A heavy metal detection device and detection method thereof

A detection device and heavy metal technology, applied in the field of sensors, can solve the problems of poor long-term stability and poor measurement accuracy, achieve the effect of reinforcement firmness, optimized detection process, and long-term stability

Active Publication Date: 2020-06-16
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of poor measurement accuracy and poor long-term stability of heavy metal sensors in the prior art

Method used

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  • A heavy metal detection device and detection method thereof

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Embodiment 1

[0035] Such as figure 1 As shown, the present invention provides a heavy metal detection device integrating photocatalytic reduction and ultrasonic-assisted heavy metal detection device.

[0036] Such as figure 1 As shown, the heavy metal detection device includes: a sensor device, a reaction pool device 2, an auxiliary system, a potentiostat module 4, a signal processing module 5, a single-chip microcomputer module 6 and a display storage module 7.

[0037] The sensor device is arranged in the reaction pool device 2, and the reaction pool device 2 is used to contain the liquid to be tested containing heavy metal ions. Described sensor device comprises working electrode 11, described reference electrode 12 and described counter electrode 13, and described working electrode 11, reference electrode 12 and described counter electrode 13 are connected with described potentiostat, and described working electrode 11 is A titanium sheet loaded with a titanium dioxide nanotube array...

Embodiment 2

[0047] The present invention provides a method for preparing a heavy metal detection device, the method for preparing a working electrode 11 of a sensor device in the heavy metal detection device comprises the following steps:

[0048] Step S1: Before using the two-electrode method for anodic oxidation reaction, polish the titanium sheet substrate in a chemical polishing solution, and ultrasonically clean the polished titanium sheet substrate in acetone, absolute ethanol, and deionized water for 15 to 25 minutes respectively, Blow dry and set aside. In a preferred embodiment, the polishing liquid includes HF, HNO with a volume ratio of 1:4:5 3 and H 2 O.

[0049] Step S2: Carry out anodic oxidation reaction by two-electrode method, put the titanium substrate into the electrolyte, and place a platinum wire on both sides of the titanium substrate, which is conducive to the uniform growth of titanium dioxide nanotubes on the surface of the titanium substrate. In this embodimen...

Embodiment 3

[0055] This embodiment provides a detection method of a heavy metal detection device, the detection method of the heavy metal detection device includes:

[0056] Step 1: Connect the working electrode 11, the reference electrode 12 and the counter electrode 13 of the sensor device to the potentiostat module 4 of the heavy metal detection device through wires.

[0057] Step 2: Put the liquid to be tested into the reaction cell device 2, immerse the working electrode 11, the reference electrode 12 and the counter electrode 13 in the solution to be tested, turn on the excitation light source 31 and the ultrasonic device 32 to digest the liquid to be tested, so that The heavy metal ions complexed by the organic matter are fully released, and the heavy metal ions are photocatalytically reduced to zero-valent heavy metal simple substances on the surface of the working electrode 11 , and deposited on the surface of the working electrode. In this embodiment, the liquid to be tested is ...

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Abstract

The invention relates to the technical field of sensors and discloses a heavy metal detection device and a detection method. The heavy metal detection device comprises a sensor device, wherein the sensor device is arranged in a reaction tank device for containing a to-be-detected liquid containing heavy metal ions; the sensor device comprises a working electrode, a reference electrode and a counter electrode, and the working electrode is a titanium sheet loaded with a titanium dioxide nanotube array layer on the surface; the sensor device is connected with a potentiostat; the potentiostat is connected with a signal processing module and a single-chip microcomputer module, and the single-chip microcomputer module is connected with a display storage module; an auxiliary system comprises at least one exciting light source and at least one ultrasonic device. The heavy metal detection device and the detection method have the benefit as follows: the problems of poor measurement accuracy andlong-term stability of heavy metal sensors in the prior art are solved.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a heavy metal detection device and a detection method thereof. Background technique [0002] With the development of social industry, the living environment of human beings is gradually deteriorating, and the pollution of heavy metal ions in water is particularly prominent. Heavy metal ions, such as lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu), arsenic (As), etc., will cause great harm to the human body and the environment even if they exist in trace amounts. The most commonly used in heavy metal detection is anodic stripping voltammetry (AnodicStripping Voltammetry, ASV), which is an important electrochemical analysis method. ASV testing consists of three steps: electrodeposition, dissolution, and cleaning. First, the heavy metal ions are reduced to simple metal on the surface of the working electrode under constant potential, and after standing for a period of time, the heavy met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/30G01N1/44
CPCG01N1/44G01N27/30G01N27/48
Inventor 廖建军林仕伟吴雪梅
Owner HAINAN UNIV
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