Photoacoustic Investigations of Secondary Chromatographic Effects on TLC Plates

Photoacoustic Investigations of Secondary Chromatographic Effects on TLC Plates

Photoacoustic spectroscopy (PAS) was used to study the vertical concentration distribution of compounds on TLC plates. The results suggest that under the given experimental conditions compounds exhibit irregular concentration profiles in vertical direction and tend to concentrate in the uppermost 61...

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Veröffentlicht in:Analytical Sciences 1997, Vol.13(Supplement), pp.191-194
Hauptverfasser: Vovk, I, Franko, M, Gibkes, J, Prosek, M, Bicanic, D
Format: Artikel
Sprache:eng
Schlagworte:
Agricultural Engineering and Physics
Agrotechniek en -fysica
Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
densitometry
depth profiling
Exact sciences and technology
Other chromatographic methods
Photoacoustic spectroscopy
thermal diffusivity
TLC
VLAG
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Beschreibung
Zusammenfassung:Photoacoustic spectroscopy (PAS) was used to study the vertical concentration distribution of compounds on TLC plates. The results suggest that under the given experimental conditions compounds exhibit irregular concentration profiles in vertical direction and tend to concentrate in the uppermost 61μm thick layer. This irregularity was accounted for by photoacoustic probing of thicker sorbent layers what lead to an improved linearity of calibration curves compared to those obtained by reflectance densitometry.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.13.supplement_191