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Determination method of triaminoguanidine nitrate purity

A technique for determining the purity of triaminoguanidine nitrate and its method, which is applied in the field of purity analysis of chemical products, can solve the problem that the determination method for the precise purity of triaminoguanidine nitrate is not specific, and achieve the effect of simple and reliable determination method

Inactive Publication Date: 2019-04-05
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the prior art, there is no specific technical scheme for the assay method of the precise purity of triaminoguanidine nitrate

Method used

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  • Determination method of triaminoguanidine nitrate purity
  • Determination method of triaminoguanidine nitrate purity
  • Determination method of triaminoguanidine nitrate purity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]Take by weighing 2.0122g of the triaminoguanidine nitrate sample whose batch number is 201602, settle to 250ml aqueous solution, pipette 5.00ml sample solution in the 250mL conical flask, accurately add 0.01667mol / L potassium bromate solution 35.00ml, add sulfuric acid after stirring The acidity of the solution is controlled at c(H + )=3.2mol / L, seal tightly, add water liquid seal, stir and react for 10min, then add 3g potassium iodide, seal seal, add water liquid seal, react in the dark for 5min, obtain solution B; ml and 3g of potassium iodide were added to a 250mL Erlenmeyer flask, and sulfuric acid was added to control the acidity of the solution at c(H + ) = 3.2mol / L, sealed tightly, sealed with water, stirred for 5 minutes and reacted in the dark for 5 minutes to obtain solution C. Titrate solution B and solution C with 0.1mol / L sodium thiosulfate standard solution, when the solution fades from dark red to light yellow, add 1ml of starch indicator respectively, th...

Embodiment 2

[0055] Take by weighing batch number and be 201503 triaminoguanidine nitrate sample 1.9583g, other is with embodiment 1, calculate the purity of triaminoguanidine nitrate sample according to formula (1), the result is as shown in table 1.

Embodiment 3

[0057] Weigh 2.2231 g of triaminoguanidine nitrate coarse crystal 1# sample, and others are the same as in Example 1, calculate the purity of triaminoguanidine nitrate sample according to formula (1), and the results are shown in Table 1.

[0058] Table 1

[0059]

[0060] As can be seen from Table 1, adopting the method of the present invention can accurately measure the purity of triaminoguanidine nitrate, and the relative standard deviation is lower than 0.5%.

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Abstract

The invention discloses a determination method of triamino guanidine nitrate purity. The determination method of triamino guanidine nitrate purity comprises the following steps that (1) triamino guanidine nitrate isdecomposed, specifically, acidity of a solution is controlled by sulfuric acid, oxygenolysis is conducted on the triamino guanidine nitrate to generate N2 and CO2 through potassium bromate serving as a oxidizing agent in a certain acidity degree; (2) the excess potassium bromate is consumed, specifically, excess potassium iodide is added into the solution, the potassium iodidereactswith all materials which have stronger oxidation than iodine in the dark to generate iodine; (3) titration is conducted, specifically, a 0.1 mol / L sodium thiosulfate standard solution is used for titration to generate iodine, and meanwhile a blank experiment is conducted; and (4) triamino guanidine nitrate purity is calculated. According to the determination method of triamino guanidine nitrate purity, the deviation of the determined triamino guanidine nitrate purity relative to standard is smaller than 0.5%.

Description

technical field [0001] The invention relates to the technical field of purity analysis of chemical products, in particular to a method for measuring the purity of triaminoguanidine nitrate. Background technique [0002] Triaminoguanidine nitrate (TAGN) is an ionic compound, which forms a large π bond due to the delocalization of electrons in the cation, which improves the stability of the molecule; it has a high positive enthalpy of formation; the nitrogen content in the molecule is high, The content of carbon and hydrogen is low, it is easier to achieve oxygen balance, and the gas production is large during combustion and explosion. The products are mainly nitrogen, water and carbon dioxide gas. Rocket motor high energy smokeless propellants, gas generants and explosive additives. TAGN has high nitrogen content, and nitrogen exists in the form of hydrazine, which is thermodynamically favorable from the propellant point of view; in addition, TAGN has good thermal stability ...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N21/78G01N31/16
Inventor 赵华丽韦雪梅王敏刘治国程福银
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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