ICP-OES method for determination of content of tungsten in ferrotungsten

A technology of ICP-OES and tungsten content, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of X-ray fluorescence spectrometry, such as complicated and harsh sample preparation, many analysis reagents, and long analysis period, so as to achieve clear solution without precipitation, The effect of low reagent consumption and short analysis cycle

Inactive Publication Date: 2018-04-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

Tungsten is not easy to dissolve because it is easily hydrolyzed. At present, the methods for measuring tungsten include gravimetric method, neutralization titration method, spectrophotometric method, etc., but these methods are cumbersome to operate, the analysis cycle is long, and many analytical reagents are used.
Centrifugal casting sample preparation-X-ray fluorescence spectrometry sample preparation is complex and demanding, and difficult to control

Method used

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Embodiment

[0028] 1. Instruments and working conditions:

[0029] Optima 5300DV plasma emission spectrometer (manufactured by American PE company)

[0030] Instrument working conditions: Echelle grating dual optical path two-dimensional dispersion spectroscopic system and plasma two-way observation system; the high-frequency generator is a 40.68MHz self-excited solid-state radio frequency generator; the torch is a quartz torch, and the material of the injection tube is oxidized Aluminum, the atomizer is an orthogonal atomizer; corundum gemstone nozzle, the spray chamber is Ryton material, Scott type corrosion-resistant spray chamber; the sampling system can withstand 20% hydrofluoric acid (V / V); working gas (Ar), The atomization gas flow rate is 1.0L / min, the plasma gas flow rate is 15L / min, and the auxiliary gas flow rate is 0.5L / min; the forward power is 1.2KW, and the axial observation is adopted, and the peak area is integrated.

[0031] 2. Main reagents:

[0032] Mixed acid soluti...

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PUM

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Abstract

The invention belongs to the analysis and detection field, and specifically relates to an ICP-OES method for determination of the content of tungsten in ferrotungsten. The technical problem to be solved by the invention comprises that provided is the ICP-OES method for determination of the content of tungsten in ferrotungsten, wherein the method includes the following steps: A, making a standard curve: preparing n standard solutions with the mass concentration of tungsten in 40-80%, detecting the light intensity value of each standard solution by a plasma emission spectrometer, and drawing theconcentration-light intensity standard curve through the concentrations and the corresponding light intensity values, wherein n>=2; B, preparing a to-be-tested solution: mixing ferrotungsten, a mixedacid solution and hydrogen peroxide, heating to completely dissolve ferrotungsten, and thus obtaining the to-be-tested sample; and similarly, detecting the to-be-tested sample by the plasma emissionspectrometer, to obtain a corresponding light intensity value; and C, according to the concentration-light intensity standard curve of the step A and the light intensity value of the step B, obtainingthe mass concentration of tungsten in the to-be-tested sample, and then calculating to obtain the content of tungsten in ferrotungsten. The method has the advantages of fast operation and accurate results.

Description

technical field [0001] The invention belongs to the field of chemical analysis and inspection of steel and iron alloys, and in particular relates to the rapid determination of tungsten content in ferro-tungsten by an ICP-OES method. Background technique [0002] The tungsten content in ferro-tungsten is generally 65-80%. As an alloy additive in steelmaking, ferro-tungsten can improve the creep strength and wear resistance of steel, and it is also a strong accelerator for carbides in steel. Tungsten is easily hydrolyzed and insoluble. At present, methods for measuring tungsten include gravimetric method, neutralization titration method, spectrophotometric method, etc., but these methods are cumbersome to operate, have a long analysis period, and use many analytical reagents. Centrifugal casting sample preparation-X-ray fluorescence spectrometry sample preparation is complex and demanding, and difficult to control. [0003] Based on the above studies, it is necessary to devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 罗小云朱茜袁萍李军
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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