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Method for quickly analyzing content of rare earth in rock weathering crusts by using visible light-near infrared reflection spectrometer

A reflection spectrum and near-infrared technology, applied in the field of analysis, can solve the problems of long experimental period and high price, and achieve the effect of low detection limit and high accuracy

Inactive Publication Date: 2019-05-28
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the detection limit of these analysis methods is low (better than 1ppm), they all need to pretreat the samples indoors, and the experimental period is long and expensive (50-200RMB / sample)

Method used

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  • Method for quickly analyzing content of rare earth in rock weathering crusts by using visible light-near infrared reflection spectrometer
  • Method for quickly analyzing content of rare earth in rock weathering crusts by using visible light-near infrared reflection spectrometer
  • Method for quickly analyzing content of rare earth in rock weathering crusts by using visible light-near infrared reflection spectrometer

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The sample comes from the rock weathering crust of an ion-adsorption rare earth deposit in Ganzhou City, Jiangxi Province. In this example, we use the Analytical Spectral Devices (ASD) FieldSpec-3 spectrometer to measure the reflection spectrum, and the spectral analysis results of the rare earth content of the weathering crust sample Compared with the results of ICP-MS analysis.

[0026] Proceed as follows:

[0027] 1. After the sample is naturally air-dried under laboratory conditions, select about 10g and put it into a vessel with a depth of 0.5cm and a diameter of 1.5cm, and flatten the surface with a glass sheet.

[0028] 2. Use the Analytical Spectral Devices (ASD) FieldSpec-3 spectrometer to measure the reflectance spectrum, wherein the spectral range is 350-1000nm. During the measurement process, the spectrometer was preheated for 30 minutes, and then the standard white board was used for spectral calibration.

[0029] 3. Measure the sample twice from differen...

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Abstract

The invention discloses a method for detecting the content of rare earth in rock weathering crusts by using a visible light-near infrared reflection spectrometer and analyzing data. The content of therare earth in outcrops, surface soil and drilling samples of the rock weathering crusts is tested by using the handheld visible light-near infrared reflection spectrometer, through specific sample pretreatment and data processing means, the interference of water, organic matter, ferric oxides and other components in the samples with the testing accuracy of the content of the rear earth is eliminated, the accuracy and the sensitivity of testing the content of the rear earth in the rock weathering crusts are improved, and the requirements of weathering crust ion adsorption type rare earth deposit ore prospecting and exploration work for quick analysis of the samples are met.

Description

Technical field: [0001] The invention relates to the field of analysis, in particular to a method for quickly analyzing rare earth content in rock weathering crusts by using visible light-near-infrared reflection spectrum. Background technique: [0002] Rare earth elements are called "industrial vitamins" due to their wide application in many fields such as national defense, aerospace, special materials, metallurgy, energy and agriculture. In recent years, due to the rapid development of aerospace, new energy and new materials, rare earths have become a key strategic resource. Due to the increasing demand for rare earths in western developed countries, the price of rare earths (especially heavy rare earths) in the international market continues to rise. Driven by market demand and economic benefits, countries all over the world have attached great importance to the exploration, development and utilization of rare earth deposits in recent years. The weathered crust ion-adso...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/3563G01N21/359
Inventor 谭伟刘嘉成何宏平秦效荣梁晓亮马灵涯黄健黄玉凤
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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