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Method for measuring arsenic in high-chromium high-nickel steel

A high-chromium-nickel steel, analysis method technology, applied in material excitation analysis, thermal excitation analysis and other directions, can solve problems such as long analysis period, analysis error, and uncertainty in the selection of analysis lines

Active Publication Date: 2014-07-30
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corresponding analysis methods can be found for different alloy grades. Regarding the analysis of arsenic in high-chromium-nickel steel, there is currently no inductively coupled plasma method for accurately analyzing the arsenic element in this alloy at home and abroad. There are shortcomings such as sample dissolution, uncertain selection of analysis lines, etc., which lead to a long analysis period and certain analysis errors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Determination of arsenic content in high-chromium-nickel steel, using inductively coupled plasma emission spectrometer, the working conditions and analysis lines of the instrument are as follows: high-frequency frequency: 40.68MHz; incident power: 1.05Kw; reflected power: <15W; argon gas flow: cooling gas flow : 15L / min; auxiliary gas flow: 1.0L / min; pump speed: flushing pump speed 110rpm; analysis pump speed 110rpm; UV integration time: 5s;

[0060] (1) The reagents used in the determination process are as follows:

[0061] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0062] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0063] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0064] (1.4), sulfuric acid, ρ1.84g / mL; superior grade;

[0065] (1.5), hydrochloric acid, 1+1;

[0066] (1.6), sulfuric acid, 1+1;

[0067] (1.7), sodium hydroxide solution, 200g / L;

[0068] (1.8), arsenic standard solution A: 1.00mg / mL; weigh 0.1320g of the standard reage...

Embodiment 2

[0104] Determination of arsenic content in high-chromium-nickel steel, using an inductively coupled plasma instrument, the working conditions and analysis lines of the instrument are as follows: high-frequency frequency: 40.68MHz; incident power: 1.0Kw; reflected power: <15W; argon gas flow: cooling gas flow: 16L / min; auxiliary gas flow: 1.0L / min; pump speed: flushing pump speed 130rpm; analysis pump speed 130rpm; UV integration time: 2s; elemental analysis line: arsenic 197.262﹛170﹜nm.

[0105] (1) The reagents used in the determination process are as follows:

[0106] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0107] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0108] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0109] (1.4), sulfuric acid, ρ1.84g / mL; superior grade;

[0110] (1.5), hydrochloric acid, 1+1;

[0111] (1.6), sulfuric acid, 1+1;

[0112] (1.7), sodium hydroxide solution, 200g / L;

[0113] (1.8), arsenic standard solution A: 1.00mg / ...

Embodiment 3

[0149] Using an inductively coupled plasma emission spectrometer, the working conditions and analysis lines of the instrument are as follows: high-frequency frequency: 40.68MHz; incident power: 1.1Kw; reflected power: <15W; argon gas flow: cooling gas flow: 15L / min; auxiliary gas Flow rate: 0.50L / min; pump speed: flushing pump speed 130rpm; analysis pump speed 130rpm; UV integration time: 6s; elemental analysis line: arsenic 197.262﹛170﹜nm.

[0150] (1) The reagents used in the determination process are as follows:

[0151] (1.1), hydrochloric acid, ρ1.19g / mL; superior grade;

[0152] (1.2), nitric acid, ρ1.42g / mL; superior grade;

[0153] (1.3), hydrofluoric acid, ρ1.15g / mL; superior grade;

[0154] (1.4), sulfuric acid, ρ1.84g / mL; superior grade;

[0155] (1.5), hydrochloric acid, 1+1;

[0156] (1.6), sulfuric acid, 1+1;

[0157] (1.7), sodium hydroxide solution, 200g / L;

[0158] (1.8), arsenic standard solution A: 1.00mg / mL; weigh 0.1320g of the standard reagent arsenic...

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PUM

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Abstract

The invention belongs to analysis technologies for low-content elements in alloy, and relates to an analysis method for measuring arsenic in high-chromium high-nickel steel. The method comprises: adding 5 mL-15 mL of hydrochloric acid, 3 mL-8 mL of nitric acid and 10 drops-30 drops of hydrofluoric acid, heating and dissolving a sample. According to the method, hydrofluoric acid is employed for dissolve the sample, so that a clear sample solution is obtained; by performing interference experiments, an optimum analysis spectral line is determined, and the measuring accuracy is improved; the method is wide in measure scope, the measure lower limit is 0.01%, and the measure upper limit is 0.50%; by synchronously processing the sample and preparing a high-standard solution and a low-standard solution for measuring arsenic element, the analysis error is minimum and the method is good in repeatability; the recovery rate and the precision degree are relatively good; results obtained through analysis on a standard sample, method reviewing and the like are compared and indicate that the made analysis method is good in accuracy and the method is stable and completely accords with requirements on low-content element analysis; and the method disclosed by the invention is rapid in measure and simple in operation and helps to save a large amount of manpower and material resource.

Description

technical field [0001] The invention belongs to the low-content element analysis technology of alloys, and relates to an analysis method for determining arsenic in high-chromium-nickel steel. Background technique [0002] Iron is the main element of steel, and the carbon content is usually below 2% while containing other elements. High chromium nickel steel has high strength, corrosion resistance and toughness because it contains about 24% nickel and about 25% chromium. And because of its low price and reliable performance, it has become one of the most used materials at present, and it is an indispensable part in the construction industry, manufacturing industry and people's daily life. [0003] At present, most of the methods for detecting arsenic in steel components at home and abroad are arsenic iodide extraction molybdenum blue photometry, diethylcarbamate silver photometry, distillation separation photometry, graphite furnace atomic absorption spectrometry, and metal ...

Claims

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Application Information

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IPC IPC(8): G01N21/73
Inventor 叶晓英
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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