Detection system and method for real-time online monitoring of various heavy metal ions

A heavy metal ion and detection system technology is applied in the field of detection systems for real-time online monitoring of various heavy metal ions. Small size, easy to carry effect

Active Publication Date: 2017-06-13
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this type of method has high precision and low detection limit, the instruments used are bulky and extremely heavy, and are not easy to carry in the field; and the operation of such instruments requires a power supply of several kilowatts and a large amount of carrier gas , these harsh conditions are difficult to meet in the field, so the above analysis and testing methods can only be used for laboratory analysis, and cannot realize on-site real-time detection of water pollution.

Method used

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  • Detection system and method for real-time online monitoring of various heavy metal ions
  • Detection system and method for real-time online monitoring of various heavy metal ions
  • Detection system and method for real-time online monitoring of various heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Utilize the purchased heavy metal ion standard solution to prepare relevant heavy metal ion standard solution, Cu 2+ Standard solution concentration range is 0.1mg / L, Pb 2+ The concentration range of the standard solution is 1.0×10 -1 mg / L, Hg 2+ The concentration range of the standard solution is 1.0×10 -4 mg / L, Zn 2+ The concentration range of the standard solution is 0.15mg / L, Cd 2+ The concentration range of the standard solution is 0.006mg / L; the carrier liquid is 0.1mol / LHNO 3 solution;

[0048] (2) Connect the experimental device, including connecting the flow injection sampler, the electrochemical working system and the electrolytic cell (the glassy carbon electrode is used as the working electrode, the platinum wire electrode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode and sealed into one body) ;

[0049] (3) The heavy metal ion standard solution is passed through the main peristaltic pump, and the c...

Embodiment 2

[0052] (1) Utilize the purchased heavy metal ion standard solution to prepare relevant heavy metal ion standard solution, Cu 2+ Standard solution concentration range is 0.5mg / L, Pb 2+ The concentration range of the standard solution is 0.01mg / L, Hg 2+ The concentration range of the standard solution is 0.0006mg / L, Zn 2+ The concentration range of the standard solution is 0.10mg / L, Cd 2+ The standard solution concentration range is 0.0008mg / L; the carrier liquid is 0.05mol / L hydrochloric acid solution;

[0053] (2) Connect the experimental device, including connecting the flow injection sampler, the electrochemical working system and the electrolytic cell (the glassy carbon electrode is used as the working electrode, the platinum wire electrode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode and sealed into one body) ;

[0054] (3) The heavy metal ion standard solution is passed through the main peristaltic pump, and the carrie...

Embodiment 3

[0057] (1) Utilize the purchased heavy metal ion standard solution to prepare relevant heavy metal ion standard solution, Cu 2+ Standard solution concentration range is 0.1mg / L, Pb 2+ The concentration range of the standard solution is 0.05mg / L, Hg 2+ The concentration range of the standard solution is 0.002mg / L, Zn 2+ The concentration range of the standard solution is 0.8mg / L, Cd 2+ The concentration range of the standard solution is 5.0×10 -4 mg / L; the carrier liquid is 5mol / L H 2 SO 4 solution;

[0058] (2) Connect the experimental device, including connecting the flow injection sampler, the electrochemical working system and the electrolytic cell (the glassy carbon electrode is used as the working electrode, the platinum wire electrode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode and sealed into one body) ;

[0059] (3) The heavy metal ion standard solution is passed through the main peristaltic pump, and the carrie...

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Abstract

A detection system and method for real-time online monitoring of various heavy metal ions are provided. Heavy metal ion standard liquids with different concentrations are injected into the detection system by means of mobile sampling; standard curves of the different heavy metal ions are measured through differential pulse voltammetry; an actual water sample is subjected to online real-time detection; the actual water sample and a carrier liquid are mixed, the mixture is charged into the detection system, a detection curve of the actual water sample is acquired through differential pulse voltammetry, and the detection curve of the actual sample is compared with the standard curves to measure the types and concentrations of the heavy metals in the actual water sample. The heavy metal sensor technique based on differential pulse voltammetry according to the invention allows various heavy metal ions to be detected at the same time, has high detection sensitivity and accuracy, takes several minutes for detection, and may meet the common requirements for online and quick response.

Description

technical field [0001] The invention relates to the technical field of heavy metal detection, in particular to a detection system and method capable of real-time online monitoring of various heavy metal ions. Background technique [0002] Due to the long-term discharge of industrial production wastewater, my country's fresh water resources are seriously polluted, and more than one-fifth of the seven major water systems (the main source of my country's drinking water) are seriously polluted by heavy metal ions. Heavy metals can strongly interact with proteins and various enzymes in the human body, making them inactive, and may also accumulate in certain organs of the human body. If the human body exceeds the tolerance limit, it will cause acute poisoning, Subacute poisoning, chronic poisoning, etc., will cause great harm to the human body. For example, lead can hinder the formation of blood cells and enter the brain tissue through the blood, resulting in a decline in human i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/28G01N27/30G01N1/34A61L2/10
CPCA61L2/10G01N1/34G01N27/28G01N27/30Y02A20/20
Inventor 顾洪溪杜娟
Owner BAOJI UNIV OF ARTS & SCI
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