Quantification of 4-Methylimidazole in Class III and IV Caramel Colors: Validation of a New Method Based on Heart-Cutting Two-Dimensional Liquid Chromatography (LC-LC)

Autor: Cédric Moretton, J. L. Rocca, Gérard Crétier, Henri Nigay

Publikováno v: Journal of Agricultural and Food Chemistry
Journal of Agricultural and Food Chemistry, American Chemical Society, 2011, 59 (8), pp.3544-3550. ⟨10.1021/jf104464f⟩

International audience; 4-Methylimidazole (4MeI) is a nitrogen compound formed during the manufacture of class III and IV caramel colors. The European Commission has limited its content to 250 ppm. Two methods were compared to perform 4MeI quantifica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9087931d590fc716de3126791efc23ab
https://doi.org/10.1021/jf104464f

Influence of the hydrothermal treatment on the chromatographic properties of monolithic silica capillaries for nano-liquid chromatography or capillary electrochromatography

Autor: R. Roux, D. Brunel, Julien Iapichella, Claire Demesmay, J. L. Rocca, Anne Galarneau, Guillaume Puy

Publikováno v: Journal of Chromatography A
Journal of Chromatography A, Elsevier, 2007, 1160 (1-2), pp.150-159. ⟨10.1016/j.chroma.2007.05.019⟩

In the last decade, silica monolithic capillaries have focused more and more attention on miniaturized separation techniques like capillary electrochromatography (CEC), nano-liquid chromatography (nano-LC) and chip electrochromatography owing to thei

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14846ed142f41669a4eb8a07b846b9b9
https://doi.org/10.1016/j.chroma.2007.05.019

Development of acrylate-based monolithic stationary phases for electrochromatographic separations

Autor: Nathalie Delaunay-Bertoncini, J. L. Rocca, Marie-Pierre Barrioulet, Claire Demesmay

Publikováno v: ELECTROPHORESIS. 26:4104-4115

Organic monolithic stationary phases were synthesized in fused-silica capillaries. They were prepared by in situ polymerization under UV irradiation of various alkyl acrylates, 1,3-butanediol diacrylate, and 2-acrylamido-2-methyl-1-propanesulfonic ac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da56913688661ea74b4c7a7bb2e76388
https://doi.org/10.1002/elps.200500251

Separation of phenylureas by capillary electrochromatography on porous graphitic carbon

Autor: R. Al Rifai, Claire Demesmay, J. L. Rocca

Publikováno v: Chromatographia. 57:197-202

In this work the potential of porous graphitic carbon (PGC) as a new stationary phase in, capillary electrochromatography has been explored. Its behavior under the action of an applied potential is described for the separation of phenylureas. First,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0fced6b7de8a1852e26ee7bae9acd5d9
https://doi.org/10.1007/bf02491716

Control of electroosmotic flow in zirconia-coated capillaries

Autor: Jérôme Randon, M. Crosnier de Bellaistre, O Mathieu, J. L. Rocca

Publikováno v: Journal of Chromatography A. 971:199-205

The inner surface of a silica capillary has been modified using an anhydrous sol–gel method: zirconium propoxide reacted with silanol groups to give, after hydrolysis, a “zirconia-like” surface. The electroosmotic properties of zirconia-modifie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40ccceee4f44f566b769df9f4bb7f1c5
https://doi.org/10.1016/s0021-9673(02)01001-4