Method for analyzing particles deposited on filter disc and sample preparation and analysis equipment thereof

A technology for sample preparation and particle deposition, which is used in the analysis of materials, material analysis by optical means, measurement devices, etc., and can solve problems such as inability to ensure particles, inability to detect transparent particles and particles of the same color of the filter, and inability to detect particles. , to achieve the effect of reducing refraction

Pending Publication Date: 2022-04-12
阅美测量系统(中国)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these filters have the same problem as light colored (white) filters, almost impossible to detect clear particles and particles of the same color as the filter
They always have the disadvantage that not all particles can be detected on the same filter
Using two light sources for analysis, one of which produces visible light and the other produces UV light, can increase the reliability of the analysis, but still does not ensure that all particles are detected, such as transparent particles and particles of the same color as the filter

Method used

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  • Method for analyzing particles deposited on filter disc and sample preparation and analysis equipment thereof
  • Method for analyzing particles deposited on filter disc and sample preparation and analysis equipment thereof
  • Method for analyzing particles deposited on filter disc and sample preparation and analysis equipment thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: Based on pair indication figure 1 The analysis of middle filter 1 is described. signal figure 1 , 2 , 3, and 5 demonstrate the first method, using incident light microscopy to analyze deposited particles.

[0047] In order to analyze the filter 1 containing the particles 3, 5, 6, 7 in an optical microscope, the particles 3, 5, 6, 7 need to be fixed on the filter 1 first and the light transmittance of the filter 1 should be increased.

[0048] signal figure 2 0.3 ml of ethylamine nitrate solution 15 was applied to the glass carrier provided in the form of a double-sided slide 8 in order to form droplets 9 . A water-diluted ethylamine nitrate solution 15 was obtained by mixing ethylamine nitrate and water in a 2:1 ratio, and ethylamine nitrate could also be applied undiluted to the glass support. The water-diluted ethylamine nitrate solution 15 has the following advantage over the undiluted ethylamine nitrate solution: its particularly lower viscosity,...

Embodiment 2

[0057] Example 2: Schematic Figure 6 to Figure 8 Another method is shown in which the filter disc 1 is placed on a glass slide 210 instead of the double-sided slide 8 and a solution of ethylamine nitrate 205 diluted with water is applied to the top 2 of the filter disc 1 . The filter 1 is then covered with a cover glass 11 and analyzed with a transmission optical microscope 200 .

[0058] signal Figure 6 The procedure for applying a water-diluted ethylamine nitrate solution to filter disc 1 is shown. In order to avoid the ionic liquid covering the particles 3, 5, 6, 7, the application should be done at the edge of the filter disc or at another point. Preferably the ionic liquid is applied at the edge of the top 2 of the filter or at a position not covered by the particles 3 , 5 , 6 , 7 . Apply until the water-diluted ethylamine nitrate solution 205 spreads to wet the entire filter disc.

[0059] signal Figure 7 , cover the filter 1 with a cover glass 11 and bake it at ...

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Abstract

The invention discloses a method for analyzing particles deposited on a filter disc and sample preparation analysis equipment thereof, which comprises the filter disc, the particles, a background, ionic liquid, a device for automatically analyzing the particles deposited on the filter disc and an optical microscope, and is characterized in that the filter disc mainly comprises a filter membrane, but also comprises an adhesive carrier layer, such as a settlement point for use; the particles comprise black particles, white particles, transparent particles and gray particles, the backgrounds are divided into two groups, namely a light white first background and a light black second background, and the light black background and the light white background are divided into two grades according to the color depth. According to the method for analyzing the particles deposited on the filter disc, the filter disc with increased light transmission can be used for optical analysis, because the filter disc with increased transparency can be obtained by using existing knowledge and cheap resources, the method is simple and cheap, and the use of the ionic liquid makes the same filter disc easier to detect by using an optical microscope and an SEM-EDX system.

Description

technical field [0001] The invention relates to the technical field of analyzing particles deposited on a filter disc, and discloses a method for analyzing particles deposited on a filter disc and a sample preparation and analysis device thereof. Background technique [0002] Determining the technical cleanliness of a product or part as well as determining the cleanliness of the production environment or manufacturing process (monitoring particles as an important part) is one of the standard tools of quality assurance in many industrial fields. Most of the commonly used optical microscopes are based on automatic identification of the number of particles. The advantage of using light microscopy to detect technical cleanliness is that particle counts allow simultaneous measurement and property classification of the analyzed particles. Therefore, the use of distinguishing between metal particles, non-metal particles and particle morphology is an important factor in judging the...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/94
Inventor 马俊安
Owner 阅美测量系统(中国)有限公司
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