Method for simultaneously measuring elements of silicon, aluminum, calcium and barium

A technology of various elements, calcium and barium, applied in the field of chemical analysis, can solve the problem of large amount of reagents, and achieve the effect of reducing pollution and accurate measurement results

Inactive Publication Date: 2009-01-14
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, these methods all use conventional nitric acid, hydrofluoric acid to dissolve, and perchloric acid to decompose the sample, and the amount of reagents is large.

Method used

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  • Method for simultaneously measuring elements of silicon, aluminum, calcium and barium
  • Method for simultaneously measuring elements of silicon, aluminum, calcium and barium
  • Method for simultaneously measuring elements of silicon, aluminum, calcium and barium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of method that can measure each element of silicon aluminum calcium barium simultaneously, its steps:

[0049] 1) The sample is pretreated by the acid dissolution method:

[0050] a) Get a sample of 0.2000 grams and place it in a microwave digestion tank;

[0051] b) Place the microwave digestion tank in water at a temperature of 18°C, wet the sample with deionized water, and add 5 ml of nitric acid to the cold water;

[0052] c) adding 1 milliliter of hydrofluoric acid dropwise;

[0053] d) After the violent reaction stops, add 1 ml of hydrofluoric acid and cover with a lid to control the temperature of the sample at 58°C;

[0054] 2) Carry out microwave digestion:

[0055] First, heat to make the temperature in the microwave digestion tank reach 100°C, and control the heating rate at 20°C / min;

[0056] Digestion: Continue heating to make the temperature in the microwave digestion tank reach 180°C, and control the heating rate at 10°C / min;

[0057] Re-diges...

Embodiment 2

[0070] A kind of method that can measure each element of silicon aluminum calcium barium simultaneously, its steps:

[0071] 1) The sample is pretreated by the acid dissolution method:

[0072] e) take a sample of 0.2000 grams and place it in a microwave digestion tank;

[0073] f) Place the microwave digestion tank in water at a temperature of 18°C, wet the sample with deionized water, and add 5 ml of nitric acid to the cold water;

[0074] g) dropwise adding 1 ml of hydrofluoric acid;

[0075] h) After the violent reaction stops, add 1 ml of hydrofluoric acid and cover with a lid to control the temperature of the sample at 50°C;

[0076] 2) Carry out microwave digestion:

[0077] First, heat to make the temperature in the microwave digestion tank reach 110°C, and control the heating rate at 21°C / min;

[0078] Digestion: Continue heating to make the temperature in the microwave digestion tank reach 195°C, and control the heating rate at 12°C / min;

[0079] Re-digestion: k...

Embodiment 3

[0092] A kind of method that can measure each element of silicon aluminum calcium barium simultaneously, its steps:

[0093] 1) The sample is pretreated by the acid dissolution method:

[0094] a) Get a sample of 0.2000 grams and place it in a microwave digestion tank;

[0095] b) Place the microwave digestion tank in water at a temperature of 18°C, wet the sample with deionized water, and add 5 ml of nitric acid to the cold water;

[0096] c) adding 1 milliliter of hydrofluoric acid dropwise;

[0097] d) After the violent reaction stops, add 1 ml of hydrofluoric acid and cover with a lid to control the temperature of the sample at 45°C;

[0098] 2) Carry out microwave digestion:

[0099] First, heat to make the temperature in the microwave digestion tank reach 120°C, and control the heating rate at 23°C / min;

[0100] Digestion: Continue heating to make the temperature in the microwave digestion tank reach 210°C, and control the heating rate at 12°C / min;

[0101] Re-diges...

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Abstract

The invention discloses a method that can simultaneously analyze various elements, aims at solving the defects that currently the analysis of various elements cannot be finished at one time, and consequently the analysis time is long and the reagent usage is large, and discloses a method that can simultaneously measure the elements of silicon, aluminum, calcium and barium and comprises the following steps: a test sample is preprocessed through the acid dissolution method, microwave-digested, naturally cooled, and then placed into a volumetric flask with scales, diluted and shaken until well distributed, a solution with a standard working curve is prepared, an atomic emission spectrograph of inductance coupled plasmas is started and led to reach the measurement requirement, a plasma torch is lighted, the relative standard deviation of the plasma torch is led to be less than 5 percent, wavelength of each element is chosen, the working curves are plotted, and the content of each element is computed. The method combines the microwave digesting sample dissolution technique with the atomic emission spectrograph of inductance coupled plasmas, can simultaneously analyze nine elements including silicon, etc., is accurate and quick, has greatly reduced reagent usage, and reduces the environmental pollution that is caused by chemical reagents.

Description

technical field [0001] The invention relates to chemical analysis, and more specifically belongs to a method for measuring and analyzing the content of each element of a silicon-aluminum-calcium-barium alloy. Background technique [0002] Silicon-aluminum-calcium-barium alloy is a new type of steelmaking deoxidizer and desulfurizer commonly used in electric furnace and converter steelmaking processes. It can minimize the oxygen in steel, and at the same time form complex inclusions of calcium, barium and aluminum from Floating in the steel, pure molten steel, improving the impact toughness and processing performance of steel. Therefore, it is of great significance to accurately measure the chemical composition of silicon-aluminum-calcium-barium alloy for the improvement of smelting process and the control of product quality. [0003] At present, there is no national and industry standard analytical method for the determination of the content of each element in the silicon-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/44
Inventor 李洁赵希文张穗忠程运娥李杰杨艳吴秀云
Owner 武钢集团有限公司
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