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Method for determining aluminum content in iron-aluminum-manganese alloy through titrimetric method

A technology of manganese alloy and aluminum content, which is applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem of incomplete solution separation, affecting the accuracy and authenticity of results, Interfering elements can not be completely eliminated and other problems, so as to shorten the measurement time, facilitate the operation, and reduce the operation steps.

Inactive Publication Date: 2016-10-05
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper selection of reagents and media will result in incomplete separation of the solution and incomplete elimination of interfering elements, thus affecting the accuracy and authenticity of the results.

Method used

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  • Method for determining aluminum content in iron-aluminum-manganese alloy through titrimetric method
  • Method for determining aluminum content in iron-aluminum-manganese alloy through titrimetric method
  • Method for determining aluminum content in iron-aluminum-manganese alloy through titrimetric method

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Experimental program
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Effect test

Embodiment 1

[0061] The samples were taken with known iron content 82 aluminum 15 manganese 3 Standard product (wherein iron 82.07wt%, aluminum 14.94wt%, manganese 2.99wt%), measure the content of aluminum wherein with the method of the present invention, concrete determination method step is as follows:

[0062] 1. Standard substance analysis

[0063] 1) Take the standard substance, as shown in Table 1:

[0064] Table 1

[0065] Standard substance name

Aluminum content (%)

Sample weight (g)

pure aluminum

99.99

0.1016

pure aluminum

99.99

0.1096

[0066] 2) Dissolution of standard substances

[0067] Weigh 0.1000g of pure aluminum into a beaker, cover with a watch glass, add 5ml (1+1) hydrochloric acid, heat to 80-100°C to dissolve the sample, then add 5ml of hydrogen peroxide, heat to 500-800°C to drive out the solution Hydroxide in the solution, cool the solution, move it into a 100ml volumetric flask, dilute it with deionized water,...

Embodiment 2

[0096] The samples were taken with known iron content 25 aluminum 45 manganese 30 Standard product (wherein iron 25.00wt%, aluminum 45.00wt%, manganese 30.00wt%), measure the content of wherein aluminum with the method of the present invention, concrete assay method step is as follows:

[0097] 1. Standard substance analysis

[0098] 1) Take standard substance, as shown in Table 4:

[0099] Table 4

[0100] Standard substance name

Aluminum content (%)

Sample weight (g)

pure aluminum

99.99

0.1026

pure aluminum

99.99

0.1086

[0101] 2) Dissolution of standard substances

[0102] Weigh 0.1000g of pure aluminum into a beaker, cover with a watch glass, add 5ml (1+1) hydrochloric acid, heat to 80-100°C to dissolve the sample, then add 5ml of hydrogen peroxide, heat to 500-800°C to drive out the solution Hydrogen peroxide in the solution, cool the solution, move it into a 100ml volumetric flask, dilute it with deionized water, a...

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Abstract

A method for determining aluminum content in iron-aluminum-manganese alloys by titration, comprising the following steps: preparing an aluminum standard solution and measuring the titer of the standard solution aluminum; weighing a sample to be tested in a beaker, adding hydrochloric acid and hydrogen peroxide and heating Dissolve completely, add sodium hydroxide solution to it to form hydroxide precipitate, after heating for several minutes, cool the solution to room temperature, add deionized water to constant volume, shake well; cool, transfer to volumetric flask, dry filter; accurately divide Take the filtrate in a conical flask, add pure copper bottom solution, hydrochloric acid, EDTA solution, sodium acetate solution, heat to boil, add hexamethylenetetramine solution, PAN indicator immediately after taking it off, use concentrated zinc standard solution while hot After the titration is close to the end point, use dilute zinc standard solution to titrate to the end point without counting, add solid sodium fluoride and solid boric acid, shake well, heat to boil, take it off and continue to titrate with dilute zinc standard solution until the solution turns from green to purple as the end point , record the volume of dilute zinc standard solution consumed; calculate the aluminum content in the sample.

Description

technical field [0001] The invention relates to a method for detecting aluminum in iron-aluminum-manganese alloys, in particular to an EDTA method for determining the aluminum content in the iron-aluminum-manganese alloy. Background technique [0002] Iron-aluminum-manganese heat-resistant alloy, as a new type of heat-resistant alloy material, has been widely used in the industry. However, there is no report on the analysis method of each element in this alloy. Because the content of each element is relatively high, its accuracy cannot be guaranteed by instrumentation. [0003] In iron-aluminum-manganese alloys, both iron and manganese interfere with the determination of aluminum, but due to the high content of aluminum, the volumetric method is used for determination. Aluminum forms sodium metaaluminate under strong alkali conditions, and other metal elements form hydroxide precipitates and separate from each other. Therefore, the key to this method is to eliminate the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 范树辉许丽鹃张娟姚芳许海燕
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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