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Sulfur-containing standard substance as well as preparation method and application thereof

A standard substance and standard value technology, applied in the field of chemical metrology, can solve the problem that the carbon-sulfur meter cannot meet the analysis requirements, and achieve the effect of meeting the needs of rapid analysis in front of the furnace, reducing costs, and improving accuracy.

Pending Publication Date: 2021-07-30
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, carbon-sulfur analyzers cannot meet the requirements of furnace analysis and can only wait for

Method used

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  • Sulfur-containing standard substance as well as preparation method and application thereof
  • Sulfur-containing standard substance as well as preparation method and application thereof
  • Sulfur-containing standard substance as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Preparation of standard materials

[0056] 1. Preparation of Flux

[0057] Select 1.5 parts of pure tungsten powder, 0.5 parts of pure iron powder, mix well, press and form, sinter to obtain sintered material, take the sintered material granules with a particle size of 20 mesh to 40 mesh, and select 0.2 part of tin particles with a particle size of 20 mesh to 60 mesh , 0.2 parts of 60-300-mesh vanadium pentoxide, mixed with the prepared sintered pellets, and calcined at 800°C-1100°C to obtain a flux.

[0058] 2. Crush, mix and sieve the flux to obtain candidates.

[0059] 3. In accordance with the "Technical Specifications for Primary Standard Substances" (JJF 1006-1994), the candidate was subjected to homogeneity test, stability test, fixed value, determination of standard value and estimation of total uncertainty. The final result showed that the candidate Good material uniformity and stability, the standard value of sulfur S: 0.00010% ± 0.00001%.

[0060] (1) U...

Embodiment 2

[0139] 1. Preparation of standard materials

[0140] 1. Preparation of Flux

[0141] Select 2.0 parts of pure tungsten powder and 1 part of pure iron powder, mix well, press and form, and sinter to obtain a sintered product. The obtained sintered product is crushed and sieved, and the sintered product particles with a particle size of 20 mesh to 40 mesh are taken. 0.5 parts of copper particles with a particle size of 20 mesh to 60 mesh, mixed with the prepared sintered material pellets, and calcined at 1350°C to 1400°C to obtain a flux;

[0142] 2. Crush, mix and sieve the flux to obtain candidates;

[0143] 3. In accordance with the "Technical Specifications for Primary Standard Substances" (JJF 1006-1994), the candidate was tested for homogeneity, stability, fixed value, standard value and total uncertainty. The final result showed that the candidate Good material uniformity and stability, the standard value of sulfur S: 0.00040% ± 0.00003%.

[0144] (1) Uniformity test ...

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Abstract

The invention relates to the technical field of stoichiometry, in particular to a sulfur-containing standard substance and a preparation method and application thereof. The invention provides a sulfur-containing standard substance. The content of sulfur is 0.00002%-0.0005% by mass. The standard substance has the fluxing performance of a fluxing agent, and sulfur in the standard substance is completely released under the measurement condition. According to the method for preparing the standard substance, an extremely simple and convenient carbon and sulfur instrument initialization method is developed by using the standard substance. Meanwhile, the standard substance is used for analyzing a sulfur-containing sample, so that the sulfur analysis accuracy and precision can be remarkably improved, the sulfur analysis speed is unexpectedly improved, and the demand of on-the-spot quick analysis is met.

Description

technical field [0001] The invention relates to the technical field of stoichiometry, in particular to a sulfur-containing standard substance and its preparation method and application. Background technique [0002] A standard substance is a substance or material that has been determined to have one or more sufficiently uniform characteristic values. As a "gauge" in the analysis and measurement industry, it plays an indispensable role in analysis work. Now, there are already a large number of reference materials to choose from. In terms of state, standard substances include solid, liquid, gas and other types. In the analysis process, carbon-sulfur meter calibration and sample measurement usually use the same or similar matrix (brand) standard material, therefore, the standard material is produced in combination with the corresponding product analysis requirements. [0003] The preparation technology of reference materials is very mature, and there are corresponding product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/2022G01N1/28G01N1/38
CPCG01N33/2022G01N1/286G01N1/38
Inventor 韦建环
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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