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Method for preparing samples for X-ray fluorescence analysis based on foam-plastic combination

A technology for foam plastics and fluorescence analysis, which is applied in the field of sample preparation for X-ray fluorescence analysis, can solve the problems of uncontrollable sample powder dilution ratio, difficulty in studying sample powder uniformity, changing sample powder uniformity, etc., to achieve high production efficiency, Good effect of maintaining uniformity and fluidity

Active Publication Date: 2019-05-10
武汉市南华制冷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned technical defects are: 1. When the sample powder and the binder are mixed unevenly, the dilution ratio of the sample powder cannot be controlled, which affects the analysis results, and full mixing is time-consuming and laborious; 2. The thickness of the working layer for X-ray fluorescence analysis is generally less than 1mm. Mass <0.5g, when the sample powder mass is less than 0.5g, the traditional method cannot be compressed due to the large consumption of sample powder; 3. During the mixing process of sample powder and binder, the sample powder itself is also mixed, and the mixing changes The uniformity of the sample powder, so this technique is difficult to study the uniformity of the sample powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention discloses a preparation method of a sample piece for X-ray fluorescence analysis based on the combination of foam and plastic. The preparation method described in this embodiment is:

[0016] First make the foam plastic material into a cup-shaped container to obtain a foam plastic cup; place the sample powder in the foam plastic cup, and then transfer the foam plastic cup containing the sample powder into a tableting mold In the process, it is pressed and molded to obtain a sample for X-ray fluorescence analysis based on the combination of foam and plastic.

[0017] The foam plastic material is polyethylene.

[0018] The pressing is mechanical pressing.

Embodiment 2

[0020] The invention discloses a preparation method of a sample piece for X-ray fluorescence analysis based on the combination of foam and plastic. The preparation method described in this embodiment is:

[0021] First make the foam plastic material into a cup-shaped container to obtain a foam plastic cup; place the sample powder in the foam plastic cup, and then transfer the foam plastic cup containing the sample powder into a tableting mold In the process, it is pressed and molded to obtain a sample for X-ray fluorescence analysis based on the combination of foam and plastic.

[0022] The foam plastic material is polystyrene.

[0023] The pressing is manual pressing.

Embodiment 3

[0025] The invention discloses a preparation method of a sample piece for X-ray fluorescence analysis based on the combination of foam and plastic. The preparation method described in this embodiment is:

[0026] First make the foam plastic material into a cup-shaped container to obtain a foam plastic cup; place the sample powder in the foam plastic cup, and then transfer the foam plastic cup containing the sample powder into a tableting mold In the process, it is pressed and molded to obtain a sample for X-ray fluorescence analysis based on the combination of foam and plastic.

[0027] The foam plastic material is polyurethane.

[0028] The pressing is mechanical pressing or manual pressing.

[0029] Compared with the prior art, the present invention has the following positive effects:

[0030] 1. The present invention makes full use of the high X-ray transmittance of the bonding agent, and prepares the bonding agent into a foam plastic cup. When the sample powder is loade...

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PUM

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Abstract

The invention relates to a preparing method for an X-fluorescence-analysis sample sheet based on foamed plastic combination. The preparing method in the technical scheme includes the steps that a foamed plastic material is prepared into a cup-shape container, and a foam plastic cup is obtained; sample powder is put into the foam plastic cup, then the foam plastic cup filled with the sample powder is shifted into a sheet pressing mold and pressed and formed, and the X-fluorescence-analysis sample sheet based on the foamed plastic combination is obtained, wherein the foamed plastic material is one of polyethylene, polystyrene and polyurethane, and pressing is one of mechanical pressing and artificial pressing. The preparing method has the advantages of being convenient to operate, high in sheet forming rate, capable of keeping the sample uniformity and small in quality.

Description

technical field [0001] The invention belongs to the technical field of samples for X fluorescence analysis. In particular, it relates to a method for preparing a sample piece for X-fluorescence analysis based on the combination of foam and plastic. Background technique [0002] At present, binding agents are often used in the preparation of samples for X-ray fluorescence analysis to improve the strength of the analysis samples and prevent the sample powder from falling off. The preparation of the sample for X-ray fluorescence analysis is to fully mix the sample powder and the binder first, then put the mixed powder into a tableting mold, press and form it, and obtain the sample for X-ray fluorescence analysis. [0003] The above-mentioned technical defects are: 1. When the sample powder and the binder are mixed unevenly, the dilution ratio of the sample powder cannot be controlled, which affects the analysis results, and full mixing is time-consuming and laborious; 2. The t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 徐建平
Owner 武汉市南华制冷有限公司