A new method for the determination of the nitrogen content of nitrocellulose based on the molar ratio of nitrite-to-nitrate ions released after alkaline hydrolysis
| Autor: | Xavier Archer, Jean-Maurice Mallet, Nathalie Delaunay, Pierre Gareil, Elodie Alinat |
|---|---|
| Přispěvatelé: | Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques (PECSA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC), Université Paris sciences et lettres (PSL), Central laboratory of police prefecture (LCPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Electrophoresis
Environmental Engineering Nitrogen Health Toxicology and Mutagenesis chemistry.chemical_element 02 engineering and technology 01 natural sciences Concentration ratio chemistry.chemical_compound Hydrolysis Capillary electrophoresis Nitrocellulose Sodium Hydroxide Environmental Chemistry Nitrite Nitrogen content Waste Management and Disposal Alkaline hydrolysis Nitrites Ions Nitrates Molar mass Chromatography Chemistry 010401 analytical chemistry Temperature Collodion Electrophoresis Capillary Reproducibility of Results [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences Smokeless gunpowder Kinetics Sodium hydroxide 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials Journal of Hazardous Materials, 2015, 286, pp.92-99. ⟨10.1016/j.jhazmat.2014.12.032⟩ Journal of Hazardous Materials, Elsevier, 2015, 286, pp.92-99. ⟨10.1016/j.jhazmat.2014.12.032⟩ |
| ISSN: | 0304-3894 1873-3336 |
| DOI: | 10.1016/j.jhazmat.2014.12.032⟩ |
| Popis: | International audience; A new method was proposed to determine the nitrogen content of nitrocelluloses (NCs). It is based on the finding of a linear relationship between the nitrogen content and the molar ratio of nitrite-to-nitrate ions released after alkaline hydrolysis. Capillary electrophoresis was used to monitor the concentration of nitrite and nitrate ions. The influences of hydrolysis time and molar mass of NC on the molar ratio of nitrite-to-nitrate ions were investigated, and new insights into the understanding of the alkaline denitration mechanism of NCs, underlying this analytical strategy is provided. The method was then tested successfully with various explosive and non-explosive NC-containing samples such as various daily products and smokeless gunpowders. Inherently to its principle exploiting a concentration ratio, this method shows very good repeatability in the determination of nitrogen content in real samples with relative standard deviation (n = 3) inferior to 1.5%, and also provides very significant advantages with respect to sample extraction, analysis time (1 h for alkaline hydrolysis, 3 min for electrophoretic separation), which was about 5 times shorter than for the classical Devarda's method, currently used in industry, and safety conditions (no need for preliminary drying NC samples, mild hydrolysis conditions with 1 M sodium hydroxide for 1 h at 60 °C). |
| Databáze: | OpenAIRE |
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