J. Planar Chromatogr. 31, 383-388 (2018). HPTLC of cocaine hydrochloride (1) and levamisole hydrochloride (2) on silica gel with cyclohexane – toluene – diphenylamine 75:15:10. Quantitative determination by absorbance measurement at 230 nm. The hRF values for (1) and (2) were 24 and 48, respectively. Linearity was between 200 and 2400 ng/zone for (1) and 100 and 1200 ng/zone for (2). LOD and LOQ were 14 and 42 ng/zone for (1) and 6 and 19 ng/zone for (2), respectively. The intermediate precision was <2 % (n=6). Average recovery was 99.8 % for (1) and 99.9 % for (2).

J. of Medicinal Chemistry 32, 119-127 (1989). TLC on silica with dichloromethane - ethyl acetate 85:15 and dichloromethane - methanol 7:1. Detection under UV 366 nm.

J. Planar Chromatogr. 4, 467-470 (1991). TLC of 15 heterocyclic bases and their derivatives on silica with eluents of different composition consisting of a non-polar diluent (benzene) and polar solvent (e.g. acetone, diethylamine and ethanol). Visualization with Dragendorff’s reagent.

Anal. Letters 28, 59-70 (1995). Test of IR- and 'H-NMR-spectra of 6 new 2-(alkoxy- and alkoxy-hydroxy-styryl)quinolines with antibacterial activity. TLC of 2-styrylquinolines on silica with 1) benzene - ethyl acetate 8:2, 2) benzene - acetone 9:1, 3) benzene - methanol 19:1. Detection by spraying with Dragendorff’s reagent. Investigation of the relation between the quantity and spot area for quantification using a computer correlation analysis.

J. Liq. Chrom. Rel. Technol. 27, 425-435 (2004). TLC of 9 heterocyclic azophenols (e. g. azo derivatives of 2-amino-1,3,4-oxadiazole and 1,2,4-triazole) on RP-2 in flat sandwich chambers with a mixture of phosphate buffer solution + water (or aqueous solution of ion-pairing reagent dimethyllaurylbenzylammonium bromide, Sterinol) + methanol + acetonitrile, e. g. phosphate buffer - water - methanol - acetonitrile 4:4:12:5. Dimethyllaurylbenzylammonium bromide may be used as a counterion for chromatography of ionizable, but coloured, substances.

J. Agric. Food Chem. 56, 8050-8057 (2008). HPTLC of [2-14C]-cymoxanil in the cultures (medium and mycelium) and in the cell-free extracts of Botrytis cinerea on silica gel with hexane - ethyl acetate - acetic acid 70:30:1. The most polar products were separated on RP-18 (impregnated with a methanolic solution of tetrabutylammonium bromide 70 mM and dried at 80 °C for 5 min) with phosphate buffer (0.01 M, pH 6) – methanol 11:9. Detection by autoradiography. The hRf value of cymoxanil was 35 on silica gel. Different metabolites were detected using both stationary phases.

62nd Indian Pharmaceutical Congress Abstract No. F-266 (2010). TLC of metformin and pioglitazone, extracted with methanol from bulk and pharmaceutical formulation, on prewashed silica gel with toluene – methanol – triethylamine 40:10:1. The hRf values of metformin and pioglitazone were 25 and 50, respectively. Quantitative determination by absorbance measurement at 230 nm. The linearity was in the range of 100-1000 ng/band for metformin and 200-1200 ng/band for pioglitazone: the correlation coefficients (r) were 0.9958 and 0.9992, respectively.

J. Ethnopharmacol. 148, 869-879 (2013). HPTLC of cantharidin in the blister beetles Epicauta hirticornis and Mylabris cichorii on silica gel with ethyl acetate - chloroform. Identification by absorbance measurement at 254 nm. The hRf of cantharidin was 78 and structurally defined as hexahydro-3a,7a-dimethyl-4,7-epoxyisobenzofuran-1,3-dione.