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Determination method of total aluminum content in steel and alloy

A determination method and technology for aluminum content, applied in the field of chemical detection, to achieve the effects of less environmental pollution, less matrix effect and high analysis accuracy

Active Publication Date: 2014-04-02
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a national standard for the determination of acid-soluble aluminum in low alloy steel by inductively coupled plasma atomic emission spectrometry, but there is no method for the determination of all aluminum by inductively coupled plasma atomic emission spectrometry

Method used

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  • Determination method of total aluminum content in steel and alloy
  • Determination method of total aluminum content in steel and alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare the following standard solutions as usual:

[0046] 1. Preparation of aluminum standard solution:

[0047] 1A. Put 1.0000g of pure commercially available metallic aluminum in a 400 mL beaker, add hydrochloric acid at an amount of 200mL / g metallic aluminum, dissolve in a water bath at 85°C (1-3 days), and cool to room temperature after dissolving ;

[0048] 1B. Transfer the solution in step 1A into a 1000mL volumetric flask, dilute to 1000mL with distilled water, and shake well to obtain a 1mg / mL aluminum standard stock solution;

[0049] 1C. Pipette 20mL of the solution in step 1B into a 100mL volumetric flask, add 10mL of hydrochloric acid (1+1), dilute to 100mL with water, and shake well to obtain a 200.0ug / mL aluminum standard solution.

[0050] 1D. Pipette 25mL of the solution in step 1C into a 100mL volumetric flask, add 10mL of hydrochloric acid (1+1), dilute to 100mL with water, and shake well to obtain a 50.0ug / mL aluminum standard solution.

[0051] ...

Embodiment 2

[0062] Preparation of all-aluminum sample solution in steel and alloy to be tested:

[0063] 1A. Add 10mL of distilled water to 0.5000g of steel and alloy samples to be tested, according to the amount of 20mL / g sample, to obtain a mixed solution;

[0064] 1B. In the mixed solution obtained in step 1A, add 8 mL of hydrochloric acid in an amount of 15 mL / g sample to obtain a mixed solution;

[0065] 1C. Add 3 mL of nitric acid to the mixed liquid obtained in step 1B according to the amount of 6 mL / g sample, heat and dissolve on a 100°C electric heating plate at low temperature, cool to room temperature, filter with slow filter paper with a small amount of pulp added, and precipitate Move all into filter paper, wash the filter paper and precipitate with hydrochloric acid (5+95) for 7 to 8 times, and wash with hot water for 2 to 3 times to obtain the filtrate, residue and filter paper;

[0066] 1D. Put the residue and filter paper obtained in step 1C in a platinum crucible, dry a...

Embodiment 3

[0073] Preparation of all-aluminum sample solution in steel and alloy to be tested:

[0074] 1A. Add 13mL of distilled water to 0.5000g of steel and alloy samples to be tested, according to the amount of 25mL / g sample, to obtain a mixed solution;

[0075] 1B. In the mixed solution obtained in step 1A, add 10 mL of hydrochloric acid in an amount of 20 mL / g sample to obtain a mixed solution;

[0076] 1C. Add 4 mL of nitric acid to the mixed liquid obtained in step 1B, according to the amount of 8 mL / g sample, heat and dissolve on a hot plate at 120 °C at low temperature, cool to room temperature, filter with slow filter paper with a small amount of pulp added, and precipitate Move all into filter paper, wash the filter paper and precipitate with hydrochloric acid (5+95) for 7 to 8 times, and wash with hot water for 2 to 3 times to obtain the filtrate, residue and filter paper;

[0077] 1D. Put the residue obtained in step 1C and filter paper in a platinum crucible, dry and ash,...

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Abstract

The invention discloses a determination method of total aluminum content in steel and alloy. The method comprises the steps of pretreatment and determination, and particularly comprises the following steps: adding distilled water, hydrochloric acid and nitric acid to a sample to be determined to heat and dissolve at low temperature; filtering by slow speed filter paper; taking filtrate as main liquid, fusing the residue by using sodium pyrosulfate, leaching by hydrochloric acid, and merging the main liquid; fixing the volume by using the distilled water, so as to obtain a sample solution to be determined; and determining by using a spectrograph, so as to obtain the target content data. By adopting the determination method, the defects that the wet-process analysis operation process is complicated, the operation is not easy to grasp, more interference elements exist, more chemical reagents are used and the like are avoided, and the characteristics that a plasma emission spectrum is low in detection limit, good in accuracy, small in matrix effect and the like are fully and effectively utilized. The determination method disclosed by the invention is simple and convenient to operate, less in reagent dosage, high in analysis accuracy, short in detection period, and small in environmental pollution, and the determination requirements of total aluminum content in daily steel and alloy can be met.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and in particular relates to a method for measuring the total aluminum content in steel and alloys. Background technique [0002] The determination of the total aluminum content in steel and alloys currently uses the copper reagent separation-chrome azure S spectrophotometric method in the national standard. The content is different, and the method of eliminating interference can not help but be the same. When perchloric acid smokes chromium oxide, the degree is not easy to control, which affects the accuracy of the analysis results, and consumes a large amount of chemical reagents, which not only pollutes the environment but also endangers the health of operators. healthy. Inductively coupled plasma atomic emission spectrometry is a relatively mature analysis method in recent years, which has the characteristics of low detection limit, good accuracy, and small matrix effect, and can ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N21/73
Inventor 曾海梅孙肖媛
Owner WUKUN STEEL
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