J. Chromatogr. A. 1588, 137-149 (2019). HPTLC of sugars (1), amino acids (2), gluconic acid (3) and glycerol (4) in 20 wine samples on silica gel with i-propanol - n-butanol - boric acid solution (200 mg/10 mL) - acetic acid 14:6:3:1 for (1), 2-butanol - ammonia solution (25 %) - pyridine - water 19:5:17:13 for (2), methanol - water 7:3 for (3) and acetonitrile - boric acid solution (200 mg/10 mL) 4:1 for (4). Detection of (3) by heating at 190 °C for 20 min, followed by densitometric evaluation at 366 nm. Further detection by dipping into: 1) diphenylamine-aniline-phosphoric acid reagent, followed by heating at 120 °C for 10 min; 2) vanillin-sulfuric acid reagent, followed by heating at 135 °C for 20 min; 3) ninhydrin reagent, followed by heating at 110 °C for 5 min; 4) bromophenol blue, followed by heating at 110 °C for 10 min. Derivatized plates were documented in white light and under UV light at 366 nm. Quantification of (4) was performed using a deuterium/tungsten lamp at 380 nm. Micro planar chromatography was performed using a device, where the HPTLC foil was covered by a thick glass plate with a hole in the center, through which the mobile phase was supplied. Further analysis by mass spectrometry. 

J. Liq. Chromatogr. Relat. Technol. 43, 361-366 (2020). HPTLC of the dried root and rhizome of Rhodiola rosea on silica gel with ethyl acetate - methanol - water 77:13:10. Detection by spraying with 1) a solution of p-anisaldehyde (0.5 mL in 85 mL methanol, 10 mL acetic acid and 5 mL sulfuric acid), followed by heating at 105 ºC for 5-7 min, 2) a solution of 2-isopropyl-5-methylphenol (0.5 g in 95 mL ethanol and 5 mL sulfuric acid), followed by heating at 120 ºC and 3) NP solution (1 g diphenylboryloxyethylamine in 100 mL methanol) and PEG solution (5 g PEG-4000 in 100 mL ethanol). Detection under UV 254 and 366 nm. Effect directed detection was performed using 1) DPPH* radical reagent assay: spraying with 0.2 % 2,2-diphenyl-1-picrylhydrazyl solution in methanol, 2) AChE assay: spraying with the enzyme solution (20 units of AChE and 150 mg BSA in 150 mL 0.05 M TRIS buffer, pH 7.8), follwed by incubation at 37 ºC for 20 min and spraying with 50 mg Fast Blue B salt diluted in 100 mL of water and 3) Bacillus subtilis bioassay: dipping into bacterial suspension for 8 s, followed by incubation at 37 ºC for 17 h and spraying with 0.2 % MTT aqueous solution. The bioautographic tests showed presence of both antioxidants (DPPH assay) and antibacterials (Bacillus subtilis assay) in the methanolic plant extract, however no acetylcholinesterase inhibitors were found. As marker compound, rosavin was detected.

J. Planar Chromatogr. 23, 198-200 (2010). Proposition of new methods for calculation of the partition coefficients of aliphatic compounds from experimental Rf values and the numerical values of selected topological indexes. The experimental partition coefficient (log Pexp) of cetyl alcohol was determined for the n-octanol-water system. Numerical values obtained were compared with theoretical values from a database (AlogPs, AC_logP, AB/LogP, ALOGP, milogP, and XLOGP2). HPTLC of cetyl alcohol, stearyl alcohol, palmitic acid, stearic acid, alpha-hydroxypalmitic acid, and 12-hydroxystearic acid on RP18 with methanol and with methanol - water 19:1 in a horizontal chamber at room temperature. Detection after visualization in iodine vapor.

J. Chromatogr. A 1560, 97-103 (2018). Proposal of a simple and convenient on-spot derivatization approach for the modification of hydroxyl-containing compounds for their analysis by TLC/MALDI. Post-chromatographic acylation of separated analytes with 3-bromopropionyl chloride with simultaneous quaternization of pyridine, resulted in derivatives with permanent positive charges, which, in contrast to the initial alcohols not ionizable under TLC/MALDI conditions, reveal intense peaks of their cationic moieties in MALDI mass spectra recorded directly from TLC plates. Demonstration of the method by applying to a series of mammalian and plant sterols, phenols and terpene alcohols.

J. Chromatogr. 538, 373-383 (1991). Preparative TLC of diacylglycerols (DAGS) on silica - boric acid 19:1 with chloroform - acetone 98:2. Detection under UV 254 nm. Elution of DAG isomers with chloroform - methanol - trimethyl borate 20:10:1. Analytical TLC of 11 DAGS on silver impregnated silica with silver nitrate - saturated mixture of chloroform - isopropanol 99:1. Identification of the correlation between mobility and polarity of DAG species.

Ind. J. Pharma. Sci. 72(1), 86-91 (2010). Three species of Plumbago (Plumbaginaceae), i.e. P. zeylanica, P. carpensis, and P. rosea were studied for different physico-chemical parameters in addition to the estimation of microbial contamination, aflatoxins and pesticide residues and heavy metal content. All three species are used as herbs. The fingerprint profile of each species was compared using plumbagin as marker. Chloroform extracts of each plant were subjected to chromatography on silica gel with toluene - ethyl acetate 4:1 in a saturated twin trough chamber. Detection under UV 254 nm and 366 nm. The hRf value of plumbagin was 70. The identity of plumbagin in the samples was shown by overlay of the UV spectra. Linearity was between 200 and 1000 ng/zone. The amount of plumbagin in the three species was between 0.01 and 0.17 %.

Planta Med. 83, 1011-1019 (2017). The subfractionation on silica gel column of a diethyl ether fraction of a hydromethanolic extract of Lamium album aerial parts was controlled by TLC on silica gel with ethyl acetate – formic acid – water 20:2:3. Detection was performed at UV light after derivatization with 1 % Natural Product Reagent A. From the last subfraction, caffeic acid and tiliroside were isolated. The same TLC monitoring was applied for the fractionation of the butanol fraction of the extract. Some fractions and their subfractions were purified on dextran gel (Sephadex LH-20), and monitored by TLC on silica gel with ethyl acetate – formic acid – acetic acid – water 100:11:11:26, with the same detection. These subfractions contained caryoptoside and other iridoids, glucomartynoside, lamiusides and other phenylpropanoid derivatives.

J. Chin. Trad. Med. (Zhongguo Zhongyao Zazhi) 16, 101-102 (1991). TLC of magnolol on silica with benzene – methanol 9:1. Detection under UV. Quantification by fluorometry at excitation 303 nm after elution with ethanol.