J. Sep. Sci. 40, 4482-4494 (2017). HPTLC fingerprint of Herba Leonuri on RP phase with ethyl acetate – formic acid – acetic acid – water 20:3:3:2. Detection by spraying with 10 % sulfuric acid in ethanol, followed by heating at 105 °C for 10 min. Also HPTLC on normal phase (NP) silica gel with ethyl acetate – formic acid – ethanol 3:2:3. Detection by spraying with bismuth potassium iodide with 1 % iron chloride – ethanol 5:1, followed by heating at 105 °C for 10 min. Qualitative identification under UV 254 nm for the NP system and 365 nm for the RP system. The hRF values of rutin, chlorogenic acid, hyperoside and isoquercitrin in the RP system were 27, 32, 43 and 47, respectively. The hRF values for trigonelline and stachydrine in the NP system were 23 and 25.

J. Liq. Chromatogr. Relat. Technol. 41, 83-86 (2018). TLC of gardenia blue in foods on RP-18 with 0.2 % trifluoroacetic acid – acetonitrile – ethanol 1:2:3 and on cellulose with acetone – 3-methyl-1-butanol – water 6:5:5. The hRf values of gardenia blue coloring were 35, 18 and 13 on RP-18 and 72, 56 and 48 on cellulose layer.

Phytochem. Anal. 30, 218-225 (2019). HPTLC of flavonoids in red wine, apple juice and rose flowers on silica gel with ethyl acetate – methanol – formic acid 90:10:1. Glycosylated flavonoids were identified by inorganic matrix‐assisted laser desorption ionisation time‐of‐flight mass spectrometry (MALDI‐TOF‐MS).

J. Chromatogr. A 1530, 197-203 (2017). Evaluation of the phenolic and stigmasterol content and comparison of the antioxidant and antidiabetic activities by HPTLC combined with DPPH* free radical method and α-amylase assay towards ethanol and ethyl acetate extracts of 10 marine macroalgae species (3 chlorophyta, 4 phaeophyta and 3 rhodophyta). HPTLC on silica gel with n-hexane – ethyl acetate – acetic acid 20:9:1 over 80 mm. Detection either by dipping into 0.4 % DPPH* solution followed by storing in the dark for 30 min before evaluation, or by dipping into anisaldehyde – sulfuric acid reagent or neutralized ferric chloride solution (prepared by adding dilute sodium hydroxide to freshly prepared 2 % ferric chloride in methanol until precipitation occurs, followed by filtering), both followed by heating at 100 °C for 10 min. Quantitative evaluation by absorbance measurement at 470 nm for detection of α-amylase inhibition and at 550 nm for stigmasterol. The results showed higher antioxidant activity in the ethyl acetate extracts than in ethanol extracts, and higher amounts of fucoxanthin, stigmasterol and α-amylase inhibitory activities in ethyl acetate extracts. The results proved the relation of higher α-amylase inhibition in ethyl acetate extracts due to the presence of triterpenes and sterols, and no contribution of fucoxanthin to it.

J. High Resol. Chromatogr. 7, 538-539 (1984). TLC of arachidonic acid metabolites on silica, impregnated with phenylmethylvinyl chlorosilane, using heptane - methyl formate - ether - acetic acid 65:25:10:2 for 8.5 cm, followed by 2nd run with hexane - methyl formate-ether - acetic acid 50:40:10:1 for 11 cm. Detection by spraying with 2 % molybdic acid in ethanol.

Acta Chimica 116, 173-187 (1984). TLC of amino acids on silica with e.g. a) butanol- acetic acid - ethyl acetate1:1:1, b) butanol- acetic acid - water 4:1:5, c) butanol-pyridine - acetic acid -water 15:10:3:12. Detection with ninhydrin, Ehrlich reagent, chlorine-o-toluidine.

Plenary lectures of the 32nd International Congress on Medicinal Plant Research, Antwerp, July 23.-28., 1984. Wissenschaftliche Verlagsgesellschaft, Stuttgart 1985. Review on recent progress in isolation techniques for natural products. TLC, HPTLC, PLC and centrifugal TLC of plant phenolics, alkaloids, essential oil constituents and saponins and related terpenoid glycosides. Numerous separation conditions and critical observations are reported.

Budapest Chromatography Symposium, June 13, 1985. Separation of serum neutral lipids and cholesterol ester on silica with toluene - CCl4 1:3 and toluene. Separation of phospholipids with chloroform - methanol - acetic acid - acetone - water 30:9:4:2.5:2.