J. Agric. Food Chem. 84, 456-458 (1986). Isolation of coumarin by TLC on silica with dichloromethane - methanol 99.5:0.5, petrol ether - ether - ethyl acetate 90:5:5 and petrol ether - ethyl acetate 8:2. Detection by UV 365 nm and identification by cochromatography.

J. Planar Chromatogr. 4, 115-122 (1991). Description and applicability of a novel version of forced flow planar chromatography, long distance (OPLC). The special arrangement of plates promotes high separation efficiency resulting in high resolution (700,000 - 80,000 theoretical plates). It has been demonstrated that long distance OPLC may be applied successfully for the separation of complex extracts from biological matrices.

Chromatographia 38, 520 (1994). TLC of anthraquinone aglycones on silica, using a improved solvent system, hexane - acetone - tert. butanol 85:10:5, for both analytical and preparative applications.

J. Planar Chromatogr. 20, 53-56 (2007). HPTLC of flavonoids (quercetin glucuronide, hyperoside, isoquercitrin, quercetin galloyl galactoside, quercitrin) on silica gel with ethyl acetate - formic acid - water 136:5:6 in a horizontal chamber. Densitometric quantitfication of flavonoids at 350 nm.

International Journal of PharmTech Research 2(2), 1427-1430 (2010). Ashokarista formulations contain ashoka (Saraca indica) as the main ingredient. Its markers are catechin, (+)catechole, and (-)epicatechin. TLC of extracts and (+)catechin on silica gel with toluene - ethyl acetate - formic acid - methanol 15:15:4:0.1. Quantitative determination by densitometry in absorbance mode at 278 nm. For identification of the stem-bark of Saraca indica the fingerprint is evaluated after detection with anisaldehyde-sulphuric acid. The hRf value of (+)catechin was 54.

J. Planar Chromatogr. 27, 444-448 (2014). HPTLC of quercetin in fresh tubers of Satyrium nepalense on silica gel with toluene – ethyl acetate – formic acid 7:5:1. Quantitative determination by absorbance measurement at 366 nm. The hRF value of quercetin was 54. Linearity was in the range of 2-12 μg/zone. The intermediate intra-day and inter-day precisions were below 1 % (n=3) for quercetin. The LOD and LOQ was 40 and 120 ng/zone, respectively. Mean recovery for quercetin was 99.8 %.

J. AOAC Int. 98, 857-861 (2015). _x000D_TLC direct bioautography of apigenin (1) and α-linolenic acid (2) in Matricaria recutita L. (chamomile) and Achillea millefolium L. (yarrow) tinctures on silica gel with chloroform - acetone 99:1. Bioautography by dipping into suspensions of Bacillus subtilis, S. aureus, S. epidermidis, Pseudomonas syringae pv. maculicola, Xanthomonas campestris pv., Escherichia coli and Aliivibrio fischeri for 10 s. In the case of soil bacteria and human pathogens, the plates were incubated at 37 °C for 5 h, followed by dipping into a solution of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT; 0.05 g/90 mL) for 5 s and further incubation at 37 °C for 2 h. The hRF values for (1) and (2) were 33 and 66, respectively.

J. Chromatogr. Sci. 54 (1), 64-69 (2016). Micro-TLC of 11 species of the Mentha genus and two finished pharmaceutical products in two-dimensional mode in normal (NP) and reversed-phase (RP) systems on cyano phase with non-aqueous eluents for NP-TLC and with mixtures of acetonitrile with water or methanol with water for RP-TLC. Optimization of one-dimensional systems was performed by determining RM values vs. composition of mobile phase dependencies for standards occurring in various Mentha sp. On the basis of these dependencies the most selective chromatographic systems for each run were chosen. Then most selective eluents were applied to optimize two-dimensional systems by creating Rf in NP systems vs. Rf in RP systems correlations. The best two-dimensional systems were chosen on the basis of R(2) values for Rf vs. Rf correlations (the lowest values of R(2) coefficients). Two-dimensional micro-TLC was used to separate phenolic compounds of the examined plant materials.