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Electrolyte system strategies for anionic isotachophoresis with electrospray-ionization mass-spectrometric detection. 1. Regular isotachophoresis and free-acid isotachophoresis
Z. Malá, P. Gebauer, P. Boček,
Language English Country Germany
Document type Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Anions chemistry MeSH
- Anti-Inflammatory Agents, Non-Steroidal analysis MeSH
- Diclofenac analysis MeSH
- Electrophoresis, Capillary MeSH
- Electrolytes chemistry MeSH
- Spectrometry, Mass, Electrospray Ionization methods MeSH
- Ibuprofen analysis MeSH
- Isotachophoresis methods MeSH
- Acids chemistry MeSH
- Limit of Detection MeSH
- Analgesics, Non-Narcotic analysis MeSH
- Drinking Water analysis MeSH
- Rivers chemistry MeSH
- Publication type
- Journal Article MeSH
- Evaluation Study MeSH
- Research Support, Non-U.S. Gov't MeSH
The subject of this work is the definition of a simple model based on general ITP theory that allows describing and predicting the behavior of ITP systems compatible with ESI-MS detection. The model is exemplified by anionic ITP of weak acids that represent an interesting potential application field of ITP-ESI-MS. Suitable ESI-compatible electrolyte systems of very simple composition are proposed including a special free-acid ITP arrangement. The properties of these systems are discussed using illustrative diagrams of their stacking windows. The use of anionic ITP-ESI-MS in negative-ion ESI mode is reported for the first time and its suitability for sensitive trace analysis is demonstrated. The presented ITP-ESI-MS application example comprises a free-acid ITP system formed of formic and propionic acids and direct injection analysis of ibuprofen and diclofenac in waters with quantitation limits of the order 10(-10) M.
References provided by Crossref.org
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