A kind of determination method of vaseline content in civil double-base gunpowder

Abstract

The invention discloses a determination method for the content of vaseline in civil double-base powder. The determination method sequentially comprises the following steps: processing a sample into flakes; fully rinsing the sample with a condensing extraction agent through circulating evaporation, and extracting the sample; directly drying the extraction agent by distillation with extracted extraction liquid, so as to obtain an extract; adding excessive tetrahydrofuran, dissolving Vaseline in the extract, transferring to a volumetric flask, making up to volume by using tetrahydrofuran; accurately transferring the liquid to another volumetric flask; adding an acetonitrile water solution, separating out the Vaseline, making up to volume and shaking well; determining the absorbancy of a turbid liquid; and calculating the content of the Vaseline according to the determined absorbancy and a standard curve. According to the method, influence factors on the analysis result are few; the precision and the accuracy of the determination result are good; and the method is relatively high in accuracy on the determination result of the low-content Vaseline.

Description

technical field [0001] The invention belongs to the technical field of organic matter analysis and determination, and in particular relates to the determination of vaseline content in civil double-base gunpowder. Background technique [0002] The main components of civilian double-base gunpowder are: nitrocellulose, nitroglycerin, vaseline, inorganic catalysts and plasticizers such as dinitrotoluene. Vaseline is a common component in double-base gunpowder, and its content is generally less than 2%. Weighing method for analysis, the specific operation steps are: extract the gunpowder to obtain the extract, then wash the extract with 75% acetic acid solution for 3 to 5 times, and filter out nitroglycerin and dinitrogen except vaseline with a sand core funnel. Toluene and other components, use ether to dissolve the residue in the vaseline washing funnel and collect it in the original vaseline beaker, evaporate the ether and residual acetic acid aqueous solution on a water bath,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new measuring method for the problems of many influencing factors of the above-mentioned analysis results, large fluctuations of the measuring results, and low accuracy of the measuring results of low-content vaseline.

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