Planta med. 68, 980-985 (2002). Preparative TLC of pipersintenamide, piperarboricoline, sintenpyridone, ß-sitosterol, ß-sitostenone, and stigmasta-4,22-diene-3-one on silica gel with n-hexane - ethyl acetate 10:1, dichloromethane, dichloromethane - ethyl acetate 10:1, 20:1 and 30:1, chloroform, chloroform - methanol 30:1, and chloroform - acetone 15:1 and 20:1.

International Seminar on Herbal Drug Research, PN-017 (2009). HPTLC of thiocolchicoside and diclofenac sodium on silica gel with toluene - acetone - methanol - formic acid 500:200:200:1. Quantitative determination by absorbance measurement at 280 nm. The method was linear in the range of 160-800 ng/band (thiocolchicoside) and 1000-5000 ng/band (diclofenac sodium). The recovery was in the range of 99.2-100.9 for both compounds.

Research J. Pharm. and Tech. 3(4), 1106-1108 (2010). TLC of spironolactone and torsemide in combined tablet dosage form on silica gel with n-hexane - ethyl acetate - methanol - glacial acetic acid 12:6:3:1. Quantitative evaluation by absorbance measurement at 263 nm. The hRf value of spironolactone and torsemide was 67 and 34, respectively. The linearity was in the range of 100-1000 ng/band for both drugs. The method has been successfully applied for the analysis of drugs in pharmaceutical formulation.

The effect of salts. Chromatographia 21, 312-316, (1986). Determination of the lipophilicity of aniline and 36 ring-substituted aniline derivatives by reversed-phase TLC using NaCl, KCl, MgCl2, AlCl3 and tetramethyl ammonium hydroxide either adsorbed on the silica surface or added to the eluent. Discussion of the effects of salts on chromatographic behaviours. In most cases, the salts decreased the retention power of silica resulting in enhanced mobility of the aniline derivatives. The monovalent cations had the lowest while AlC3 had the highest impact on selectivity due to different ion charges.

Chromatographia 34, 537-539 (1992). Study of the retention behavior and separation ability of reverse- and normal-phase TLC on silica, RP-18 silica and acetylated cellulose with polar and nonpolar mobile phases. Measuring the retentions of a series of amides. Discussion of the retention behavior and separation ability in terms of the nature of the solutes, stationary phases, and eluents.

CBS 93, 2-4 (2004). HPTLC of signaling ceramides on silica gel with a 7 step gradient from methanol over dichloromethane to n-hexane over 42 min. Detection by dipping in manganese chloride reagent for 1 s, followed by drying at 120 °C for 20 min. Quantitative determination by absorbance measurement at 550 nm and Michaelis-Menten regression 2 via peak area. Signaling ceramides are separated from other lipids (shingomyelin, phosphatidylcholine, cholesterol) contained in cellular lipid extracts. Comparison with determination of ceramide formation via isotope labeled standards and conventional TLC method.

Eurasian J. Anal. Chem. 5(1), 25-27 (2010). An HPTLC method is reported for estimation of levodopa in seeds of Mucuna pruriens and its herbal formulation. HPTLC on silica gel with n-butanol - glacial acetic acid - water 5:1:4. Densitometric evaluation at 280 nm. The hRf value of levodopa was 39. The method was linear in the range of 100-1000 ng/band. The method is suitable for estimation of levodopa in herbal formulation.

Der Pharmacia Letter 2(4), 440-446 (2010). TLC of glibenclamide on silica gel with toluene - ethyl acetate - methanol 16:1:2. The hRf value was 45. Quantitative determination by densitometry in absorbance mode at 229 nm. The method was linear in the range of 40-200 ng/band. The recovery was 99.8 %.