Use of 1-alkyl-3-methylimidazolium-based ionic liquids as background electrolytes in capillary electrophoresis for the analysis of inorganic anions

Autor:	Hongbing Mo, Linying Zhu, Weijian Xu
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Tetrafluoroborate Thiocyanate Chemistry Capillary action Inorganic chemistry Analytical chemistry Filtration and Separation Electrolyte Analytical Chemistry Electrophoresis chemistry.chemical_compound Capillary electrophoresis Ionic liquid Alkyl
Zdroj:	Journal of separation science. 31(13)
ISSN:	1615-9314
Popis:	Separation of inorganic anions in CE is often a challenging task because the electrophoretic mobilities of inorganic anions are comparable to or even greater than the EOF mobility. In this study, we present the use of ionic liquids (ILs) as background electrolytes (BGEs) in CE of inorganic anions. The 1-alkyl-3-methylimidazolium-based ILs as BGEs dynamically coated the capillary wall and induced a reversed EOF. This allowed the anions to comigrate with the EOF and yielded a rapid separation. Increasing the alkyl chain length of the ILs and BGE concentration can significantly improve the separation resolution. With 40 mM 1-butyl-3-methylimidazolium tetrafluoroborate as BGE, good separations of five model anions (Br-, I-, NO2(-), NO3(-), and SCN-) were achieved in a range of buffer pH values. The separation efficiency was as high as 34 600-155 000, and the RSDs of the migration times were less than 0.8% (n = 5).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5128b5f577afcba23a74b2337f00f69a https://pubmed.ncbi.nlm.nih.gov/18646276 Zobrazit plný text záznamu Plný text