The analysis of ionic liquids can be performed by capillary electrophoresis using different separation modes with both direct and indirect UV detection. The main components, impurities or additives used for special application solutions can be quantified.
Impurity control of the ionic liquid “1-Ethyl-3-methylimidazolium tetrachloroaluminate” (EMIM AlCl4)
- Separation: CZE
- Electrolyte: CE-Kd01
- Capillary: fused silica, 50 µm ID (bubble cell), 64 cm in total
- Injection: 10 s, 50 mbar
- Detection: direct UV, 200 nm
- Description: Determination of the major cationic component 1-Ethyl-3-methylimidazolium (EMIM) and the relevant impurities Imidazole (IM), 1-Methylimidazole (1-MIM), 4-Methylimidazole (4-MIM) and Ethylimidazole (EIM) in the IOLI sample using an acidic separation buffer and direct UV-detection.
Download: EMIM AlCl4-Impurities
Additive Nicotinamide in the ionic liqid “1-Ethyl-3-methylimidazolium tetrachloroaluminate” (EMIM AlCl4)
- Separation: CZE
- Electrolyte: CE-Kd01
- Capillary: fused silica, 50 µm ID (bubble cell), 64 cm in total
- Injection: 10 s, 50 mbar
- Detection: direct UV, 200 nm
- Description: When using EMIM AlCl4 as an electrolyte solution for the deposition of aluminum, nicotinamide can be used as an additive to improve the coating properties. Nicotinamide can be determined in the ionic liquid using an acidic electrolyte system and direct UV-detection.
Download: EMIM AlCl4-Nicotinamide