Artículo
Performance of Dicarboxylates for the Separation of Arsenic Species by Anion Exchange Chromatography
Fecha de publicación:
02/2023
Editorial:
Vieweg
Revista:
Chromatographia
ISSN:
0009-5893
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This work presents a study of the chromatographic performance of several dicarboxylates as eluents in anion exchange chromatography for the separation of four As species. Retention factors, asymmetry factors and plate numbers were determined for arsenite, arsenate, dimethyl arsenate, and monomethyl arsonate. The eluents studied included the series of linear dicarboxylates from oxalate to adipate, three hydroxy-substituted dicarboxylates, and an aromatic dicarboxylate. The linear dicarboxylates showed a marked influence of the length of the aliphatic chain on the separation performance. The higher hydrophobicity of the longer chains increases their affinity to the stationary phase due to interactions with the polymeric support, resulting in shorter retention times, except for oxalate which has a high charge density and deviates from this trend. This hydrophobicity also affects the efficiency and asymmetry obtained for the different species. The hydroxy-substituted dicarboxylates showed a complex behavior and different interactions with the As species than their unsubstituted counterparts. On the other hand, the aromatic ring and high charge density of the phthalate ion resulted in very short retention times and high asymmetries for the inorganic species. In terms of overall performance, oxalate and malonate seem to be the most suitable choice for the separation of anionic arsenic species.
Palabras clave:
ANION EXCHANGE
,
ARSENIC
,
DICARBOXYLATES
,
DICARBOXYLIC ACIDS
,
SPECIATION
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos(ICIVET-LITORAL)
Articulos de INST. DE CIENCIAS VETERINARIAS DEL LITORAL
Articulos de INST. DE CIENCIAS VETERINARIAS DEL LITORAL
Citación
Schlotthauer, Jonatan; Simonetto, Candela; Brusa, Lucila; Sigrist, Mirna Edit; Performance of Dicarboxylates for the Separation of Arsenic Species by Anion Exchange Chromatography; Vieweg; Chromatographia; 86; 3; 2-2023; 201-211
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