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A heavy metal detector and its electrolytic cell

A heavy metal and electrolytic cell technology, applied in the field of heavy metal detection, can solve the problems of inability to dissolve heavy metals and reduce detection accuracy, and achieve the effect of high dissolution and high precision

Inactive Publication Date: 2019-06-25
北京华科天宇环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this kind of heavy metal detector is applied with reverse voltage to dissolve heavy metals, it cannot completely dissolve all the heavy metals enriched in the electrodes, which reduces the detection accuracy.

Method used

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  • A heavy metal detector and its electrolytic cell
  • A heavy metal detector and its electrolytic cell
  • A heavy metal detector and its electrolytic cell

Examples

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Effect test

Embodiment 1

[0038] Embodiment one: a kind of heavy metal detection electrolytic cell, such as figure 1 As shown, it includes a microcontroller, a constant voltage generator, a differential amplifier, an auxiliary electrode, a reference electrode, a working electrode and a conversion circuit, and the microcontroller converts a digital signal into a voltage signal through a D / A converter to control the constant voltage The generator works, the constant voltage generator provides voltage for the conversion circuit, the conversion circuit provides voltage or current to the working electrode, auxiliary electrode and reference electrode, and outputs the voltage signal to the differential output device, and the differential amplifier passes through the A / D converter The voltage signal is converted into a digital signal and sent to the microcontroller to complete the measurement of the heavy metal content in the sampled water.

[0039] figure 2 As shown in the schematic diagram of the conversion ...

Embodiment 2

[0047] Embodiment two: a kind of heavy metal detector, comprises the electrolytic cell of embodiment one, as Image 6 As shown, it also includes a digester, a waste liquid recovery device and a water circulation system. The water circulation system can control the sampled water body so that it can be digested by the digester and then detected by the heavy metal detection electrolytic cell, so as to achieve For the purpose of detecting heavy metals in water, after the detection, the water circulation system can discharge the sampled water body to the waste liquid recovery device, and the water circulation system can control the sampled water body so that it can be digested through the digester, and then passed to the electrolytic cell for heavy metal concentration determination after digestion. After the measurement is completed, it is discharged to the waste liquid recovery device for waste liquid recovery and treatment.

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Abstract

The invention discloses a heavy metal detection electrolytic cell. In an enrichment phase of electrochemical detection, a conversion circuit outputs constant voltage to an auxiliary electrode; in a dissolution phase of electrochemical detection, the conversion circuit outputs current to a working electrode; a reference electrode inputs varying voltage into a differential amplifier; a microcontroller can carry out analysis treatment on a function of the varying voltage and time and can calculate the value of the heavy metal content according to the nernst equation; the conversion circuit firstly outputs the constant voltage to the auxiliary electrode during detection, heavy metals in a water body are enriched on the electrode and the then the microcontroller controls the conversion circuit to output the current to the working electrode; the reference electrode inputs the varying voltage into the differential amplifier; and the microcontroller can carry out analysis treatment on the function of the varying voltage and time to achieve the target of measuring the heavy metal content in the water body. Compared with a traditional stripping voltammetry, the heavy metal detection electrolytic cell has relatively high precision.

Description

technical field [0001] The invention relates to the field of heavy metal detection, in particular to a heavy metal detector and an electrolytic cell thereof. Background technique [0002] Heavy metal pollution has become an important factor affecting human health. Heavy metals such as lead, cadmium, mercury, and arsenic are enriched in the surrounding environment of humans due to the development of industrial activities, and enter the human body through the atmosphere, water, and food. Accumulation in certain organs of the human body can cause chronic poisoning and endanger human health. Most of the heavy metal detectors in the prior art use stripping voltammetry (also known as reverse stripping polarography). Then change the potential of the electrode to dissolve the substance enriched on the electrode again, and perform quantitative analysis according to the voltammetry curve obtained during the dissolution process. [0003] The Chinese patent with application number CN2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/28
CPCG01N27/28G01N27/48
Inventor 谢道东
Owner 北京华科天宇环保科技有限公司
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