J. AOAC Int. 87, 523-539 (2004). TLC of e. g. trans- and cis-18:1 isomers of fatty acids on silica gel impregnated with silver nitrate (10 % solution of silver nitrate in acetonitrile) with toluene, benzene or mixtures of toluene - hexane 1:1, hexane - diethyl ether 9:1, and hexane - chloroform. The plates are normally developed at room temperature in a dark place. The resolution of some positional 18:1 and 18:2 isomers may be improved by development at about -20° or -25 °C. Detection by spraying with 0.05 % rhodamine B in ethanol. GC after extraction.

J. Liq. Chromatogr. & Relat. Technol. 29, 2593-2602 (2006). TLC of mandelic acid and derivatives on molecularly imprinted polymers of L-mandelic acid, L-2-chloromandelic acid and L-4-chloromandelic acid as chiral stationary phases using mixtures of acetonitrile and acetic acid in different concentrations (1, 5, 10 %) with chamber saturation. Detection under UV 254 nm.

60th Indian Pharmaceutical Congress PA-214 (2008). HPTLC of cinnamic acid (in plant raw material, herbal extracts and pharmaceutical dosage forms) on silica gel with chloroform - methanol 4:1 in a saturated twin trough chamber at room temperature (25 °C). Quantitative determination by absorbance measurement at 277 nm. The hRf value for cinnamic acid was 50. The method was linear in the range of 700-1400 ng/spot.

Journal Pharmacy Research 2(9), 1542-1546 (2009) TLC on silica gel with n-hexane - ethyl acetate - glacial acetic acid 75:25:2. The hRf value was 38. Densitometric evaluation at 225 nm. The method was linear over a concentration range of 100-350 ng/band. The average recovery was 100.2 %. The samples were subjected to different stress conditions (acid, base, oxidative, heat) and all the degradation products were well resolved from the main compound. The method is suitable for stability studies and routine quality control.

Rasayan J. Chem. 2(3), 720-723 (2009). HPTLC of cefetamet on silica gel with toluene - chloroform - methanol 3:6:1. The hRf value of cefetamet was 35. Densitometric evaluation at 236 nm. The method was linear in the range of 1-5 µg/band. The recovery was 99.3-101.5 %. The method was found suitable for routine quality control.

62nd Indian Pharmaceutical Congress Abstract No. F-259 (2010). Health drinks usually contain several phytopharmaceuticals with immunomodulatory and antioxidant activities. TLC of gallic acid on silica gel with toluene – ethyl acetate – methanol – formic acid 15:15:1:4. The gallic acid content was established and the identity of the gallic acid zone in sample and standard was confirmed by UV spectra comparison.

J. Chem. Pharm Res. 2(5), 92-96 (2010). TLC of ofloxacin and cefixime on silica gel with methanol - ethyl acetate - 25 % ammonia 7:7:3. The hRf value of ofloxacin was 61 and of cefixime 78. The method was linear in the range of 50-500 ng/band. The recovery was in the range of 99.3-102.2 %. Quantitative determination by densitometry in absorbance mode at 295 nm.

J. Planar Chromatogr. 25, 320-325 (2012). HPTLC of ursolic acid in the leaves of Diospyros melanoxylon on silica gel with chloroform - methanol 19:1. Detection by dipping in 5 % methanolic sulphuric acid reagent and heating at 105 °C for 3 min. Quantitative determination by absorbance measurement at 540 nm. Linearity was in the range of 50-450 ng/zone for ursolic acid. Limits of detection and quantification were found to be 20 and 40 ng/zone. Recovery (by standard addition) was 97.5 %.