Abstract
Continuous wave diode laser is applied for desorption of an analyte from a porous surface of a thin-layer plate covered with a graphite suspension. The thermally desorbed analyte molecules are ionized in the gas phase by a corona discharge at atmospheric pressure. Therefore, both essential processes – the desorption and the ionization of analyte molecules, which are often performed in one step – are separated. Reserpine was chosen as model analyte, which is often used for specification of mass spectrometers. No fragmentation was observed because of efficient collisional cooling under atmospheric pressure. The influence of diode laser power and the composition of the graphite suspension were investigated, and a primary optimization was performed. An interface to allow online qualitative and quantitative full plate detection and analysis of compounds separated by thin-layer chromatography is presented.
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Peng, S., Ahlmann, N., Edler, M., Franzke, J. (2011). Scanning Diode Laser Desorption Thin-Layer Chromatography Coupled with Atmospheric Pressure Chemical Ionization Mass Spectrometry. In: Srivastava, M. (eds) High-Performance Thin-Layer Chromatography (HPTLC). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14025-9_17
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DOI: https://doi.org/10.1007/978-3-642-14025-9_17
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