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Copper developing solution, and preparation method and application thereof

A technology of chromogenic liquid and solution, which is applied in the direction of analysis, instruments, and measuring devices through the chemical reaction of materials, which can solve the problems of not reaching the ppb level of the battery, and achieve the effects of low cost, environmental friendliness, and avoiding interference

Pending Publication Date: 2020-06-02
YINGDE KEHENG NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent uses ammonium citrate as an auxiliary, and needs to detect the copper content through a spectrophotometer. At the same time, the concentration range of copper detected is 0.4-4.0ug / mL, which does not meet the ppb level requirements of the battery industry

Method used

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  • Copper developing solution, and preparation method and application thereof
  • Copper developing solution, and preparation method and application thereof
  • Copper developing solution, and preparation method and application thereof

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Embodiment 1

[0038] A copper chromogenic solution, the copper chromogenic solution comprises dicyclohexanone oxalyldihydrazone, sodium acetate, ammonium acetate, acetic acid and ammonium citrate, and the concentration of the dicyclohexanone oxalyldihydrazone is 1.5mg / mL, The concentration of sodium acetate is 0.075 g / mL, the concentration of ammonium acetate is 0.075 g / mL, and the concentration of ammonium citrate is 1 mg / mL.

[0039] The preparation method of above-mentioned copper chromogenic liquid, comprises the following steps:

[0040] (1) Take 0.3g of dicyclohexanone oxalyldihydrazone and dissolve it completely in 100mL of ethanol to obtain a solution of dicyclohexanone oxalyldihydrazone with a concentration of 3mg / mL;

[0041] (2) 15g of sodium acetate and 15g of ammonium acetate were completely dissolved in 100mL of pure water with a total solute concentration of 0.3g / mL, and then 0.2g of ammonium citrate was added to make the concentration 2mg / mL to obtain an auxiliary solution; ...

Embodiment 2

[0046] A copper chromogenic solution, the copper chromogenic solution comprises dicyclohexanone oxalyldihydrazone, calcium acetate, ammonium acetate, acetic acid and ammonium citrate, the concentration of the dicyclohexanone oxalyldihydrazone is 2mg / mL, acetic acid The calcium concentration was 0.05 g / mL, the ammonium acetate concentration was 0.075 g / mL, and the ammonium citrate concentration was 0.5 mg / mL.

[0047] The preparation method of above-mentioned copper chromogenic liquid, comprises the following steps:

[0048] (1) Take 0.4g of dicyclohexanone oxalyldihydrazone and completely dissolve it in 100mL of ethanol to obtain a solution of dicyclohexanone oxalyldihydrazone with a concentration of 4mg / mL;

[0049] (2) Take 10g of calcium acetate and 15g of ammonium acetate and completely dissolve them in 100mL of pure water with a total solute concentration of 0.25g / mL, then add 0.1g of ammonium citrate to make the concentration 1mg / mL to obtain an auxiliary solution;

[0...

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Abstract

The invention belongs to the technical field of copper qualitative detection, and particularly relates to a copper developing solution, and a preparation method and an application thereof,. The copperdeveloping solution comprises bis(cyclohexanone)oxaldihydrazone, acetate, acetic acid and citrate. When the copper developing solution is used for carrying out copper qualitative detection on a new energy battery material, the detection limit can reach 50 ppb; the copper developing solution does not develop color for low-concentration Fe, Ni, Co and other ions, so that the interference of other ions on copper developing can be effectively avoided; and the method for carrying out copper qualitative detection on the new energy battery material by using the copper developing solution has the advantages of no damage, simplicity, convenience, rapidness, low cost and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of copper qualitative detection, and in particular relates to a copper chromogenic solution and a preparation method and application thereof. Background technique [0002] At present, new energy battery materials mainly include lithium cobalt oxide, lithium manganese oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, graphite, silicon carbon negative electrode, conductive carbon black, carbon nanotubes, etc. When the battery material is mixed with iron , copper, chromium, nickel and other metal elements impurities, after the voltage reaches the oxidation-reduction potential of these metal elements during the battery manufacturing process or use, these metal elements may be reduced to metal elements, and the metal elements accumulate to a certain extent. The hard edges and corners of the deposited metal will pierce the separator, causing the battery to self-discharge, affecting per...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78G01N2021/775
Inventor 简健明范江史镇洪汪云峰邓伟杰赵靖弘蓝秋明吴建华万国江
Owner YINGDE KEHENG NEW ENERGY TECH CO LTD
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