Phytochemistry 157, 92-102 (2019). HPTLC of monogalactosyldiacylglycerol (1) and digalactosyldiacylglycerol (2) in the leaves of basket willow (Salix viminalis L., Salicaceae, Malpighiales), cabbage (Brassica oleracea L., Brassicaceae, Brassicales), pea (Pisum sativum, Fabaceae, Fabales), roseroot (Rhodiola rosea L., Crassulaceae, Saxifragales), meadow buttercup (R. acris L., Ranunculales), garlic (Allium sativum L., Amaryllidaceae, Asparagales) and Ipomoea tricolor Cav. (Convolvulaceae, Solanales) on silica gel with acetone – benzene – water 91:30:8. Qualitative identification under UV light at 254 and 366 nm. The hRF values were 20-26 for (1) and 63-77 for (2).

Pharmacogn. Mag. 14, 437-443 (2018). HPTLC fingerprinting of 7 plant species from northeast Brazil (Anacardium occidentale, Annona muricata, Guazuma ulmifolia, Phyllanthus niruri, Psidium guajava, Punica granatum, and Spondias mombin) using caffeic acid (1), quercetin (2), gallic acid (3) and catechin (4) as chemical markers on silica gel with toluene – ethyl acetate – methanol – formic acid 85% 75:25:25:6. Detection of (1) and (2) by spraying with natural products reagent A + 5 % polyethylene glycol 400. Detection of (3) and (4) by spraying with ferric chloride and vanillin-HCl, respectively. Qualitative evaluation under UV light at 254 and 365 nm. The hRF values for (1), (2) and (4) in Anacardium occidentale were 30, 42 and 21, respectively. The hRF value for (4) in Annona muricata was 16. The hRF values for (1) and (4) in Guazuma ulmifolia were 44 and 20, respectivley. The hRF values for (1) and (4) in Psidium guajava were 3 and 18, respectively. The hRF value for (1) in Punica granatum was 33. The hRF values for (1) to (4) in Spondias mombin were 31, 43, 31 and 17, respectively.

J. Planar Chromatogr. 31, 383-388 (2018). HPTLC of cocaine hydrochloride (1) and levamisole hydrochloride (2) on silica gel with cyclohexane – toluene – diphenylamine 75:15:10. Quantitative determination by absorbance measurement at 230 nm. The hRF values for (1) and (2) were 24 and 48, respectively. Linearity was between 200 and 2400 ng/zone for (1) and 100 and 1200 ng/zone for (2). LOD and LOQ were 14 and 42 ng/zone for (1) and 6 and 19 ng/zone for (2), respectively. The intermediate precision was <2 % (n=6). Average recovery was 99.8 % for (1) and 99.9 % for (2).

J. Planar Chromatogr. 31, 461-468 (2018). HPTLC of dabigatran etexilate mesylate on silica gel with methanol ‒ ethyl acetate ‒ benzene 3:4:4. Quantitative determination by absorbance measurement at 225 nm. The hRF value for dabigatran etexilate mesylate was 82. Linearity was between 0.3 and 3 μg/zone. LOD and LOQ were 0.03 and 0.09 μg/zone. The intermediate precision was <2 % (n=3). Average recovery was 98.9 %.

Chromatography the State of the Art, Vol. I, Akademiai Kiado, Budapest 1985, 467-492. Considerations on where to use GC, TLC, HPLC. When TLC appears appropriate, suggested sequence: conventional silica using 6 solvent systems, then water resistant silica with 3 aq. solvent systems, then HPTLC material for optimization. Finally, optimized system adopted for OPTLC technique.

(Hungarian). (Stereostructure of condensed-skeleton cis- and trans-dihydro-1,3-thiazines and 1-thia-3-aza-spiro alkanes.) TLC on silica with butanol - ether - acetic acid 10:10:1.

Detection by UV 365 nm. Determination of the eluates by UV spectrometry at 265 nm for praziquantel and 320 nm for the impurities.

Synthesis of 3-O-methyl-L-xylose. Acta Chim. 124, 315-321 (1987). Elucidation of the structures of synthesized compounds by TLC (and 13C-NMR spectroscopy). TLC on silica with dichloromethane - methanol 95:5, dichloromethane - ethyl acetate 9:1, dichloromethane - acetone 9:1, dichloromethane - methanol 85:15. Detection by charring with 50% sulfuric acid or under UV.