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Method for determining content of water in sample in process of preparing composite solid propellant

A solid propellant and preparation process technology, applied in the field of physical and chemical analysis, can solve the problems of difficulty in sample introduction, easy adhesion to the test electrode, inability to uniformly disperse the test medium, etc., to achieve good dispersion, good effect, and conducive to sample injection. Effect

Active Publication Date: 2014-09-17
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Karl Fischer method is generally used to test the trace moisture of solid or liquid materials. The composite solid propellant slurry is a viscous substance mixed with solid and liquid. It is difficult to inject samples and cannot be evenly dispersed in the test medium, and it is easy to adhere to the test electrode. , resulting in the inability to accurately measure the trace moisture in the sample

Method used

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  • Method for determining content of water in sample in process of preparing composite solid propellant
  • Method for determining content of water in sample in process of preparing composite solid propellant

Examples

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Embodiment 1

[0024] A method for assaying the moisture content of a sample during the preparation of a composite solid propellant, mainly comprising the following steps,

[0025] 1) Turn on the Karl Fischer moisture meter, titrate and remove the moisture in the methanol, then add chloroform reagent to the methanol, and titrate the chloroform moisture content, which is 0.0070%;

[0026] 2) Mix methanol and chloroform in a weight ratio of 1:1 to 1.5 as a titration solvent, add it to a titration cup, automatically add Karl Fischer solution through a Karl Fischer moisture meter, titrate to the end point, and remove the moisture in the titration solvent;

[0027] 3) Weigh the sample to be tested, take a clean 5mL syringe, weigh 0.1000g±0.0100g of the slurry sample, and place it in the syringe, accurate to 0.0001g, which are 0.1175g and 0.1135g respectively;

[0028] 4) To prepare the sample solution, add 3mL of analytically pure chloroform to the syringe containing the sample slurry, and at the...

Embodiment 2

[0035] A method for assaying the moisture content of a sample during the preparation of a composite solid propellant, mainly comprising the following steps,

[0036] 1) Turn on the Karl Fischer moisture meter, remove the moisture in the methanol by titration, then add chloroform reagent to the methanol, and titrate the chloroform moisture content, which is calculated as 0.0044%;

[0037] 2) Mix methanol and chloroform in a weight ratio of 1:1.2 as a titration solvent, add it to a titration cup, automatically add Karl Fischer solution through a Karl Fischer moisture meter, titrate to the end point, and remove the moisture in the titration solvent;

[0038] 3) Weigh M1g of the sample to be tested, accurate to 0.0001g, put it in the syringe for later use, weigh two samples, and M1 is calculated as 0.1061g and 0.1036g respectively;

[0039] 4) Add accurately weighed M2g chloroform to the syringe of step 3), accurate to 0.0001g, then seal the needle of the syringe, put the syringe ...

Embodiment 3

[0045] A method for assaying the moisture content of a sample during the preparation of a composite solid propellant, mainly comprising the following steps,

[0046] 1) Turn on the Karl Fischer moisture meter, titrate and remove the moisture in the methanol, then add chloroform reagent to the methanol, and titrate the chloroform moisture content, which is 0.0070%;

[0047] 2) Mix methanol and chloroform in a weight ratio of 1:1.5 as a titration solvent, add it to a titration cup, automatically add Karl Fischer solution through a Karl Fischer moisture meter, titrate to the end point, and remove the moisture in the titration solvent;

[0048] 3) Weigh M1g of the sample to be tested, accurate to 0.0001g, put it in the syringe for later use, weigh two samples, and M1 is calculated as 0.1020g and 0.1311g respectively;

[0049] 4) Add accurately weighed M2g chloroform to the syringe of step 3), accurate to 0.0001g, then seal the needle of the syringe, place the syringe in a containe...

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Abstract

The invention provides a method for determining the content of water in a sample in a process of preparing a composite solid propellant. The content of the water in the sample is measured by adopting a Karl-Fischer moisture meter; when a sample solution is prepared, the sample is dissolved and dispersed by adopting trichloromethane; when the content of the water in the sample is determined, the sample solution is further dispersed by a titration solvent of methyl alcohol and trichloromethane without causing agglomeration, thus the sample feeding problem is solved; a reagent for dissolving and dispersing the sample does not react with a Karl-Fischer reagent or the reaction between the reagent and the Karl-Fischer reagent is interfered. According to the method, the content of the water is determined, the water in the sample can be rapidly determined, the determination time can be controlled to be within 20 min, a testing result is accurate, online detection can be realized, and excellent popularization and application values are achieved.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical analysis, and in particular relates to a method for measuring the water content of a sample in the preparation process of a composite solid propellant. Background technique [0002] Composite solid propellant is a composite material prepared by mixing, pouring, solidifying and molding the raw material components according to the ratio. During the mixing process, a solid-liquid mixture will be formed, which is viscous. Research has found that the solid-liquid mixture contains a certain amount of moisture, and the presence of moisture will directly affect the performance of the product. Therefore, measures need to be taken to remove the moisture, and it is very important to know its moisture content. [0003] The Karl Fischer method is generally used to test the trace moisture of solid or liquid materials. The composite solid propellant slurry is a viscous substance mixed with solid a...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N31/16
Inventor 廖建苹张华燕韩清徐红菊
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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