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Cuprous ion selective electrode and cuprous ion measuring method thereof

A cuprous ion and electrode selection technology, which is used in the field of chemical analysis to achieve the effect of meeting application needs

Inactive Publication Date: 2014-01-29
GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, there is no ion-selective electrode for measuring cuprous ions. The existing ion-selective electrodes for copper ions are all aimed at divalent copper ions. For example, the patent CN200910113972.0 discloses a copper (II ) Ion-selective electrode, which is mainly used to solve Cu in hydrometallurgical wastewater 2+ Analysis
[0005] Therefore, there is currently no ion-selective electrode for measuring cuprous ions in acidic etching solutions for PCBs.

Method used

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  • Cuprous ion selective electrode and cuprous ion measuring method thereof
  • Cuprous ion selective electrode and cuprous ion measuring method thereof
  • Cuprous ion selective electrode and cuprous ion measuring method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1. Electrode preparation

[0038] Cuprous sulfide powder and β-Ag 2 S-type silver sulfide powder is placed in a mold with a mass ratio of 40:60 for tableting to form a solid sheet. then press figure 1 structure, assembled into electrodes.

[0039] 2. Standard curve preparation

[0040] Cu will be prepared separately in five 100mL volumetric flasks + Concentration is 10 -2 mol / L, 10 -3 mol / L, 10 -4 mol / L, 10 -5 mol / L, 10 -6 mol / L standard solution, 10mL of 2mol / L potassium chloride solution as ionic strength regulator. Pour the above five standard solutions into clean and dry beakers respectively, and put in a stirring bar. The prepared cuprous ion selective electrode was inserted into the Cu + Place the beaker of the standard solution on a magnetic stirrer and stir steadily for 2 minutes, then let it stand for 1 minute, and read the potential value E after the potential is stable. The measurement is carried out in order from lean to rich. ΔφM and K are obta...

Embodiment 2

[0047] 1. Electrode preparation

[0048] Cuprous sulfide powder and β-Ag 2 S-type silver sulfide powder is placed in a mold with a mass ratio of 60:40 for tableting to form a solid sheet. then press figure 1 structure, assembled into electrodes.

[0049] 2. Standard curve preparation

[0050] Cu will be prepared separately in five 100mL volumetric flasks + Concentration is 10 -2 mol / L, 10 -3 mol / L, 10 -4 mol / L, 10 -5 mol / L, 10 -6 mol / L standard solution, 10mL of 2mol / L potassium chloride solution as ionic strength regulator. Pour the above five standard solutions into clean and dry beakers respectively, and put in a stirring bar. The prepared cuprous ion selective electrode was inserted into the Cu + Place the beaker of the standard solution on a magnetic stirrer and stir steadily for 2 minutes, then let it stand for 1 minute, and read the potential value E after the potential is stable. The measurement is carried out in order from lean to rich. ΔφM and K are obta...

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Abstract

The invention discloses a cuprous ion selective electrode. The cuprous ion selective electrode is a mixed crystal membrane electrode with a selective sensitive membrane consisting of cuprous sulfide and silver sulfide, wherein the weight of the cuprous sulfide accounts for 40-60% of the total weight of the selective sensitive membrane, and the weight of the silver sulfide accounts for 60-40% of the total weight of the selective sensitive membrane. The cuprous ion selective electrode can be used for quickly and accurately measuring the activity of cuprous ions, the needed time is only several minutes, the relative error is smaller than or equal to 10%, the detection limit is 1*10-6 to 1*10-2 mol / L, and the actual application need can be well met.

Description

technical field [0001] The invention relates to the field of chemical analysis, in particular to a cuprous ion selective electrode and a method for measuring cuprous ions. Background technique [0002] The cuprous ion content of PCB acid etching solution should be monitored during use, so as to control the addition of oxidant (for example: hydrogen peroxide), but now it takes a long time to measure cuprous ion by potassium permanganate titration method. And does not apply to automatic adjustment devices. [0003] The ion-selective electrode has the ability to convert the activity of a specific ion in the solution into a certain potential, and its potential is linearly related to the logarithm of the activity of a given ion in the solution. It has the advantages of simple and rapid operation, high selectivity, accurate results, and is not affected by the color and turbidity of the test solution, etc. It is especially suitable for continuous automatic detection and on-site an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/333
Inventor 廖悦鉴吴阳东张素娟
Owner GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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