J. Planar Chromatogr. 19, 195-199 (2006). HPTLC of scopoletin on silica gel with toluene - diethyl ether 1:1, saturated with 10 % glacial acetic acid, in a twin-trough chamber saturated with mobile phase for 45 min. Evaluation by densitometry at 366 nm. The method was validated for linearity, accuracy, interday and intraday precision, specificity, repeatability of measurement of peak area, and repeatability of sample application. Limit of detection was 50 ng/spot.

J. Chromatogr. A 1468, 228-235 (2016). Development and validation of a rapid and simple screening method by HPTLC for antioxidant activity in samples of 16 algal species collected from local Victorian beaches. Quantification of fucoxanthin, one of the most abundant marine carotenoids directly from the HPTLC plates before derivatization either with 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical or ferric trichloride to analyze antioxidants in marine algae, based on their ability to chelate iron ions or to scavenge non-biological stable free radical, respectively. Classification of algae species into 5 groups according to the chemical/antioxidant profiles by principal component analysis of obtained HPTLC fingerprints. The investigated brown algae samples were rich in non-polar and moderate-polar and phenolic compounds with antioxidant activity, while most of the phenolic iron chelators showed free radical scavenging activity. Strong positive and significant correlations between total phenolic content and DPPH radical scavenging activity showed that phenolic compounds, including flavonoids are the main contributors of antioxidant activity in these species, which could be considered for future applications in medicine, dietary supplements, cosmetics or food industries. Discussion of the advantages of the proposed methods in terms of screening for antioxidants and quantification of antioxidant constituents in complex mixtures using the flexible and versatile standard HPTLC system in the drug discovery, and the possibility of using the method for the bioassay-guided isolation of unknown natural antioxidants and subsequent identification if combined with spectroscopic identification.

(Analysis and standardization of medicinal drugs and phytopreparations by HPLC and other chromatographic methods.) Dtsch. Apotheker-Zgt. 123, 515-521 (1983). TLC of flavonoids on silica with ethyl acetate - MEK - formic acid- acetic acid - water 50:30:7:3:10. Detection by UV 365 nm and modified natural product reagent ("Naturstoffreagenz").

Chromatographia 20, 732-734 (1985). Description of a new two-dimensional TLC technique using silica as adsorbent. Detection and identification of isomeric pairs of chalcones and flavanones.

J. Chromatogr. 553, 477-487 (1991). Description of a computer program which enables scanning and evaluation with a TLC scanner. Use of the method in quantitative determination of some phenolic components in propolis, and identification and quantification of some typical flavonoids.

Eine afrikanische Heilpflanze gegen Onchozerkose. (Cassia fikifiki. An African drug against onchocercosis.) Deutsche Apotheker Zeitung 135, 283-304 (1995). TLC of antranoids and flavonoids on silica with 1-propanol - ethyl acetate - water 4:4:3. Detection under 366 nm.

J. Planar Chromatogr. 20, 429-435 (2007). HPTLC of 3 phenolic acids (caffeic acid, p-coumaric acid, isoferulic acid) and 4 flavonoids (pinocembrin, pinocembrin-7-methyl ether, chrysin, tectochrysin) on silica gel with chloroform - methanol - formic acid 88:7:5 with chamber saturation. Detection by spraying with 1 % ethanolic aluminium chloride solution. Quantification by scanning densitometry in absorbance mode.

J. Planar Chromatogr. 25, 314-319 (2012). HPTLC of 4-odemethylpodophyllotoxin (1), podophyllotoxin (2), kaempferol (3), podophyllotoxone (4), and deoxypodophyllotoxin (5) in the rhizomes of Podophyllum hexandrum on silica gel with toluene - ethyl acetate 2:1 + 1 drop glacial acetic acid. Quantitative determination by absorbance measurement at 254 nm. Linearity was in the range of 1-8 µg/band for (1), (2) and (4) and 2-10 µg/band for (3) and (5). The intermediate/inter-day/intra-day precision was below 2 %. Average recovery for all (1) to (4) were between 96.4 and 101.8 %.