Method for sample preparation of viscous solid substance and porous sample preparation mold used in the method

Abstract

The invention provides a sample-preparing method for viscous solid substances. The method comprises: respectively putting a certain amount of and at least one viscous solid substance in a plurality of through-holes of a multihole sample-preparing plate, and proceeding tabletting in a tablet press. Thus a plurality of viscous solid substance samples loaded in the multihole sample-preparing plate are obtained, wherein the multihole sample-preparing plate has the same thickness with the samples to be made. The invention also relates to a multihole sample-preparing mould used for at least one viscous solid substance.

Description

technical field [0001] The invention relates to a sample preparation method for viscous solid substances such as rubbery polymers and a porous sample preparation mold used in the method. The prepared samples can be used for analysis and determination of low-content components, such as infrared qualitative and quantitative analysis. Background technique [0002] In the field of chemical engineering, when it is necessary to analyze and measure the components of a certain chemical substance, it is usually necessary to use a sample of the substance. Solid samples exist in various forms and have different testing purposes, so there are various solid sample preparation methods. The most commonly used are halide pellets, pastes, and films. For the halide tableting method, the most commonly used halide tableting matrix is ​​potassium bromide, which is completely transparent in the mid-infrared region and can become a transparent tablet under high pressure. Generally, the sample u...

AI Technical Summary

Problems solved by technology

[0003] In particular, it should be pointed out that for viscous solid substances, due to its high viscosity and easy deformation characteristics, when using the above-mentioned tablet method to prepare samples, on the one hand, it is difficult to take it out from the mold due to its high viscosity; This removal operation will also cause a large deformation of the sample, which will affect the analysis results and lead to inaccurate analysis results.

In addition, the above-mentioned tableting method cannot guarantee the thickness of the sample, but must be measured for the thickness of the sample. However, due to the high viscosity and easy deformation of the viscous solid substance, the measurement of its thickness is very difficult, so the above-mentioned tableting method cannot guarantee the thickness of the sample. accuracy, which will also affect the accuracy of the analysis results

[0004] In addition, potassium bromide was used to dilute the sample to be tested in the above tablet method, which may be feasible for the analysis of higher component content, but for low component content, such as as low as 0.5% to 3.3% (mol) Butyl rubber unsaturation, which is difficult to measure accurately with analytical instruments after further dilution with potassium bromide

Images