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ICP-AES measurement of arsenic content in steel

A technology of steel and measurement methods, applied in the field of trace element arsenic, which can solve the problems of inconvenient solution preparation, limited production, low repeatability, etc.

Active Publication Date: 2016-01-20
贵阳渝冠技术服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently used measurement methods such as spectrophotometry are complicated to measure, inconvenient to prepare solutions, inaccurate measurement results, and low repeatability, which have limited production needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for measuring trace element arsenic in steel, the method comprising:

[0018] (1) Weigh 50 mg of the sample and place it in a 100 ml Erlenmeyer flask, add 5 ml of 60% potassium permanganate and 5 ml of nitric acid (1:1), heat until the sample is completely dissolved, continue to evaporate to near dryness, and then cool to Room temperature; add 10ml of nitric acid (1:1) again, then pour this solution into a 60ml separating funnel, then add 20ml of n-butanol-chloroform and 10ml of ammonium molybdate solution into the funnel, cover and shake for 60 seconds, and wait for static After layering, heat to 100 degrees Celsius, then cool to room temperature, let stand until the layers are separated and discard the organic phase; add 15ml of ethyl acetate, shake for 90 seconds, add 15ml of chloroform, shake for 30 seconds, continue to stand for minutes After layering, place the organic phase in another 60ml separating funnel, add 20ml of stannous chloride, and shake for 3...

Embodiment 2

[0029] A method for measuring trace element arsenic in steel, the method comprising:

[0030] (1) Weigh 50 mg of the sample and place it in a 100 ml Erlenmeyer flask, add 5 ml of 60% potassium permanganate and 5 ml of nitric acid (1:1), heat until the sample is completely dissolved, continue to evaporate to near dryness, and then cool to Room temperature; add 10ml of nitric acid (1:1) again, then pour this solution into a 60ml separating funnel, then add 20ml of n-butanol-chloroform and 10ml of ammonium molybdate solution into the funnel, cover and shake for 60 seconds, and wait for static After layering, heat to 125 degrees Celsius, then cool to room temperature, let stand until layering and discard the organic phase; add 15ml of ethyl acetate, shake for 90 seconds, add 15ml of chloroform, shake for 30 seconds, discard after layering After removing the organic phase, dilute to 100mL with ultrapure water for use;

[0031] (2) The sample digestion solution obtained according t...

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PUM

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Abstract

The invention discloses a measurement method for the content of arsenic in steel, wherein in the method, the content of arsenic in a steel sample is measured by an ICP-AES (inductively coupled plasma-atomic emission spectrometer) method. The method comprises the following steps of: dissolving the arsenic-containing sample, adding a certain amount of potassium permanganate and nitric acid solution, and then adding solution such as n-butyl alcohol-chloroform, and heating to digest, in this way, arsenic can be effectively dissolved; and then measuring the content of arsenic by an ICP-AES spectrograph. The method is less in matrix interference, and capable of meeting the needs of production.

Description

technical field [0001] The invention relates to the measurement of elements, in particular to the measurement of trace element arsenic in iron and steel by means of ICP-AES plasma coupled atomic emission spectrometry. Background technique [0002] Arsenic is rare in general iron ore, but it is more common in limonite. It exists in the form of arsenopyrite (FeAs2S) or other oxides (As2O3, As3O5). Most of arsenic enters pig iron during smelting. When steel When the arsenic content in steel exceeds 0.1%, it will make the steel cold and brittle, and affect the welding performance of the steel. Therefore, it is particularly important to find a fast and effective method for measuring the arsenic content in steel. However, currently used measurement methods such as spectrophotometry are complicated to measure, inconvenient to prepare solutions, inaccurate in measurement results, and low in repeatability, which have limited production needs. Inductively coupled plasma atomic emissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/71G01N1/44
Inventor 傅酉付玉生
Owner 贵阳渝冠技术服务中心