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Inductively coupled plasma-atomic emission spectrometry for measuring chromium and zirconium in Cu-Cr-Zr alloy

An atomic emission spectrometry and inductive coupling technology, applied in the field of plasma atomic emission spectrometry, can solve the problems of slow analysis speed and cumbersome operation, and achieve the effect of simple operation and overcoming cumbersome operation.

Inactive Publication Date: 2015-05-13
QINGDAO TIANHENG MACHINERY
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AI Technical Summary

Problems solved by technology

Determination of chromium and zirconium by chemical wet method, the operation is cumbersome and the analysis speed is slow

Method used

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Embodiment

[0016] The inductively coupled plasma atomic emission spectrometry of the determination of chromium and zirconium in the copper-chromium-zirconium alloy of the present embodiment includes the following contents:

[0017] (1) Main instruments and their working conditions: IRIS Intrepid II XSP ICP emission spectrometer (Thermo Electron, USA); RF power: 1150W; frequency: 27.12MHz; atomizer pressure: 0.193MPa; auxiliary gas flow: 0.5L / min; sample washing time: 30s; low wavelength exposure time: 20s; high wavelength exposure time: 20s; sample lifting volume: 2.03mL / min;

[0018] (2) Reagent Cr, Zr single-element standard stock solution (National Iron and Steel Materials Testing Center): 1000mg / L; pure copper: the mass fraction of copper is greater than 99.95%; argon: the volume fraction of argon is above 99.99%, and the reagents used are all It is analytically pure, and the testing water is double distilled water;

[0019] (3) Detection method: Weigh 0.1000g copper-chromium-zirco...

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Abstract

The invention discloses an inductively coupled plasma-atomic emission spectrometry for measuring chromium and zirconium in a Cu-Cr-Zr alloy. According to the invention, nitric acid and sulfuric acid are used to dissolve a sample, spectral lines at 284.984nm and at 343.823nm without interference among elements are selected as analytical lines of Cr and Zr, a copper matrix matching technology is adopted, and chromium and zirconium in a Cu-Cr-Zr alloy are measured by an inductively coupled plasma-atomic emission spectrometry (ICP-AES). Detection limits of chromium and zirconium are respectively 0.009 microgram / mL and 0.012 microgram / mL. The above method is used for measuring chromium and zirconium in the Cu-Cr-Zr alloy sample. Measurement results are respectively consistent with an ammonium persulfate oxidation volumetric method (JB / T9552.2-1999) and a xylenol orange spectrophotometric method (JB / T9552.5-1999). Relative standard deviations of ten parallel determinations are respectively 0.40% and 0.28%.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to an inductively coupled plasma atomic emission spectrometry for measuring chromium and zirconium in a copper-chromium-zirconium alloy. [0003] Background technique [0004] Copper-chromium-zirconium alloy has good wear resistance and anti-friction properties. After aging treatment, the hardness, strength, electrical conductivity and thermal conductivity are all significantly improved, and it is easy to weld. It has been widely used in the preparation of motor commutators, spot welding electrodes, and motor rotors. End rings and guide bars, etc. The chemical composition of copper-chromium-zirconium alloy is the main indicator of the performance of copper-chromium-zirconium alloy. At present, the determination of chromium in this alloy mostly adopts chemical wet method (see JB / T9552.2-1999) or atomic absorption spectrometry (see JB / T9552.3-1999), and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
Inventor 刘升迁
Owner QINGDAO TIANHENG MACHINERY
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