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Method for measuring chloride ion in acidity plating solution

A technology of acid plating solution and determination method, which is applied in the field of chemical analysis, can solve the problems of cumbersome methods, expensive prices, and many steps, and achieve the effects of quick operation, simple method, and low price

Inactive Publication Date: 2014-06-11
AMPHENOL TIANJIN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are either only aimed at the determination of chloride ions in a certain acid bath, or use expensive precision analytical instruments, or the methods are cumbersome and have many steps.
There is no simple analysis and determination method applicable to the content of chloride ions in simple salt (containing copper and nickel) electroplating solutions

Method used

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  • Method for measuring chloride ion in acidity plating solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1 method

[0051] Take 60ml of acidic copper-containing plating solution, add solid sodium hydroxide and stir thoroughly with a glass rod, adjust the pH value of the plating solution to greater than 9, and then filter and remove the precipitate generated in the plating solution. Take 25ml from the filtered plating solution, and adjust the pH value to 9-10 with 10% dilute nitric acid solution.

[0052] In the plating solution, add 1ml of 5% potassium chromate, and titrate with 0.05mol / L silver nitrate solution until the chloride ions are completely precipitated, that is, a white precipitate appears until the precipitate turns slightly brick red as the end point. If the silver nitrate solution is used too much, add 2% ferric ammonium sulfate 2ml, and use 0.1mol / L potassium thiocyanate solution to titrate the excess silver nitrate to the red end point. For the specific steps of the determination method, see figure 1 .

[0053] According to the amount of titration solutio...

Embodiment 2

[0059] 1 method

[0060] Take 100ml of acidic nickel-containing plating solution, add solid sodium hydroxide and stir thoroughly with a glass rod, adjust the pH value of the plating solution to greater than 9, and then filter and remove the precipitate generated in the plating solution. Take 25ml from the filtered plating solution, and adjust the pH value to 9-10 with 15% dilute nitric acid solution.

[0061] In the plating solution, add 1ml of 10% potassium chromate, and titrate with 0.1mol / L silver nitrate solution until the chloride ions are completely precipitated, that is, a white precipitate appears until the precipitate turns slightly brick red as the end point. If the silver nitrate solution is used too much, add 2% ferric ammonium sulfate 2ml, and use 0.1mol / L potassium thiocyanate solution to titrate the excess silver nitrate to the red end point. For the specific steps of the determination method, see figure 1 .

[0062] According to the amount of titration soluti...

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Abstract

The invention provides a method for measuring chloride ions in an acidity plating solution. The method comprises the steps of adding sodium hydroxide in the acidity plating solution, adjusting the pH value of the plating solution to alkalinity, removing precipitate generated in the plating solution, adjusting the pH value of a certain amount of filtered plating solution to be 9-10 with nitric acid, titrating with a silver nitrate solution to a terminal point by using potassium chromate as an indicator, titrating with potassium rhodanide by using ammonium ferric sulfate as the indicator when the silver nitrate solution is excessive, and calculating the content of chloride ions in the acidity plating solution. By adopting the method for measuring the chloride ion in the acidity plating solution, the content of the chloride ions in the acidity plating solution can be rapidly and accurately measured on the scene and in a small-and-medium size lab, an expensive analytical instrument is not required, the method is convenient and rapid, and has the time-saving effect, and the analysis result is accurate and reliable. Reaction measuring substances are all regular chemicals, low in cost and toxicity and convenient to manage and use.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for measuring chloride ions in an acidic plating solution. Background technique [0002] Electroplating (Electroplating) is a process that uses the principle of electrolysis to attach a layer of metal film to the surface of metal or other materials, which can effectively prevent metal oxidation (such as rust), improve wear resistance, conductivity, reflectivity and Improve the appearance and so on. Among them, the composition of the electroplating solution used in electroplating has a very important influence on the structure of the electroplating layer. [0003] The electroplating solution usually referred to is a conductive solution containing metal salts and other chemicals, which has the characteristics of expanding the cathodic current density range of the metal, improving the appearance of the coating, and increasing the stability of the solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 霍明沈正状
Owner AMPHENOL TIANJIN ELECTRONICS
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