Anodic stripping voltammetry detection of mn 2+ Manganese counter electrode, electrolyte solution and detection method

A technology of anodic stripping voltammetry and electrolyte solution, applied in the field of manganese counter electrode for accurate detection of Mn2+ ions, continuous anodic stripping voltammetry, and detection of Mn2+ ions by anodic stripping voltammetry, to prolong active life, improve repeatability, reduce The effect of the maintenance cycle

Active Publication Date: 2021-06-22
SHANGHAI YIDIAN SCI INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the anodic stripping voltammetry detection Mn in the prior art. 2+ ions, the platinum counter electrode surface MnO 2 generation and accumulation problems, providing a long service life, which can avoid the Mn to be measured 2+ The ions undergo an oxidation reaction on the counter electrode to form MnO 2 Determination of Mn by Anodic Stripping Voltammetry Attached to Platinum Wire 2+ ionic manganese counter electrode

Method used

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  • Anodic stripping voltammetry detection of mn <sup>2+</sup> Manganese counter electrode, electrolyte solution and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Insert the treated glassy carbon electrode, silver / silver chloride reference electrode, and manganese counter electrode with electrolyte solution into the corresponding electrode sockets;

[0067] 2. Insert the above-mentioned three-electrode system into a measuring cup filled with mercury-plating solution, connect it with a portable heavy metal meter, and perform pre-mercury plating;

[0068] 3. Rinse the three-electrode system with pre-coated mercury film with deionized water and set aside;

[0069] 4. Take three clean 100mL volumetric flasks, add 5mL each of manganese electrolyte solution, pipette 40μL, 50μL, and 100μL of 100mg / L divalent manganese standard solution into the three volumetric flasks, and add 0.5ml of reducing agent solution , diluted to the mark, prepared into 40μg / L, 50μg / L, 100μg / L series of standard solutions, respectively pipette 20mL into the measuring cup;

[0070] 5. Place the three-electrode system in turn in the measuring cup filled with ...

Embodiment 2

[0073] 1. Take a clean 500mL volumetric flask, add 25mL of manganese electrolyte solution, 2.5ml of reducing agent solution, and add 0.5ml of 1mg / L divalent manganese standard solution to dilute to the mark, mix well, that is, 1μg / L divalent manganese Valence manganese ion measurement solution;

[0074] 2. Pipette 20mL into the measuring cup for later use;

[0075] 3. Put the three-electrode system in the measuring cup and measure 11 times continuously. L, 0.92 μg / L, 1.07 μg / L, 1.13 μg / L, 1.42 μg / L, 1.07 μg / L, resulting in a detection limit of 0.52 μg / L.

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Abstract

The invention provides a kind of anode stripping voltammetry detection Mn 2+ Manganese counter electrode, electrolyte solution and detection method, the electrode includes a glass tube whose diameter matches the corresponding electrode socket of the electrode seat of the heavy metal instrument, one end of the glass tube is sintered with a ceramic sand core as a salt bridge, and the A platinum wire with a length of 5-6 cm is packaged in the glass tube; a liquid filling hole for adding an electrolyte solution is opened on the side wall of the glass tube. The electrolytic solution includes each component of the following concentrations relative to the final mixed solution: (0.1-1.0) mol / L borax solution, (0.3-0.8) mol / L sodium hydroxide solution or potassium hydroxide solution, (1.0 ~2.0)mol / L ammonium chloride solution and (100~200)ml / L concentrated ammonia water.

Description

technical field [0001] The invention belongs to Mn in water body 2+ The technical field of analysis and determination relates to the continuous and accurate detection of Mn by anodic stripping voltammetry 2+ The method of ion; Specifically, it is a kind of anodic stripping voltammetry to detect Mn 2+ Ionic manganese counter electrode, electrolyte solution and detection method Background technique [0002] Manganese is widely distributed in the environment, and the content of manganese in the earth's crust is about 0.1%. Manganese is an essential trace element for the human body. The life activities of all living organisms on the earth are closely related to manganese. However, if there is too much manganese in the human body, a series of neurological hazards will occur. [0003] The special electronic structure of the manganese atom makes its outermost and second outermost electrons have the possibility to become valence electrons, which makes manganese have multiple vale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
CPCG01N27/48
Inventor 迟屹君
Owner SHANGHAI YIDIAN SCI INSTR
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