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Portable heavy metal lead, cadmium, and zinc sensor, preparation method thereof, and detection method

A heavy metal and sensor technology, applied in the field of analytical instruments, achieves the effects of high sensitivity, simple detection method, and convenient processing

Inactive Publication Date: 2011-11-16
HUNAN YOUNENG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned prior art, and to provide a fast, single-serve operation, easy to carry, low-cost and Simple operation, one-time use of portable heavy metal lead, cadmium and zinc sensors and their preparation process and detection method, to achieve the purpose of controlling sewage discharge and preventing pollution accidents, and can also be used for automatic detection of surface water such as river sections to ensure water environment Ecological security

Method used

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  • Portable heavy metal lead, cadmium, and zinc sensor, preparation method thereof, and detection method
  • Portable heavy metal lead, cadmium, and zinc sensor, preparation method thereof, and detection method
  • Portable heavy metal lead, cadmium, and zinc sensor, preparation method thereof, and detection method

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Embodiment 1

[0019] Embodiment 1: Product structure of the present invention

[0020] see figure 1 , The portable heavy metal lead, cadmium and zinc sensor of the present invention has three electrodes screen-printed on the polyester film substrate: one is the bismuth oxide working electrode 3, the other is the carbon auxiliary electrode 4, and the other is the silver and silver chloride reference Electrode 5; And on the polyester film substrate 1, the carbon lead-out lines 2 of the above three electrodes are screen-printed, and the front part of the carbon lead-out lines of the three electrodes and the substrates other than the three electrodes are also covered with insulating paste printing. made insulating layer.

Embodiment 2

[0021] Embodiment 2: the preparation process of the product of the present invention.

[0022] First, bismuth oxide is mixed with carbon powder, graphite powder and ink in a certain mass ratio of 1:2:2:20 or 2:3:3:18 to make a printing paste for working electrode, which is prepared by screen printing technology. It was individually printed on a polyester film with a thickness of 250 microns and dried in an oven to make a working electrode; then the carbon auxiliary electrode, silver and silver chloride reference electrodes and the carbon electrode lead-out lines of the three electrodes were printed. Then, on the substrate other than the above-mentioned working electrode, reference electrode and auxiliary electrode, and on the surface of the three electrode carbon lead wires, a layer of insulating slurry is applied to form an insulating layer, and the insulating layer covers the front part of the three electrode carbon lead wires, The rear portion of each electrode carbon lead ...

Embodiment 3

[0024] Example 3: Detection of lead, cadmium and zinc ions in river water spiked samples

[0025] When the integrated electrochemical sensor of the present invention is used, it can be connected with a multifunctional electrochemical analyzer, such as the three-electrode access line of the electrochemical workbench of the μ-AutolabIII electrochemical workstation, add a solution, and measure its electricity by voltammetry. chemical signal. The sensor of the present invention is figure 1 The screen-printed electrode is used for detecting the content of heavy metals lead, cadmium and zinc ions. Square wave voltammetry is used. First, the sensor is connected to an electrochemical workstation; Adjust the pH of the sample solution to be tested to 1.5, and prepare 10-150 μgL -1 A range of spiked solutions for lead, cadmium and zinc ions. Finally, the lower end of the sensor electrode is immersed in the solution, and the square wave voltammetry is started. According to the method o...

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Abstract

The invention relates to a portable heavy metal lead, cadmium, and zinc sensor, a preparation method thereof, and a detection method. Three electrodes are provided on a polyester film substrate through silk-screen printing. One of the electrodes is a bismuth oxide operation electrode, one is a carbon auxiliary electrode, and the last one is a silver and silver chloride reference electrode. Carbon lead-out wires of the three electrodes are provided on the polyester film substrate through silk-screen printing. The areas on the substrate, except the front portions of the three electrode lead-out wires and the three electrodes, are coated with an insulating layer formed by insulating slurry. The heavy metal sensor with silk-screen printed electrodes has advantages of simple structure, quick detection, low cost, and small sampling volume. The sensor is portable and disposable. With the sensor, simultaneous on-line monitoring of heavy metal lead, cadmium, and zinc ions in environmental water samples can be carried out. Introducing of mercury film electrode is avoided. The detection method has advantages of no pollution, high sensitivity, and good repeatability. The heavy metal sensor is an environment protecting product which ensures the ecological safety of water environment, and the detection method is an environment protecting method.

Description

technical field [0001] The invention relates to a portable heavy metal lead, cadmium and zinc sensor capable of rapidly detecting the content of heavy metal ions in water, a preparation process and a detection method thereof, and belongs to the technical field of analytical instruments. Background technique [0002] With the rapid development of modern civilization and the large-scale discharge of industrial wastewater, heavy metal pollution is becoming more and more serious, resulting in a plummet of human living space and quality of life, and at the same time induces the occurrence of a variety of major diseases, which seriously threatens human life. The nervous system is most vulnerable to lead damage. Due to the late maturity of the blood-brain barrier, the central nervous system is relatively fragile, and the excretory function is not perfect, so it is vulnerable to lead damage. When children ingest a large amount of lead compounds at one time or in a short period of ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403G01N27/48
Inventor 纪效波李叙卡瑞格·爱德华·巴克斯菲利浦·M·哈兰姆
Owner HUNAN YOUNENG HIGH TECH
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