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Quantitative analysis method for As element in pyrite by using mineral Raman parameters

A quantitative analysis, pyrite technology, applied in the direction of using wave/particle radiation for material analysis, Raman scattering, analysis of materials, etc. The effect of less sample preparation time and strong characteristic signal

Active Publication Date: 2021-08-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] For the determination of As element content in pyrite, at present, it is mainly based on electron probe or laser ablation plasma mass spectrometry analysis, which has the disadvantages of cumbersome preparation work, complicated instrument operation, and damage to samples.

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  • Quantitative analysis method for As element in pyrite by using mineral Raman parameters
  • Quantitative analysis method for As element in pyrite by using mineral Raman parameters
  • Quantitative analysis method for As element in pyrite by using mineral Raman parameters

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Embodiment Construction

[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] like figure 1 Shown, utilize mineral Raman parameter of the present invention to the quantitative analysis method of As content in pyrite, comprise the following steps:

[0023] S1. Carry out pyrite Raman spectral imaging scanning: use the incident light source of 556nm wavelength to scan the surface of the pyrite sample to be tested, and obtain the Raman image of the pyrite sample to be tested; in this step, the French HORIBA JOBIN YVON company is used The produced LabRAM HR Evolution laser confocal Raman microscope scans the mineral samples to be tested with a spectral resolution of 0.65cm -1 , the focal length of the spectrometer is 800mm, using 556nm Ar + Laser, 10X Leica objective lens, scanning range is 300~400 -1 cm.

[0024] The pyrite sample to be tested needs to meet the following three characteristic peak sections of pyri...

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Abstract

The invention discloses a quantitative analysis method for As content in pyrite by using mineral Raman parameters. The method comprises the following steps: S1, carrying out pyrite Raman spectrum imaging scanning; S2, carrying out peak-splitting fitting on the Raman image, and making a precise imaging distribution diagram of the sample about the Ag Raman displacement value; S3, measuring a Raman imaging graph of the As content in the same area of the sample; S4, performing Photoshop proofreading and matching on the precise imaging distribution diagram related to the Ag Raman displacement value and the As content Raman imaging diagram, and converting the precise imaging distribution diagram and the As content Raman imaging diagram into a data diagram; and S5, making a scatter diagram of a Cartesian coordinate system through the electronic probe and the Raman imaging data diagram, analyzing the quantitative relation between the Ag Raman shift and the As content in the pyrite, and fitting an equation. According to the method, the As content in the pyrite is quantitatively analyzed by utilizing the mineral Raman parameters, the operation is simple, and the test speed is high. Raman spectrum characteristic signals are strong, the signal-to-noise ratio is high, the specificity is high, the recognition accuracy can be improved, and misrecognition is reduced.

Description

technical field [0001] The invention relates to a quantitative analysis method for As content in pyrite by using mineral Raman parameters. Background technique [0002] Pyrite, a common sulfide of iron, is often mistaken for gold because of its light brassy color and bright metallic luster. Pyrite is an important gold-bearing mineral in gold deposits. The determination of As content in pyrite can provide a large amount of gold ore genesis and prospecting information, so it is very important for the rapid determination of As content in pyrite. Value. [0003] For the determination of As element content in pyrite, at present, it is mainly based on electron probe or laser ablation plasma mass spectrometry analysis, which has the disadvantages of cumbersome preparation work, complicated instrument operation, and damage to samples. Therefore, there is a need for a new technical method that can be characterized quickly and with reliable results. Contents of the invention [0...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N23/223
CPCG01N21/65G01N23/223Y02P10/20
Inventor 宋昊姚畅李圻张刚阳徐争启池国祥李娜
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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