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A method for measuring the water content of mixed nitrates of butanetriol trinitrate and nitroglycerin by hydrogen nuclear magnetic resonance spectroscopy

A technology of butanetriol trinitrate and proton nuclear magnetic resonance spectroscopy, which is applied in the fields of nuclear magnetic resonance analysis, material analysis through resonance, and measuring devices, can solve cumbersome methods, high cost of quantitative analysis, simple and rapid testing Limitations in demand and other issues, to achieve the effect of less dosage, simple and rapid testing, and high sensitivity

Active Publication Date: 2021-07-27
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a relative measurement method, near-infrared spectroscopy has high test sensitivity, but its calibration requires one-to-one corresponding standard substances, and corresponding working curves are drawn. The corresponding quantitative analysis is also costly and cumbersome. For simple and rapid testing Requirements are also limited

Method used

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  • A method for measuring the water content of mixed nitrates of butanetriol trinitrate and nitroglycerin by hydrogen nuclear magnetic resonance spectroscopy
  • A method for measuring the water content of mixed nitrates of butanetriol trinitrate and nitroglycerin by hydrogen nuclear magnetic resonance spectroscopy
  • A method for measuring the water content of mixed nitrates of butanetriol trinitrate and nitroglycerin by hydrogen nuclear magnetic resonance spectroscopy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] BTTN / NG mixed nitrate 1 Establishment of HNMR spectrum

[0031] 1.1 Instruments and samples

[0032] BrukerAscend 800 superconducting nuclear magnetic resonance spectrometer (German BRUKER company); MettlerToledoXP6 type one hundred thousandth balance (Switzerland METTLER company); deuterated dimethyl sulfoxide (deuterated degree > 99.8%, American CIL company); 5mm Standard NMR sample tube (NORELL, USA); Benzene purity standard substance (Tianjin Metrology Supervision and Testing Science Research Institute, batch number 0401); BTTN / NG mixed nitrate (Xi’an Institute of Modern Chemistry, batch number 180410)

[0033] 1.2 Preparation and determination of samples to be tested

[0034] Accurately weigh 5-15mg of the internal standard benzene standard substance into a 5mm NMR tube, then add 0.5ml deuterated dimethyl sulfoxide, mix well and seal with a parafilm, and use the prepared NMR sample directly for 1 HNMR test. After the test is over, remove the NMR sample tube tha...

Embodiment 2

[0050] Determination of Moisture Content in Different Batches of BTTN / NG Mixed Nitrate by H NMR Spectroscopy

[0051] Accurately weigh 5.0mg of internal standard benzene into a 5mm NMR tube, then add 0.5ml deuterated dimethyl sulfoxide, mix well and seal with a parafilm, and use the prepared NMR sample directly for 1 HNMR test, test parameters and conditions are: observation frequency 800.3MHz, measurement temperature 300K, 90° pulse, spectrum width 3μs, sampling data points 65536, number of scans 32 times, delay time 30s. Then remove the NMR sample tube after the test, add 10.8mg of mixed nitrates and mix thoroughly, seal with a parafilm, and then test the sample under the same test conditions 1 H NMR test. According to the same method, three batches of different batches of BTTN / NG mixed nitrate samples were detected, the NMR spectra were recorded, and the moisture content was calculated. The results are shown in Table 3 below.

[0052] Table 3 Determination of moisture con...

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Abstract

The invention discloses a method for measuring the moisture content of mixed nitrates of butanetriol trinitrate (BTTN) and nitroglycerin (NG) by hydrogen nuclear magnetic resonance spectroscopy. The quantitative detection of trace moisture is realized based on the hydrogen nuclear magnetic resonance internal standard method. The steps include: (1) the configuration of the internal standard sample solution and the proton nuclear magnetic resonance spectrum detection; (2) the addition of the mixed nitrate sample to be tested and the proton nuclear magnetic resonance spectrum detection; (3) the analysis of each feature in the proton nuclear magnetic resonance spectrum The peaks are assigned, the characteristic peaks of water and the characteristic peaks of the internal standard are determined, and they are respectively integrated, and substituted into the relevant formula to calculate the corresponding water content. This method has the advantages of good safety, simple operation, small sample volume and good repeatability, etc. It can quickly and quantitatively detect the water content in mixed nitrates of butanetriol trinitrate (BTTN) and nitroglycerin (NG). Targeted solutions to the key issues related to quality control in the application of explosives.

Description

technical field [0001] The invention belongs to the field of measurement and detection of energetic materials, in particular to a method for measuring the water content of mixed nitrates of butanetriol trinitrate (BTTN) and nitroglycerin (NG) by hydrogen nuclear magnetic resonance spectroscopy, and belongs to the field of analysis and detection of propellant and explosive products. Background technique [0002] As an excellent plasticizer, nitrate esters are widely used in the fields of double-base propellants and composite propellants due to their better oxygen balance and good combustion and explosive properties. It is not only a good plasticizer for nitrocellulose, but also the main energy component in the propellant composition. It plays an important role in making semi-rigid nitrocellulose into extrudable materials and reducing the glass transition temperature. Indispensable important component. Especially in the high-energy nitrate plasticized polyether (NEPE) propell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
CPCG01N24/084
Inventor 刘可王民昌苏鹏飞徐敏张皋常海潘清陈智群张丽涵
Owner XIAN MODERN CHEM RES INST
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