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Method for measuring copper content of anode copper through automatic potentiometric titrator

A potentiometric titration and anode copper technology, applied in the direction of material electrochemical variables, etc., to achieve the effect of improving analysis accuracy, good economic benefits and industrial application value, and less reagents

Inactive Publication Date: 2018-09-21
BAIYIN NONFERROUS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the automatic potentiometric titrator in the determination of high content copper

Method used

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  • Method for measuring copper content of anode copper through automatic potentiometric titrator
  • Method for measuring copper content of anode copper through automatic potentiometric titrator
  • Method for measuring copper content of anode copper through automatic potentiometric titrator

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Embodiment Construction

[0032] The present invention will be described in detail below in combination with specific embodiments.

[0033] The present invention provides a kind of method that automatic potentiometric titrator measures the content of copper in anode copper, and this method is carried out according to following steps:

[0034] Step 1: Preparation of sodium thiosulfate standard solution: Weigh 250g of sodium thiosulfate, put it in a 1000mL beaker and add water to dissolve it, add 2g of anhydrous sodium carbonate to the beaker after dissolving, and transfer the solution in the beaker into a 10L brown reagent bottle and dilute to 10L with distilled water, add 1mL chloroform to the brown reagent bottle, shake it well, and let it stand for more than 10 days;

[0035] Step 2: Treatment of pure copper sheet: put the pure copper sheet with a mass fraction of 99.97% into slightly boiling glacial acetic acid (1+4) and boil for 1 min, rinse it twice with water and absolute ethanol after taking it ...

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Abstract

The invention belongs to the technical field of industrial analysis, and particularly relates to a method for measuring copper content of anode copper through an automatic potentiometric titrator. Themethod comprises the steps that step 1: the preparation of a sodium hyposulfite standard solution; step 2, the processing of a pure copper piece; step 3, 30 minutes' preheating of the potentiometrictitrator; step 4, the calibration of the sodium hyposulfite standard solution; step 5, the analysis of actual sample anode copper. The reaction principle is 2Cu2+ + 4I-=2CuI / + I2, I2 + I-=I3- and 2S2O32- + I3-= S4O62- + 3I-. The end point of titration does need to be indicated depending on the variation of the color of an indicator, the kinds of analyzed sample is more complicated, for cases in which end point indicating is difficult, with color, cloudy or an appropriate indicator cannot be find at all, the titration is acute and has small errors, compared with a normal titration method in which color changing of the indicator is observed, to-be-measured elements can be more conveniently and accurately measured, the analysis precision is improved, artificial errors are reduced, indicatorsare not needed, needed reagent is less, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of industrial analysis, and in particular relates to a method for measuring copper content in anode copper by an automatic potentiometric titrator. Background technique [0002] Ordinary titration methods rely on the color change of the indicator to indicate the titration end point. If the solution to be tested is colored or turbid, it is difficult to indicate the end point, or no suitable indicator can be found at all. [0003] Potentiometric titration is to indicate the end point of titration by the sudden jump of electrode potential. When performing potentiometric titration, an indicating electrode and a reference electrode are inserted into the measured solution to form a working battery. With the addition of the titrant and the progress of the chemical reaction, the measured ion concentration changes continuously, and the potential of the indicating electrode also changes accordingly. Before and after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42
CPCG01N27/42
Inventor 马德莉王学虎焦晓斌
Owner BAIYIN NONFERROUS GROUP
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