J. Planar Chromatogr. 24, 534-538 (2011). HPTLC of clarithromycin in plasma on silica gel (prewashed with methanol) with ethyl acetate - methanol - 15 % ammonium acetate (pH 10.6) 7:2:1 in a twin-trough chamber with saturation for 15 min. Detection by dipping into xanthydrol solution (10 % in methanol). Quantitative determination by densitometry in absorbance mode at 506 nm. The hRf was 62. The method was linear over the range of 0.1-3.0 µg/mL (r2 = 0.9974). The recovery (by standard addition) was over 85 %. The intra-day and inter-day precision (%RSD) of the assay was in the range of 0.8-4.6 %. The recovery was above 95 %.

J. Planar Chromatogr. 27, 47-51 (2014). HPTLC of clotrimazole in vaginal tablets on silica gel with toluene - acetone 3:2. Quantitative determination by absorbance measurement at 215 nm. The hRF value for clotrimazole was 27. Linearity was in the range of 1000-2400 ng/zone. The intermediate/interday/intra-day precisions were below 1.3 % (n=6). Recovery was between 99.1 and 100.1 %.

Malaria J. 15, 215 (2016). TLC of methanol extracted tablets and the standards sulfadoxine and pyrimethamine with the GPHF Minilab (procedure for sulfadoxine) on silica gel with ethyl acetate – methanol 3:1 for approximately 15 min. Detection under UV 254 nm, and by exposure to iodine vapor. Documentation with a commercial digital camera. For comparison to authentic paracetamol and co-trimoxazole samples, the GPHF Minilab solvent systems for paracetamol (acetone – toluene – acetic acid 20:20:1), pyrimethamine (ethyl acetate – methanol – acetone – conc. aqueous ammonia 24:12:4:1) and co-trimoxazole (ethyl acetate – methanol 3:1) were used. 28 market samples were collected and analyzed, 10 samples were further analyzed by HPLC according to the USP. One sample was falsified, the box contained a mixture of paracetamol tablets and co-trimoxazole tablets and none of the tablets contained any anti-malarial drugs.

J. Planar Chromatogr. 31, 87-91 (2018). HPTLC-direct bioautography of the ethanolic leaf extract of greater burdock (Arctium lappa L.) on silica gel with chloroform – methanol – water 36:4:1. Direct bioautography by dipping into a bacterial suspension of Bacillus subtilis F1276 and Pseudomonas maculicola, followed by incubation for 2 h and dipping into an aqueous solution of 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) vital dye. The main antibacterial compound was analyzed by HPLC-MS.

J. Chromatogr. 328, 432-435 (1985). TLC of anthracyclinones obtained from hydralized fermentation broths on silica impregnated with a 0.5 N oxalic acid solution with chloroform - acetone 7:3. Fluorimetric determination at 589/483 nm after scraping of the spots from the plate.

J.A.O.A.C. 70, 126-129 (1987). TLC of cyclosporin A on silica with 3 solvent systems: butanol - acetic acid - water 4:1:1, chloroform - acetic acid - methanol 85:10:5, ethyl acetate - hexane - acetone 2:1:1. Detection with iodine, spraying with 6N HCl, oven-drying at 110 °C for 30 min and spraying with 0.1 % ninhydrin in butanol.

Jap. Hygienic Chem. 32, 442-446 (1986) (Eisei Kagaku). TLC on silica with acetonitrile - water 7:1. Determination by fluorescence densitometry at 365 nm. Detection limit 0.2 µg/g.

Chinese J. Antibiotics 13, 376-377 (1988). TLC on silica with 10% ammonium acetate - 10% NH3 - acetone 9:1:10. Detection under UV 254 nm. Quantification by spectrometry at 269 nm after removal from plate and elution with citric buffer.