Method for detecting copper content of ferric nitrate solution

A detection method, ferric nitrate technology, is applied in the direction of analyzing the material by chemical reaction and analyzing the material by observing the influence on the chemical indicator, which can solve the problems of time-consuming and low recovery rate of copper ions, and achieve saving The effect of working time, improving accuracy, and improving work efficiency

Inactive Publication Date: 2016-06-22
YANCON YULIN FINE CHEM CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Because the precipitate of the ferric hydroxide that forms is flocculent, can have adsorption to the ion in the solution, so when filtering the test solution that forms ferric oxide precipitation, the recovery rate of copper ion in the filtrate is low, in order to ensure that the copper ion It is time-consuming to collect as much as possible into the filtrate, and the general analysis time is two and a half hours

Method used

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  • Method for detecting copper content of ferric nitrate solution
  • Method for detecting copper content of ferric nitrate solution
  • Method for detecting copper content of ferric nitrate solution

Examples

Experimental program
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Effect test

Embodiment

[0023] Embodiment: Accurately pipette 2ml, 4ml, 5ml, 10ml different amounts of ferric nitrate solution to carry out experimental detection according to the method steps of this method, and the specific results are shown in the table below.

[0024]

[0025] It can be seen from the above table that when pipetting 2ml, 4ml, 5ml, and 10ml of ferric nitrate solutions of different volumes, the method has good repeatability of the results of copper content detection in the solution, and the time consumed by the experiment can be controlled within 20 minutes. . Therefore, in the detection of the copper content in the ferric nitrate solution, the method can effectively improve the repeatability of the experiment, greatly shorten the experiment time, and fully demonstrate the simplicity and practicability of the method.

[0026] 1. Experimental principle of the present invention:

[0027] In weakly acidic solution (pH=3~4), Cu 2+ Interact with excess KI to generate CuI precipitate...

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Abstract

The invention relates to a method for detecting copper content of a ferric nitrate solution. By the adoption of the method for detecting copper ions in the ferric nitrate solution by an iodometric method, the time is greatly shortened, and the working efficiency is improved. The detection method comprises the following steps: (1) accurately transferring the ferric nitrate solution into a conical flask of 250 mL, and adding water of 30 to 50 mL; (2) titrating ammonia water with a volume ratio of 1: 1 to adjust the pH value of the ferric nitrate solution to 2.5; (3) adding a HAc-NaAc solution of 10 mL with the pH value of 3.6; (4) adding fluoride of 1.5 to 2.0 g, shaking the solution to discolor the solution from red to being colorless, wherein the fluoride is NaF; (5) adding a KI solution of 2.0 to 2.5 g, which is 2 to 3 times greater than the detection amount, to discolor the solution into dark yellow; and (6) titrating the solution to shallow yellow with a standard Na2S2O3 solution, adding a starch indicator solution of 3 mL to titrate the solution to shallow blue, and adding a NaSCN solution of 2mL to continuously titrate the solution until the blue disappears.

Description

technical field [0001] The invention relates to a method for detecting copper content in ferric nitrate solution. Background technique [0002] The original analysis method used the precipitation filtration method to eliminate the interference of iron ions, that is, in the alkaline ammonia solution, copper can form [Cu(NH 3 ) 2 ] 2+ The complex ions enter the solution, and the iron forms ferric hydroxide precipitation. The test solution is filtered, and the copper entering the filtrate is determined by the iodometric method to determine the copper content in the ferric nitrate solution. Because the precipitate of the ferric hydroxide that forms is flocculent, can have adsorption to the ion in the solution, so when filtering the test solution that forms ferric oxide precipitation, the recovery rate of copper ion in the filtrate is low, in order to ensure that the copper ion It is very time-consuming to collect as much as possible into the filtrate, and the general analysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 郑晓玮王修平周阿宝兰玲玲孙延民贺小媛
Owner YANCON YULIN FINE CHEM CO LTD
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