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Alinat E, Jemmali S, Delaunay N, Archer X, Gareil P. Analysis of underivatized cellodextrin oligosaccharides by capillary electrophoresis with direct photochemically induced UV-detection. Electrophoresis 2015; 36:1555-63. [DOI: 10.1002/elps.201400605] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/12/2015] [Accepted: 03/14/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Elodie Alinat
- PSL Research University; ESPCI ParisTech, Laboratory of Analytical and Bioanalytical Sciences, and Miniaturization (LSABM); Paris France
- Central Laboratory of Police Prefecture (LCPP); Paris France
- CNRS; CBI; UMR 8231 Paris France
| | - Selma Jemmali
- PSL Research University; ESPCI ParisTech, Laboratory of Analytical and Bioanalytical Sciences, and Miniaturization (LSABM); Paris France
- CNRS; CBI; UMR 8231 Paris France
| | - Nathalie Delaunay
- PSL Research University; ESPCI ParisTech, Laboratory of Analytical and Bioanalytical Sciences, and Miniaturization (LSABM); Paris France
- CNRS; CBI; UMR 8231 Paris France
| | - Xavier Archer
- Central Laboratory of Police Prefecture (LCPP); Paris France
| | - Pierre Gareil
- PSL Research University; ESPCI ParisTech, Laboratory of Analytical and Bioanalytical Sciences, and Miniaturization (LSABM); Paris France
- CNRS; CBI; UMR 8231 Paris France
- PSL Research University; Chimie ParisTech; Paris France
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Alinat E, Delaunay N, Archer X, Vial J, Gareil P. Multivariate optimization of the denitration reaction of nitrocelluloses for safer determination of their nitrogen content. Forensic Sci Int 2015; 250:68-76. [DOI: 10.1016/j.forsciint.2015.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 02/26/2015] [Accepted: 03/03/2015] [Indexed: 11/16/2022]
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Alinat E, Delaunay N, Archer X, Gareil P. Correlating molar masses of nitrocelluloses with their intrinsic viscosities measured using capillary electrophoresis instrumentation. Carbohydr Polym 2015; 128:99-104. [PMID: 26005144 DOI: 10.1016/j.carbpol.2015.04.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 03/30/2015] [Accepted: 04/12/2015] [Indexed: 10/23/2022]
Abstract
Specific viscosities for a set of six nitrocellulose (NC) standards comprising three different mass-average molar masses (between 20,000 and 300,000 g mol(-1)) of two different nitrogen contents (11.2 and 12.1%) were measured at 20 °C in tetrahydrofuran, using capillary electrophoresis instrumentation as a bench-top viscometer in frontal mode. Intrinsic viscosities were derived applying Huggins' and Kraemer's models, showing excellent convergence of both models at infinitely diluted polymer concentration. Good overall consistency was shown between viscosity data experimentally acquired by this new protocol and the mass-average molar masses provided by the manufacturers. This simple protocol should be of interest for a better understanding of the solvent interaction given by this complex polymer, and beyond this, for tailoring NC solutions devoted to film deposition, and for the determination of mass-average molar masses of unknown NC samples.
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Affiliation(s)
- Elodie Alinat
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris, France; CNRS, UMR 7195, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Université, UPMC, Université Paris 6, 4 Place Jussieu, 75005 Paris, France.
| | - Nathalie Delaunay
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; CNRS, UMR 7195, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Université, UPMC, Université Paris 6, 4 Place Jussieu, 75005 Paris, France.
| | - Xavier Archer
- Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris, France.
| | - Pierre Gareil
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; CNRS, UMR 7195, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Université, UPMC, Université Paris 6, 4 Place Jussieu, 75005 Paris, France.
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Alinat E, Delaunay N, Archer X, Mallet JM, Gareil P. 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. J Hazard Mater 2015; 286:92-99. [PMID: 25562808 DOI: 10.1016/j.jhazmat.2014.12.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 12/09/2014] [Accepted: 12/17/2014] [Indexed: 06/04/2023]
Abstract
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, 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 1M sodium hydroxide for 1h at 60 °C).
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Affiliation(s)
- Elodie Alinat
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris, France; CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris, France.
| | - Nathalie Delaunay
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris, France.
| | - Xavier Archer
- Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris, France.
| | - Jean-Maurice Mallet
- École Normale Supérieure-PSL Research University, Département de Chimie, 24 rue Lhomond, 75005 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris, France; CNRS, UMR 7203 LBM, F-75005 Paris, France.
| | - Pierre Gareil
- PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris, France; CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris, France.
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Alinat E, Delaunay N, Przybylski C, Daniel R, Archer X, Gareil P. Capillary electrophoresis fingerprinting of 8-aminopyrene-1,3,6-trisulfonate derivatized nitrocellulose after partial acid depolymerization. J Chromatogr A 2015; 1387:134-43. [DOI: 10.1016/j.chroma.2015.01.092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 01/23/2015] [Accepted: 01/29/2015] [Indexed: 10/24/2022]
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Alinat E, Delaunay N, Costanza C, Archer X, Gareil P. Determination of the nitrogen content of nitrocellulose by capillary electrophoresis after alkaline denitration. Talanta 2014; 125:174-80. [DOI: 10.1016/j.talanta.2014.02.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/25/2014] [Accepted: 02/27/2014] [Indexed: 10/25/2022]
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