High-performance thin-layer chromatography method for assessment of the quality of combinatorial libraries, and comparison with liquid chromatography-ultraviolet-mass spectrometry.
A high-performance thin-layer chromatography (HPTLC) method was developed for fast evaluation of the purity of solid-phase synthesis products. The results obtained were in good agreement with results obtained by the LC-MS method (r(2) = 0.8404) or by the LC-UV method (r(2) = 0.8053), confirming the suitability of HPTLC for purity analysis of combinatorial syntheses. The synthesis products can be quantified and identified by measuring UV densitograms or in situ UV spectra or by ESI-MS after isolation of the zone of interest. A new, simple, and fast method for transferring the zone of the analyte from the plate to the ESI-MS equipment is described. The new HPTLC method enables rapid and efficient analysis of approximately 40 samples in parallel. As such, it offers a cheaper and easier way to analyze the purity of synthesis products than the commonly used LC-UV-MS.
Salo
Piia K
PK
Department of Pharmacy, Division of Pharmaceutical Chemistry, and Viikki Drug Discovery Technology Center, Department of Pharmacy, P.O. Box 56, FIN-00014 University of Helsinki, Finland.
Pertovaara
Anniina M
AM
Salo
Vesa-Markku A
VM
Salomies
Hannele E M
HE
Kostiainen
Risto K
RK
D002853:Chromatography, Liquid; D002855:Chromatography, Thin Layer / Q000379:methods*; D020650:Combinatorial Chemistry Techniques; D013058:Mass Spectrometry; D014466:Ultraviolet Rays