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Mineral material infrared fluorescent light analysis method

A technology of infrared fluorescence and mineral materials, applied in the field of infrared fluorescence test analysis and similar sample identification, to achieve the effect of system operation and low cost

Inactive Publication Date: 2004-12-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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Problems solved by technology

However, the specific infrared fluorescence analysis method has not been reported as a special mineral and material analysis method and instrument.

Method used

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  • Mineral material infrared fluorescent light analysis method
  • Mineral material infrared fluorescent light analysis method
  • Mineral material infrared fluorescent light analysis method

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Experimental program
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Embodiment Construction

[0016] Infrared fluorescence analysis of mineral materials, the specific steps are as follows:

[0017] 1). Select near-ultraviolet, visible and infrared light sources, such as selecting small semiconductor lasers of various wavelengths and LED devices of light-emitting diodes of various wavelengths. The wavelengths are: 460-470, 470-480, 500-510, 520- 530, 585-593, 600-610, 620-635, 650, 680, 850, 880, 940nm and other wavelengths are used as excitation light sources; the light sources 1 of each wavelength are installed on the rotatable disc 2 in order of wavelength, and the circular The disk is rotatable about an axis 3 and is positioned by a positioning pin 4 .

[0018] 2). Using the experimental method, try to excite the sample with light of several wavelengths, such as 400nm, 800nm, 1200nm, 1600nm or so, and initially observe the position of the excited fluorescence peak wavelength, and determine the key fluorescence wavelength to be analyzed The short-wave limit λ L , t...

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Abstract

Near ultraviolet-infrared source in wavelength slightly shorter than peak wavelength in fluorescence spectrum of sample to be analyzed irradiates sample of mineral material in plane, line, point or expanded beam modes. IR Excitated fluorescence is converged to entrance window. Photo detector installed on exit window of optical splitter carries out photovoltaic conversion. After A / D conversion, digital signal is inputted to computer for plotting out wavelength-intensity curve, i.e. fluorescence spectrum. Analyzing peak shape, peak position and intensity of fluorescence spectrum (mainly in infrared part) obtains information of the sample. Features of the method are: suitable to lots of samples, wide analyzable wavelengths, high excitated efficiency and low cost.

Description

technical field [0001] The invention relates to a method for analyzing and identifying characteristics such as trace elements and defects of mineral and material samples, specifically, infrared fluorescence test analysis and similar sample identification for minerals, gemstones, artificial crystals or other natural or artificial materials Methods. Background technique [0002] Fluorescence analysis method is an ancient analysis technique. It is generally believed that some samples are irradiated with short-wavelength light such as blue light, purple light or ultraviolet light to produce visible light with longer wavelength, which is fluorescence. The fluorescence color, wavelength and intensity can reflect the type of sample, Trace elements, defects and their distribution are widely used in biology, medicine, organic chemical industry, agriculture, food, gemstones, geology, archaeology, criminal investigation and other fields. The corresponding instruments mainly include ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 杨勇杨文璐
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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