J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (4), 410-414 (2005). TLC of the extracts of the title Chinese traditional patent medicine on silica gel with 1) chloroform - ethyl acetate - methanol - formic acid 400:25:50:1 2) the lower phase of chloroform - methanol - water 32:17:5; 3) n-hexane - chloroform - water 15:8:2. Detection 1) by spraying with 5 % vanillin - H2SO4 solution and heating mildly until the spots are visualized; 2) by spraying with 2 % AlCl3 in methanol and inspection under UV 365 nm; 3) by exposing to iodine vapour. Identification by fingerprint techniques. Quantification of paeoniflorin by HPLC.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (6), 740-742 (2005). TLC of liquorice and Albizia julibrissin Durazz flowers on silica gel with cyclo hexane - ethyl acetate - acetic acid 17:3:1. Detection by spraying with 5 % solution of vanillin - H2SO4 followed by heating until the spots are visualized. Identification by fingerprint technique.

J. Chil. Chem. Soc. 48, 71-73 (2003). HPTLC validation of carbamazepine in saliva samples on silica gel previously activated at 130 ºC for 20 min. Development over 5 cm in a saturated chamber with ethyl acetate – toluene – methanol 5:4:1. Detection by dipping in 60 % perchloric acid in ethanol – water 1:1, followed by heating at 120ºC for 7 min. Quantitative determination by fluorescence measurement at 366 nm. Linearity is between 0.5 and 15.0 ng per spot. The detection limit is 0.18 ng and the quantification limit is 0.54 ng. Precision: The analysis shows an intra-assay variation between 5.1 - 7.4 % and an inter-assay variation between 5.6 - 7.4 %. The method allows separation of carbamazepine from its main metabolites 10,11-dihydrocarbamazepine and carbamazepine-10,11-epoxide.

Chromatographia 66 (11-12), 605-608 (2007). HPTLC of both isomers of cefpodoxime proxetil on silica gel plate with toluene - acetonitrile 3:2. Quantification by densitometry at 234 nm. The limit of detection and quantification was 150 and 400 ng/zone, respectively.

Chromatographia 67 (5-6), 487-490 (2008). Simultaneous determination of escitalopram oxalate and clonazepam in a combined tablet dosage form by HPTLC on silica gel aluminum plates with toluene - ethyl acetate - triethylamine 14:7:6. Quantification by densitometry at 258 nm.

Ind. J. Pharma Sci. 70(6), 798-800 (2008). HPTLC of plumbagin in Drosera burmannii Vahl on silica gel with toluene - glacial acetic acid 55:1 (for alcoholic extracts) and toluene - chloroform - glacial acetic acid 10:10:1 (for aqueous extracts) with chamber saturation for 60 min. Evaluation in visible light at 425 nm. The alcoholic extract showed seven components, the main zone with hRf value of 56 corresponded to plumbagin. The aqueous extract showed two zones but no plumbagin.

Talanta 78 (3), 874-884 (2009). Presentation of a sensitive, selective and precise stability-indicating method for the determination of clopidogrel bisulfate in presence of its alkaline degradate and in pharmaceutical formulations. TLC on silica gel with hexane – methanol - ethyl acetate 87:10:3. Quantification by densitometry at 248 nm in the range of 0.6–3 µg/band. Recovery was 99.9 %. Clopidogrel could be determined in the presence of up to 90 % of its alkaline degradate. Method selectivity was evaluated using laboratory prepared mixtures. The analysis of clopidogrel in pharmaceutical dosage forms is possible without interference from additives.

Acta Chromatographica 20(3), 463-473 (2008). TLC on silica gel with toluene – methanol – triethylamine 35:15:1. The hRf of atenolol and lercanidipine hydrochloride was 24 and 68, respectively. Detection and quantitative determination by absorbance measurement at 275 nm. The linearity was in the range of 2-12 µg/band for atenolol and 400–2400 ng/band for lercanidipine hydrochloride. The recovery was 98.9 % for atenolol and 99.7 % for lercanidipine hydrochloride.