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Heavy metal ion detection device and preparation method thereof

A technology of heavy metal ions and detection devices, applied in ion implantation plating, metal material coating process, coating and other directions, can solve the problems of inability to quantitatively detect the detection process, low detection sensitivity, long detection time, etc., and reach the detection concentration limit Low, high detection sensitivity, rapid response effect

Inactive Publication Date: 2010-10-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a heavy metal ion detection device and its preparation method to solve the problems of low detection sensitivity, incapable of quantitative detection and cumbersome detection process, long detection time, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) At room temperature, 2g polystyrene (polymerization degree is 1600) solid is stirred and dissolved in 18g mass ratio with the rotating speed of 50rpm / min N, N-dimethylformamide and In the mixed solvent of tetrahydrofuran, obtain the polystyrene solution that mass fraction is 10%;

[0023] (2) Under the conditions of room temperature and humidity of 40%, a polystyrene solution with a mass fraction of 10% was input to the spinneret at a flow rate of 4mL / h, and the spinneret was connected to a 20kV power supply for electrospinning prepare fibers;

[0024] (3) the fiber that spins out is deposited on the electrode of quartz crystal microbalance, and the distance between receiving electrode and spinneret is 15cm;

[0025] (4) The fiber deposited on the quartz crystal microbalance electrode is sprayed with a gold film with a vacuum metal sputtering instrument, and the spraying time is 1 min;

[0026] (5) Put the electrode of the quartz crystal microbalance sprayed with ...

Embodiment 2

[0029] (1) At room temperature, 3g of polyaniline (polymerization degree is 300) is stirred and dissolved in 17g of N,N-dimethylformamide with a magnetic stirrer at a speed of 250rpm / min, to obtain a polyaniline with a mass fraction of 15%. Aniline solution;

[0030] (2) Under the conditions of room temperature and humidity of 50%, a polyaniline solution with a mass fraction of 15% was input to the spinneret at a flow rate of 2mL / h, and at the same time, the spinneret was connected to an 18kV power supply for electrospinning preparation fiber;

[0031] (3) The fiber spun is deposited on the electrode of the quartz crystal microbalance, and the distance between the receiving electrode and the spinneret is 10cm;

[0032] (4) The fiber deposited on the quartz crystal microbalance electrode is sprayed with a silver film with a vacuum metal sputtering instrument, and the spraying time is 2min;

[0033] (5) Put the electrode of the quartz crystal microbalance sprayed with fiber an...

Embodiment 3

[0036] (1) At room temperature, 6g of polyethyleneimine (polymerization degree is 500) is stirred and dissolved in 14g of dichloromethane with a magnetic stirrer at a speed of 500rpm / min to obtain polyethyleneimine with a mass fraction of 30%. imine solution;

[0037] (2) Under the condition of room temperature and humidity of 60%, the polyethyleneimine solution with a mass fraction of 30% is input to the spinneret at a flow rate of 6mL / h, and the spinneret is connected to a 60kV power supply for Electrospinning to prepare fibers;

[0038] (3) the fiber that spins out is deposited on the electrode of quartz crystal microbalance, and the distance between receiving electrode and spinneret is 30cm;

[0039] (4) Copper film is sprayed on the fiber deposited on the quartz crystal microbalance electrode with a vacuum metal sputtering apparatus, and the spraying time is 10min;

[0040] (5) The electrode of the quartz crystal microbalance sprayed with fiber and gold film is put into...

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Abstract

The invention provides a heavy metal detection device and a preparation method thereof. The device comprises a quartz crystal microbalance, and is characterized in that: polymer fibers are deposited on the electrode of the quartz crystal microbalance; a metal film is sprayed on the polymer fibers; and a sensing material is covered on the metal film. The preparation method is characterized by comprising the following steps: dissolving a spinning polymer raw material in a solvent to obtain an electrospinning material; performing electrostatic spinning by using the electrospinning material; depositing the fibers onto the electrode of the quartz crystal microbalance; spraying the metal film on the fibers; and placing the electrode of the quartz crystal microbalance in a container containing solution of the sensing material for soaking, and taking the electrode out to obtain the heavy metal ion detection device. The device has the advantages of high sensitivity and accurate and quantitative detection.

Description

technical field [0001] The invention relates to a heavy metal ion detection device and a preparation method thereof, belonging to the field of metal ion detection. Background technique [0002] Traditional heavy metal ion detection methods such as atomic absorption spectrometry, inductively coupled plasma emission spectrometry, etc. require pretreatment of samples, and the detection process is cumbersome. It is difficult to adapt to actual needs. Although the heavy metal ion immunoassay method that appeared in recent years overcomes the shortcomings of the above-mentioned traditional detection methods to a certain extent, the immunoassay method can only detect qualitatively, not quantitatively. Some foreign experts and scholars have used quartz crystal microbalance as a research platform to cover sensitive materials on electrodes in the form of solid films to prepare sensors for detecting heavy metal ions, but they cannot overcome the shortcoming of low sensitivity. Heavy ...

Claims

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Application Information

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IPC IPC(8): G01N5/02C23C14/34C23C14/20
Inventor 丁彬孙敏俞建勇孙刚
Owner DONGHUA UNIV
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