J. Liq. Chromatogr. Relat. Technol. 40, 320-326 (2017). HPTLC of 31 substances of toxicological interest on RP-18 with 60 % acetonitrile in buffer pH 6.0, on silica gel with chloroform – methanol 9:1 and using pressurized planar electrochromatography (PPEC) on RP-18 with 60 % acetonitrile in buffer pH 2.2. The authors showed the application of the migration distance of the solutes, obtained by the PPEC technique, with a proposed equation allowed for increase of likely identification of substances in toxicological analysis.

J. Liquid Chrom. 10, 3595-3604 (1987). TLC of 19 drugs (2 anticholinergic, 4 sympathomimetic, 4 betablockers, 1 neuromuscular blocking, 4 antipsychotic and 4 opioid and opioid antagonist drugs) on silica with ethyl acetate - methanol - NH3 85:10:5 and on RP-18 with methanol - water - HCl 50:50:1. Detection under UV 360, 254 nm and by spraying with acidified iodoplatinate solution, 0.5% aqueous Fast Black K solution, then with 0.5M NaOH.

J. Planar Chromatogr. 6, 147-148 (1993). TLC of sulfonamides (i.a. sulfadimidine, sulfadoxine, sulfamethoxypyridazine, sulfadimerazine, sulfadimethoxine) on silica with chloroform - butanol 4:1. Detection after treatment with fluorescamine solution under UV 366 nm.

II. Catharanthine and vindoline. J. Liquid Chromatogr. 18, 849-858 (1995). TLC on silica with petrol ether - ethyl ether - acetone - ethanol 70:10:20:1. Quantification by densitometry at 280 nm for catharanthine and at 310 nm for vindoline.

J. Planar Chromatogr. 11, 145-148 (1998). HPTLC of codeine, caffeine, papaverine, methaaqualone, nicotine (as reference compounds), and LSD, MDA (3,4-methylen-dioxyamphetamine) on silica gel with methanol - aqueous NH3 200:3. Detection with Dragendorff's reagent for reference samples and with van Urk's reagent for LSD. Methanol - chloroform 1:9 was used as mobile phase for the reference samples and MDA. Detection by spraying with Dragendorff's reagent. The Rf values of the unknown drug are calculated graphically by plotting experimental Rf values against literature Rf values in the same solvent system. Simple and rapid TLC procedure.

Part III. J. Planar Chromatogr. 16, 458-460 (2003). HPTLC of heroin, morphine, codeine, thebaine, papaverine, narcotine, paracetamol, benzodiazepines, methaqualone, phenobarbitone, and procaine hydrochloride on silica gel with chloroform - ethanol 9:1 with chamber saturation. Visualization by spraying with freshly prepared 1% aqueous ferric chloride, then with 1% acidified ethanolic 2,2-dipyridyl solution and heating at 100°C for 10 min.

59th Indian Pharmaceutical congress F-220, 442, (2007). HPTLC of 6-gingerol in herbal extracts on silica gel with n-hexane - ethyl acetate - ammonia 14:5:1 in a chamber saturated for 45 min. Densitometric evaluation at 254nm. The hRf value of 6-gingerol was 52. The method was linear in the range of 100 - 1200 ng/zone.

J. Sep. Sci. 30, 2447-2451 (2007). HPTLC of free gallic (1) and ellagic (2) acids, arbutin (3), hydroquinone (4), and bergenin in the green, brown and black leaves of Bergenia crassifolia on silica gel with toluene – ethyl acetate – formic acid – methanol 15:15:4:1. Quantitative determination by absorbance measurement at 280 nm. Antiradical activity of each component was determined by postchromatographic 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) derivatization and densitometric scanning at 517 nm as negative peak. Linearity was between 40 and 140 ng/zone, 240 and 720 ng/zone, 150 and 980 ng/zone, and 90 and 230 ng/zone for (1), (2), (3), and (4), respectively. The limit of detection was 30, 200, 90, and 40 ng/zone for (1), (2), (3), and (4), respectively. All compounds of the extract excluding bergenin were capable of scavenging DPPH radicals.