Ion chromatography for monitoring [NTf2]− anion contaminants in pure and saline water
| Autor: | Liem Bui-Le, Jason P. Hallett, Coby J. Clarke |
|---|---|
| Přispěvatelé: | Engineering & Physical Science Research Council (EPSRC) |
| Rok vydání: | 2020 |
| Předmět: |
Technology
EXTRACTION MUTUAL SOLUBILITIES TETRAFLUOROBORATE General Chemical Engineering Ion chromatography Analytical chemistry 02 engineering and technology TRIFLUOROMETHANESULFONATE 010402 general chemistry 01 natural sciences Analytical Chemistry Ion chemistry.chemical_compound 0399 Other Chemical Sciences LIQUID CATIONS PERCHLORATE Microemulsion Spectroscopy DRINKING WATERS Detection limit Science & Technology Aqueous solution Chemistry Chemistry Analytical General Engineering 021001 nanoscience & nanotechnology Saline water PEAK DISTORTION 0104 chemical sciences Food Science & Technology Physical Sciences PAIR CHROMATOGRAPHY Ionic liquid Seawater 0210 nano-technology Life Sciences & Biomedicine MONOLITHIC COLUMN 0301 Analytical Chemistry |
| Zdroj: | Analytical Methods. 12:2244-2252 |
| ISSN: | 1759-9679 1759-9660 |
| DOI: | 10.1039/d0ay00337a |
| Popis: | Hydrophobic ionic liquids containing bis(trifluoromethanesulfonyl)imide, [NTf2]-, anions partially dissolve in aqueous phases. The potential ecotoxicity of [NTf2]- means wastewater streams must be closely monitored to avoid environmental release. A new ion chromatography method is presented, which improves on existing techniques and methods by significantly decreasing analysis time and improving chromatographic peak properties. Consequently, the limit of detection is lowered to 5 μM (1.4 ppm) and limit of quantification lowered to 30 μM (8.5 ppm). The method is reproducible and has a high precision for short and medium chain length ionic liquids (RSD = 0.95%); however, microemulsion effects increase measurement errors for long chain ionic liquids (RSD = 2.32%), albeit by a relatively small amount. Hence, the method is a highly accurate analytical method for highly polarizable [NTf2]- anions, and quantification in the presence of high salinity samples, such as seawater, is readily achieved. Importantly, this method is a significant improvement on existing techniques (chromatography, NMR, UV-Vis) for many reasons, making it ideal for environmental monitoring or process design of [NTf2]- ionic liquid-based applications. |
| Databáze: | OpenAIRE |
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