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Method for detecting acetonitrile content in composite solid propellant by using gas chromatography

A technology of solid propellant and gas chromatography, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of storage aging performance hazards, combustion performance, energy performance and mechanical performance adverse effects, etc., to achieve accurate measurement and good measurement effect , good peak effect

Pending Publication Date: 2021-04-13
内蒙合成化工研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The remaining acetonitrile will adversely affect the combustion performance, energy performance and mechanical performance, and may also bring potential harm to the storage aging performance in the future
At present, the determination method of residual acetonitrile in propellant slurry has not been reported yet, therefore, establishing an effective determination method to monitor the residual acetonitrile content in propellant slurry has certain practical significance

Method used

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  • Method for detecting acetonitrile content in composite solid propellant by using gas chromatography
  • Method for detecting acetonitrile content in composite solid propellant by using gas chromatography

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Embodiment 1

[0021] A method utilizing gas chromatography to detect acetonitrile content in composite solid propellant, comprising the steps:

[0022] S1: Preparation of internal standard solution

[0023] Weigh analytically pure grade acetonitrile into 100mL volumetric flasks, add tetrahydrofuran to dilute to constant volume, shake well, and prepare mass concentrations of 0.8mg / mL, 1.6mg / mL, 2.4mg / mL, 4.0mg / mL, 8.0 mg / mL acetonitrile solution in tetrahydrofuran, as the internal standard sample solution;

[0024] S2: Preparation of sample solution to be tested

[0025] Weigh about 2g of propellant slurry sample, put it into a 6mL reagent bottle, add 2.0mL of analytically pure tetrahydrofuran with a pipette, stir quickly, cover the bottle tightly, dissolve for about 12h, and take the supernatant as The sample solution to be tested;

[0026] S3: Selection of gas chromatography detection conditions

[0027] Chromatograph: SHIMADZU GC-2010-Pro gas chromatograph;

[0028] Chromatographic c...

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Abstract

The invention provides a method for detecting the content of acetonitrile in a composite solid propellant by using gas chromatography. The method comprises the following steps: preparing an internal standard solution, preparing a to-be-detected sample solution, selecting gas chromatography detection conditions, drawing a correction curve and detecting a to-be-detected sample. According to the invention, the content of the residual acetonitrile in the composite solid propellant can be accurately detected, and the method is good in measurement effect, accurate in measurement, simple, convenient, rapid, good in repeatability and suitable for measurement of trace components.

Description

technical field [0001] The invention relates to the field of detection of solid rocket motor composite solid propellant, in particular to a method for detecting the content of acetonitrile in composite solid propellant by gas chromatography. Background technique [0002] In the propellant used in a certain engine, the "wet addition" process of bonding agent is used. It first disperses the bonding agent in acetonitrile, and then mixes it with other components, and removes the solvent acetonitrile by vacuuming during the casting process. Most of the acetonitrile has evaporated, but the propellant is still a slurry mixture in which traces of acetonitrile may still remain. The remaining acetonitrile will adversely affect the combustion performance, energy performance and mechanical performance, and may also bring potential harm to the storage aging performance in the future. At present, there is no report on the determination method of residual acetonitrile in propellant slurr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/88
CPCG01N30/02G01N30/06G01N30/88G01N2030/025G01N2030/062G01N2030/884
Inventor 张翠珍王吉强张宇李杰郑晓林于科青陈志鸿
Owner 内蒙合成化工研究所
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