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A method for arranging sample powder when the sample tablet for xrfs analysis is pressed

An arrangement method and powder technology, which are applied in the field of sample pressing for XRFS analysis, can solve the problems of large investment and consumption of tablet pressing machines and supporting equipment, long process of flattening the surface of sample powder, large fluctuation of sample powder quality, etc. The effect of small fluctuation, simple structure and fast loading speed

Active Publication Date: 2022-07-19
WUHAN UNIV OF SCI & TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the technical defects of the existing technology are: the process of using the lining film to assist sample loading to make the surface of the sample powder is relatively long, and the sample loading time is relatively long; the quality of the effective sample powder fluctuates greatly during tabletting; When the pressure is high, the energy consumption is high; the investment and consumption of the tablet press and supporting equipment are large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for arranging sample powder when a sample tablet for XRFS analysis is pressed. The steps of the preparation method described in this embodiment are:

[0040] Step 1. A square steel plate with a thickness of 1.0 mm and a side length of 45 mm is provided with a corner hole with a diameter of 2.2 mm and a large round hole with a diameter of 36 mm to obtain an upper hole frame.

[0041] The center of the corner hole is located at the bisector of any right angle of the square steel plate and the distance from the right angle is 3 mm, and the center of the large round hole is located at the center of the square steel plate.

[0042] Step 2: First, a square steel plate with a thickness of 2.0mm and a side length of 45mm is opened with corner holes and large round holes that are the same as the hole diameter of the upper hole frame and the center of the hole, and then a countersunk hole is opened at the orifice of the large round hole. The diameter of the counterbore ...

Embodiment 2

[0051] A method for arranging sample powder when a sample tablet for XRFS analysis is pressed. Except step 5, all the other are the same as embodiment 1:

[0052] Step 5. Place 1.8 g of boric acid on the lower indenter in the silo of the tablet press, so that the boric acid covers all the pressed surfaces.

Embodiment 3

[0054] A method for arranging sample powder when a sample tablet for XRFS analysis is pressed. Except step 5, all the other are the same as embodiment 1:

[0055] Step 5. Put 1.5 g of boric acid on the lower pressure head in the silo of the tablet press, so that the boric acid covers all the pressed surfaces.

[0056] Compared with the prior art, this specific embodiment has the following positive effects:

[0057] 1. In this specific embodiment, the paper bottom is directly assembled on the sample loading frame, and the prepared paper bottom sample loading tray has a simple structure and is easy to prepare.

[0058] 2. In this specific embodiment, after the paper-bottomed sample loading tray is filled with the sample powder to be pressed, the sample powder to be pressed is scraped with a scraper, and the process of finely leveling the sample powder to be pressed is not required. Sample fast.

[0059] 3. The sample loading volume of the paper bottom sample loading tray prep...

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Abstract

The invention relates to a method for arranging sample powders when a sample tablet for XRFS analysis is pressed. The technical scheme is as follows: the square steel plates with a thickness of 2.0mm and 1.0mm are opened with the same corner holes and large round holes, and the large round holes of the square steel plate with a thickness of 2.0mm are provided with countersunk holes; The corner holes of a square steel plate are flexibly connected, the side with the countersunk hole is facing up, and a single layer of tissue sheets is laid flat between the two square steel plates to obtain a paper bottom sample tray. Place 1.5-2.0 g of boric acid on the lower pressure head in the silo of the tablet press, fill the paper bottom sample tray with the powder to be pressed and scrape it flat, and put the paper towel sample tray together with the powder sample to be pressed. Put it into the loading bin of the tablet press, and press the sample powder to be pressed and the paper bottom of the paper bottom loading tray to the loading bin of the tablet press from the upper plane of the paper towel loading tray with the pressing rod, that is, the sample powder is completed. arrangement. The invention has the characteristics of simple structure of the paper bottom sample loading tray, fast sample loading speed, small fluctuation of sample quality and high sample strength.

Description

technical field [0001] The invention belongs to the technical field of sample tablet compression for XRFS analysis. Specifically, it relates to a method for arranging sample powders when a sample tablet for XRFS analysis is pressed. Background technique [0002] In the application of X-ray fluorescence spectroscopy (XRFS) analysis technology, the preparation of sample pieces for analysis and measurement has always been a work with high technical content. At present, the mature sample preparation technologies include borate melting to prepare glass plate, induction furnace remelting to prepare metal plate and powder pressing method. Among them, the powder tableting method has a wide range of applications due to its high speed and low cost of preparing samples; in the tableting analysis, the particle size of the sample powder has an impact on the analysis results, the tableting rate and the strength of the sample tablet. have a greater impact. [0003] In order to improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/2202G01N23/2204
CPCG01N23/2202G01N23/2204
Inventor 徐建平李新家陈胜吴超超周双清邢文青
Owner WUHAN UNIV OF SCI & TECH
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