Related Experiment Videos
Liquid chromatography-Fourier-transform infrared spectrometry
G W Somsen1, C Gooijer, U A Brinkman
1Department of Analytical Chemistry and Toxicology, University of Groningen, Netherlands.
Journal of Chromatography. A
|October 20, 1999
Summary
Coupling liquid chromatography (LC) with Fourier-transform infrared spectrometry (FT-IR) offers two main detection methods. Solvent-elimination interfaces provide superior sensitivity and spectral quality for identifying low-level compounds compared to flow-cell detection.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Chromatography
Background:
- The coupling of liquid chromatography (LC) and Fourier-transform infrared spectrometry (FT-IR) is crucial for detecting and identifying sample components.
- Two primary approaches exist: direct flow-cell detection and solvent-elimination interfaces.
Purpose of the Study:
- To provide an overview of flow-cell based IR detection in LC-FT-IR.
- To discuss and compare solvent-elimination interfaces, including state-of-the-art spraying systems.
- To summarize interfaces suitable for reversed-phase LC and discuss future perspectives.
Main Methods:
- Review of flow-cell LC-FT-IR techniques.
- Discussion of early and advanced solvent-elimination interfaces for LC-FT-IR.
- Focus on spraying-based interfaces for rapid eluent evaporation.
Main Results:
- Flow-cell LC-FT-IR offers specific and quantitative detection of major components but has poor detection limits.
- Solvent-elimination techniques significantly enhance sensitivity and spectral quality.
- Advanced interfaces, particularly spraying systems, represent the current state-of-the-art.
Conclusions:
- Solvent-elimination LC-FT-IR is essential for unambiguous identification of low-level constituents due to improved sensitivity and spectral data.
- Flow-cell LC-FT-IR remains useful for analyzing major components in mixtures.
- The field of LC-FT-IR continues to evolve with advanced interface technologies.