heavy metal ions will be enriched in the human body, and they will destroy the normal protein structure and normal metabolism of the human body, which may cause fatal damage to the human body. Therefore, the detection of metal ions in the environment is a hot topic related to everyone's health. At present, many methods such as atomic absorption spectroscopy, fluorescence spectroscopy, and electrochemical methods can be used to achieve high-sensitivity detection of metal ions. However, none...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76
CPCG01N21/76G01N33/24
Inventor 那娜龙姿欧阳津
Owner BEIJING NORMAL UNIVERSITY
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