Planta med. 66, 403-407 (2000). Preparative TLC of machilusol A, B, C, D, E, and F on silica gel with n-hexane - acetone 1:1, dichloromethane - acetone 10:1 and dichloromethane - ethyl acetate 10:1. Visualization by spraying with cerous sulfate solution, detection by heating.

J. Chromatogr. A 1077 (2), 188-194 (2005). HPTLC of (+)-catechin (C), (-)-epicatechin (EC), (-)-gallocatechin (GC), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECg), (-)-epigallocatechin gallate (EGCg), procyanidin B1, and procyanidin B2 on cellulose prewashed with water (not necessary, when water was used as developing solvent) and dried with a hair dryer, with 1) water; 2) 1-propanol - water 1:4; 3) 1-propanol - water - acetic acid 4:2:1; 4) 1-propanol - water - acetic acid 2:8:1 in horizontal developing chamber (sandwich configuration). Detection with vanillin - H3PO4 reagent. Water enabled the separation of epimers C from EC and GC from EGC, as well as the dimers procyanidin B1 and B2. Additionally C, EGC, B1 and B2 were separated from all the other compounds. The best separation of the five main catechins (EC, GC, EGC, ECg, EGCg) present in green tea extract was achieved using 1-propanol - water - acetic acid 2:8:1. The chromatograms of oak bark extract developed in solvents with higher water content (1-propanol - water 1:4 and 1-propanol - water - acetic acid 2:8:1) showed less bands than chromatograms developed in solvents with higher organic modifier content (e.g. 1-propanol - water - acetic acid 4:2:1). It was proved that such behavior was due to the presence of procyanidins beside the main component catechin.

62nd Indian Pharmaceutical Congress Abstract No. F-240 (2010). TLC of escitalopram oxalate on silica gel with n-butanol – acetic acid – water 3:1:1. Quantitative determination by absorbance measurement at 240 nm. The method was linear in the range of 100-600 ng/band.

J. Planar Chromatogr. 28, 256-261 (2015). HPTLC of picroside-I (1) and picroside-II (2) in Picrorhiza kurroa on silica gel with ethyl acetate - methanol - acetic acid 80:10:1. Detection by dipping into anisaldehyde - sulfuric acid, followed by heating at 120 °C for 5 min. Quantitative fluorescence measurement at UV 366 nm. The hRF values for (1) and (2) were 57 and 66, respectively. Linearity was in the range of 200-4000 ng/zone. LOD and LOQ were 16 and 47 ng/zone for (1) and 16-48 ng/zone for (2). The intermediate precision was below 11 % (n=3).

Planta Medica 83(03/04), 300-305 (2017). Preparative TLC on 1) RP-18 phase with methanol – water, in several proportions from 2:1 to 9:11 and on 2) silica gel with dichloromethane – ethyl acetate, from 5:1 to 10:3 was applied to purify eight phenylethylchromones from subfractions of a methanolic extract of Aquilaria filaria agarwood. Preparative TLC on silica gel with n-hexane – ethyl acetate 2:1 was also used to separate the products of one of these chromones (2-(2-hydroxy-2-phenylethyl)-4H-chromen-4-one) with the (S)- and (R)-MTPA-Cl (α-methoxy-α-trifluoromethyl-phenylacetyl-chloride) needed for the Mosher ester method for asymmetric carbon configuration, allowing, after NMR, the determination of the chromone as an uneven mixture of R- and S-enantiomers (4:1). The enantiomer separation was done after derivatisation into diastereoisomers (no chiral separation).

Phytochem. Anal. 29, 452-462 (2018). HPTLC of apigenin(1), luteolin (2), kaempferol (3), quercetin (4), kaempferol‐3‐O‐glucoside (5), quercetin‐3‐O‐glucoside (6), isorhamnetin‐3‐O‐neohesperidoside (7) and rutin (8) in the fruits and aerial parts of Foeniculum vulgare (fennel), Pimpinella anisum (anise), Carum carvi (caraway), Cuminum cyminum (cumin), Coriandrum sativum (coriander), Apium graveolens (celery), Petroselinum crispum (parsley), and Anethum graveolens (dill) on silica gel with ethyl acetate – methanol – water – acetic acid 3:1:1:1. Quantitative determination by absorbance measurement at 254 nm. Heat maps and hierarchical clustering were performed for image processing. The hRF values for (1) to (8) were 97, 90, 83, 73, 30, 17, 7 and 2, respectively. LOD and LOQ were 54 and 166 ng/zone for (1), 52 and 157 ng/zone for (2), 58 and 177 ng/zone for (3), 37 and 112 ng/zone for (4), 57 and 172 ng/zone for (5), 54 and 164 ng/zone for (6), 55 and 169 ng/zone for (7) and 58 and 178 ng/zone for (8), respectively. The intermediate precision was <2 % (n=6). Average recovery was 98.4 % for (1), 92.3 % for (2), 95.3 % for (3), 96.8 % for (4), 94.5 % for (5), 95.6 % for (6), 95.1 % for (7) and 97.3 % for (8).

J. Agric. Food Chem. 35, 509-511 (1987). TLC of 4 benzopyranone-derivatives on silica with benzene - acetone - ethyl acetate (27:1.5:1, 2x), examination under UV at 254 nm.

Phytochemistry 28, 3003-3007 (1989). TLC of isofraxidin and scopoletin on silica with ethyl acetate - chloroform 1:3 diethyl ether - chloroform 1:2 and methanol - chloroform 3:17.