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Method for detecting microelements in chromium powder

A technology for medium and trace elements and trace elements, which is applied in the field of quantitative analysis of analytical chemistry, can solve problems such as no reports in literature or patents, and achieve the effect of saving test costs, eliminating influence, and fast and efficient analysis methods.

Inactive Publication Date: 2018-04-17
ZIGONG CEMENTED CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are no reports or patents on the determination of impurity elements in chromium powder by inductively coupled plasma emission spectrometry

Method used

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  • Method for detecting microelements in chromium powder
  • Method for detecting microelements in chromium powder
  • Method for detecting microelements in chromium powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The method for detecting nickel, manganese, iron, zinc, calcium, magnesium, aluminum, titanium, vanadium, and cobalt in No. 1 chromium powder sample, the detection wavelength of the trace elements to be measured, the detection limit of the method, and the lower detection limit of the sample.

[0082] S1: draw the standard working curve

[0083] S11: Preparation of chromium matrix standard series solutions

[0084] Weigh four parts of 0.1000g high-purity chromium powder matrix in parallel, place them in four 200mL quartz beakers respectively, add 20mL hydrochloric acid, cover with a quartz watch glass, dissolve on a 250°C electric heating plate, the sample is completely dissolved, remove it, and use a small amount of Rinse the cup wall and the inner wall of the watch glass with water, dilute to about 30mL, cover the watch glass, heat and boil on a 250°C electric heating plate for 1min, remove and cool, transfer the test solution into four 100mL volumetric flasks, and the...

Embodiment 2

[0110] The method for detecting nickel, manganese, iron, zinc, calcium, magnesium, aluminum, titanium, vanadium, and cobalt in No. 1 chromium powder sample, the detection wavelength of the trace elements to be measured, the detection limit of the method, and the lower detection limit of the sample.

[0111] S1: draw the standard working curve

[0112] S11: Preparation of chromium matrix standard series solutions

[0113] Weigh four parts of 0.2000g high-purity chromium powder matrix in parallel, place them in four 200mL quartz beakers respectively, add 30mL hydrochloric acid, cover with a quartz watch glass, dissolve on a 300°C electric heating plate, the sample is completely dissolved, remove it, and use a small amount of Rinse the cup wall and the inner wall of the watch glass with water, dilute to about 30mL, cover the watch glass, heat and boil on a 300°C electric heating plate for 1min, remove and cool, transfer the test solution into four 100mL volumetric flasks, and the...

Embodiment 3

[0139] The method for detecting nickel, manganese, iron, zinc, calcium, magnesium, aluminum, titanium, vanadium, and cobalt in No. 1 chromium powder sample, the detection wavelength of the trace elements to be measured, the detection limit of the method, and the lower detection limit of the sample.

[0140] S1: draw the standard working curve

[0141] S11: Preparation of chromium matrix standard series solutions

[0142] Weigh four parts of 0.4000g high-purity chromium powder matrix in parallel, place them in four 200mL quartz beakers respectively, add 40mL hydrochloric acid, cover with a quartz watch glass, dissolve on a 300°C electric heating plate, the sample is completely dissolved, remove it, and use a small amount of Rinse the cup wall and the inner wall of the watch glass with water, dilute to about 30mL, cover the watch glass, heat and boil on a 300°C electric heating plate for 1min, remove and cool, transfer the test solution into four 100mL volumetric flasks, and the...

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Abstract

The invention discloses a method for detecting microelements in chromium powder. On an inductively coupled plasma atomic emission spectrometer, the best detection condition and the optimum detection wavelength of to-be-detected microelements are selected, and the standard work curve is obtained by detecting standard serial solutions of chromium substrates; a sample solution is detected according to the detection conditions of the standard serial solutions and the best detection wavelength of each microelement, and corresponding spectral line intensity of to-be-detected microelements in the sample solution is obtained; the content of the to-be-detected microelements in the sample solution is determined according to the acquired standard work curve and the corresponding spectral line intensity of the to-be-detected microelements in the sample solution. The content of multiple microelements in chromium powder can be measured simultaneously with the detection method; with the adoption of amatched standard work curve method of the of chromium substrates, spectral interference of the substrates with chromium as a major component to microelement determination is eliminated, influence ofa hydrochloric acid solution to the substrates is also eliminated, and the accuracy of the microelement detection result is high.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry quantitative analysis, and in particular relates to a detection method for trace elements in chromium powder. Background technique [0002] Chromium powder (Cr) is mainly used in welding consumables, vacuum coating, plasma spraying, hot isostatic pressing chromium target raw materials, and can also be used as an additive for cemented carbide, diamond tools, stainless steel or ceramics, which can increase the surface corrosion resistance, adding a small amount It can also be used as a grain growth inhibitor. The detection methods involving trace impurity elements in chromium powder include ICP-MS assay, atomic absorption spectrometry, titration, spectrophotometry, polarography and gravimetric method. The deficiencies of these detection methods are: [0003] Patent "ICP-MS Determination Method of Trace Element Impurities in High-Purity Chromium" (Patent (Open) No. 104597110A), the invo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 菅豫梅
Owner ZIGONG CEMENTED CARBIDE CORP
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