J. Planar Chromatogr. 6, 415-418 (1993). TLC of 4 drug mixtures (hydroxyethyltheophylline/sulfadimidine, hydroflumethiazide/theophylline, carprofen/flunixin, frusemide/caffeine) and 11 corticosteroids on silica with 5 different mobile phases (ethyl acetate - methanol 0.880 NH3 80:25:10; dichloromethane - dioxan - water 100:50:50; lower layer; chloroform - methanol 95:5; toluene - ether - acetic acid - water 120:60:18:1. Detection and/or quantification by densitometry (no details).

J. Planar Chromatogr. 8, 388 - 392 (1995). HPTLC of MDA.HCl, MDMA.HCl, MDE.HCl, BDB.HCl, MBDB.HCl, LSD, and atropine on silica with dichloromethane - methanol 200:3 in the presence of NH3 in a separate 10 mL glass vessel for LSD, ethyl acetate - acetone - methanol - 25% NH3 50:50:20:1 for MBDB, acetone - ethanol - 25% NH3 90:7:3 for atropine. Identification by in situ FTIR measurement.

J. Chinese Trad. and Herb. Drugs (Zhongcaoyao), 36 (2), 222-224 (2005). TLC on silica gel with chloroform - methanol - water 70:35:4. Detection by spraying with 10 % H2SO4 in ethanol and heating at 105 °C for 5 min. Identification by fingerprint technique. Quantification by densitometry at 530 nm. Validation of the method by investigation of linearity (0.458 µg - 2.748 µg, r = 0.998); precision (RSD = 2.48 %, n = 5 within plate and RSD = 4.69 % plate to plate); reproducibility of five time assay towards the same sample (RSD = 2.41 %); and standard addition recovery (96.11 %, RSD = 1.91 %, n = 5). The results for real life samples are given.

Chromatographia 67 (5-6), 441-447 (2008). HPTLC of forskolinon on silica gel aluminium foil with benzene - methanol 9:1. Quantitative determination by densitometry in the absorbance mode at 545 nm after spraying with anisaldehyde sulphuric acid reagent. The method was validated: linearity was between 100 and 1000 ng/spot (r = 0.994) and the limits of detection and quantification were 8 and 27 ng/spot respectively. Application of the proposed method for determination of forskolin in Coleus forskohlii root and in capsule dosage forms, which showed 0.18 and 0.57 % w/w of forskolin, which was subjected to acid and alkali hydrolysis, oxidation, photodegradation and heat degradation. The method shows good repeatability, selectivity and accuracy, and effectively separates forskolin from components of C. forskohlii root, from excipients of capsule as well as the degradation products of forskolin. It can be used for routine analysis and as a stability-indicating method.

Chinese J. Hosp. Pharm. (Zhongguo Yiyuan yaoxue Zazhi) 25 (1), 90-92 (2005). TLC on silica gel with chloroform - ethyl acetate - formic acid 2:2:1. Detection under UV light. Identification by fingerprint technique. Quantification by densitometry at 325 nm. Validation of the method by investigation of linearity (0.52 µg - 4.68 µg, r = 0.9992); precision (RSD = 2.20 %, n = 5); reproducibility of five time assay towards the same sample (RSD = 3.10 %); standard addition recovery (99.0 %, RSD = 0.26 %, n = 5). The results for three real life samples are given.

J. Pharm. Biomed. Anal. 43 (2), 722-726 (2007). HPTLC of imatinib mesylate both as a bulk drug and in formulations on silica gel aluminium plates with chloroform - methanol 3:2. Quantitative determination by absorbance measurement at 276 nm. Linearity was between 100 and 1000 ng per spot. The limit of detection and quantitation was 10 and 30 ng, respectively. The method is repeatable, selective and accurate and can be used for stability control.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 27 (2), 225-227 (2004). TLC on silica gel with 1) petroleum ether (30 - 60 ºC) - ethyl acetate 9:1; 2) benzene - glacial acetic acid 4:1. Detection 1) by spraying with 1 % vanillin solution and heating at 105 ºC for 10 min; 2) under UV 365 nm. Identification by fingerprint technique. Quantification of ferulic acid by densitometry at 325 nm. Validation of the method by investigation of linearity (0.16 µg - 1.6 µg, r = 0.9992); precision (RSD = 1.8 %, n= 5 within plate and RSD = 2.3 % plate to plate); reproducibility of five time assay towards the same sample (RSD = 0.5 %); and standard addition recovery (97.17 %, RSD = 0.9 %, n = 5). The results for three real life samples are given.

J. Chromatogr. B 846 (1-2), 334-340 (2007). Salting-out TLC of sulphonamides on silica gel with aqueous solutions of salts (sulphates, chlorides, nitrates, phosphates, acetates, and thiocyanates) showed that the applied salts have different effects on the retention of sulphonamides according to Hofmeister's classification (e.g. kosmotropes, chaotropes and neutral). Parameters of the linear regression analysis were compared with QSAR data of dependences between the RM values and salt concentration. Chromatographic data obtained by salting-out TLC showed not only the physico-chemical properties of the examined compounds but also information about their activity. The method was suitable for prediction and classification of sulphonamide drugs by localization of other structurally similar compounds with antagonistic activity towards sulphonamides.