Quantitative analysis method of nitrocellulose component in propellant
A quantitative analysis, nitrocellulose technology, applied in the direction of material inspection products, fuel oil testing, etc., can solve the problems of large error in analysis results, slow speed, and many operation steps, and achieve the effect of rapid measurement and guaranteed accuracy.
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[0032] Example 1: Determination of nitrocellulose component content in XX main charge:
[0033] 1) Use a spatula to process the XX main charge sample into a flower sheet, the thickness of which is less than 2mm, accurately weigh 1g and place it in a No. 3 filter cup with constant weight, extract with ether for 2h, and the extraction temperature is 58℃;
[0034] 2) Place the No. 3 filter cup in a drying oven at 100°C±5°C for 1 hour, then place it in a desiccator to cool naturally for 30 minutes, weigh it, and record the quality;
[0035] 3) Insoluble matter is directly used for quantification of nitrogen with a large injection volume element analyzer, injection volume: 80mg, combustion method: two-stage combustion; according to formula (1) to calculate the content of nitrocellulose in the main charge of XX, And compare with the result of subtraction method, the specific data are shown in Table 1.
[0036] Table 1 The content of nitrocellulose components in the main charge of XX
[0037]
Example Embodiment
[0038] Example 2: Determination of the content of nitrocellulose in XX battery life medicine:
[0039] 1) Use a spatula to process the XX battery life medicine sample into a flower sheet, the thickness of which is less than 2mm, accurately weigh 1g and place it in a No. 3 filter cup with constant weight, extract with isopropyl ether for 2h, and the extraction temperature is 70℃;
[0040] 2) Place the No. 3 filter cup in a drying oven at 100°C for 1 hour, then place it in a desiccator to cool naturally for 30 minutes, weigh it, and record the quality;
[0041] 3) Insoluble matter is directly used for quantification of nitrogen with a large injection volume element analyzer, injection volume: 100mg, combustion method: two-stage combustion; using formula (1) to calculate the content of nitrocellulose in XX battery life medicine, And compare with the result of subtraction, the specific data are shown in Table 2.
[0042] Table 2 The content of nitrocellulose components in XX battery life med
Example Embodiment
[0044] Example 3
[0045] The content of nitrocellulose in XX propellant containing ammonium perchlorate
[0046] 1) Use a spatula to process the XX propellant sample containing ammonium perchlorate into a flake shape, the thickness of which is less than 2mm, accurately weigh 1g into the No. 3 filter cup with constant weight, and mix with isopropyl ether and ether. Solvent extraction for 2 hours, extraction temperature is 60 ℃, wherein the volume ratio of ethyl ether and isopropyl ether 2:1;
[0047] 2) Transfer all the ether and isopropyl ether insolubles in the No. 3 filter cup to the beaker, add 30 mL of warm water, soak for 40 minutes, and keep the water temperature at 50°C;
[0048] 3) Transfer all the insolubles in the beaker after soaking in water to the original No. 3 filter cup, wash 4 times with water, drain it, dry it in a drying oven at 100℃±5℃ for 1h, then place it in a desiccator to cool naturally 30min, weigh, record the quality;
[0049] 4) Insoluble matter is directly us
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