untitled
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<responseDate>2015-02-24T11:44:24Z</responseDate>
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<identifier>oai:HAL:hal-01103120v1</identifier>
<datestamp>2015-02-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>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.</title>
<creator>Alinat, Elodie</creator>
<creator>Delaunay, Nathalie</creator>
<creator>Archer, Xavier</creator>
<creator>Mallet, Jean-Maurice</creator>
<creator>Gareil, Pierre</creator>
<contributor>Laboratoire de l'Intégration du Matériau au Système - IMS (Bordeaux, France) ; Université de Bordeaux (UB)</contributor>
<contributor>Laboratoire des biomolécules (LBM) ; CNRS - Université Pierre et Marie Curie - Paris 6 (UPMC) - École normale supérieure - Paris (ENS Paris)</contributor>
<contributor>Dynamique des écosystèmes Caraïbe et biologie des espèces associées (DYNECAR EA 926) ; Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>Université Pierre et Marie Curie - Paris 6 (UPMC)</contributor>
<description>International audience</description>
<source>Journal of Hazardous Materials</source>
<publisher>Elsevier</publisher>
<identifier>hal-01103120</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01103120</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01103120</source>
<source>Journal of Hazardous Materials, Elsevier, 2014, pp.92-99</source>
<identifier>PUBMED : 25562808</identifier>
<language>en</language>
<subject>[CHIM.ORGA] Chemical Sciences/Organic chemistry</subject>
<type>Journal articles</type>
<description lang=en>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 (1h for alkaline hydrolysis, 3min 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 1M sodium hydroxide for 1h at 60°C).</description>
<date>2014-12-19</date>
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