International Journal of PharmTech Research 3(2), 1174-1178 (2011). TLC of lamotrigine on silica gel with ethyl acetate - chloroform - water 18:6:5. The hRf value was 40. Quantitative determination at 240 nm. The linearity was in the range of 98-590 ng/band with an average recovery of 100.2 %. LOD and LOQ were 44 and 122 ng/zone.

J. Chromatogr. 329, 153-159 (1985). HPTLC of non-dialyzed and dialyzed allergen extracts of various pollens on silica with chloroform -methanol 25 % NH3 - water 58:32:8:2. Detection with iodine, ninhydrin or molybdatophosphoric acid. Histamine was clearly separated from a mixture of proteins which remained at the point of application.

J. Chromatogr. 503, 288-292 (1990). Reverse-phase TLC on C-18 silica with first 60% aqueous methanol containing 0.1% phosphoric acid adjusted to pH 7.3 with potassium hydroxide, and then with 50% methanol containing 0.5 M sodium chloride. Detection by spraying with Van Urk’s reagent. Quantification by densitometry at 600 nm. Detection limit 5 ng/spot.

2. Comparison of the selectivity of the systems and quantitative determination of hydrophobicity parameters. J. Planar Chromatogr. 8, 122-128 (1995). Comparison of the chromatographic behavior of some sulfonamides on normal and reversed phase TLC plates with methanol, isopropanol, ethanol, ethyl acetate, acetonitrile, MEK, dioxane and THF. Appropriation of a large amount of information about the hydrophobicity (RM°), the mechanism of adsorption, and the possibilities of separation of the sulfonamides by systematic investigation. The methods described are less expensive than GC and HPLC and easily be adapted for application in most routine quality control laboratories.

J. Agric. Food Chem. 46, 707-717 (1998). Purification and sample preparation TLC of diphenylamine, 3-hydroxy- and 4-hydroxy-diphenylamine, 4,4'-dihydroxy-diphenylamine on silica gel with n-hexane - ethyl acetate - NH3 10:10:1; 2 x, n-hexane - acetone -acetic acid 10:10:1, ethyl acetate - acetic acid - water 92:8:4, 1-butanol - acetic acid - water 3:2:2. Visualization by exposure to short wave UV light; radiochromatograms were obtained by scanning of the TLC plates. Application of two-dimensional TLC for the characterization of aglycons.

J. Planar Chromatogr. 17, 233-237 (2004). TLC of biogenic amines (dopamine, adrenaline, noradrenaline, 3-methoxytyramine, methanephrine, normethanephrine, vanillylmandelic acid, homovanillic acid, 3,4-dihdroxyphenylacetic acid, 3,4-dihydroxyphenylethyleneglycol, 3-methoxy-4-hydroxyphenylethyleneglycol) and methylxanthines (1-methylxanthine, 7-methylxanthine, theophylline, paraxanthine, theobromine, caffeine) on silica gel with mobile phases comprising a non-polar or weakly polar diluent (chloroform, heptane, or hexane) and a polar modifier (tetrahydrofurane, dioxane, acetone, or ethyl acetate). Examination under UV light or detection with a solution of iron(III) chloride (5 g) and iodine (2 g) in 50 mL of 20 % aqueous tartaric acid. Relationship between Rf values and mobile phase composition was investigated.

Asian Journal of Chemistry 22(4), 3283-3291 (2010). TLC of vitamins B1, B6, and B12 in formulations on bentonite-coated TLC plates (0.3 mm) with iso-butylalcohol - methanol - chloroform - acetic acid - ammonia 75:10:35:4:5. The hRf value of vitamin B1 was 26, of B6 37 and of B12 68. The method was linear in the range of 500-4000 ng/band for all three vitamins. Densitometric quantification at 275 nm for B1, B6, and B12 and at 525 nm for B12.

Research Journal of Pharmaceutical, Biological and Chemical science 2(12), 389-396 (2011). TLC of a polyherbal formulation containing Mucuna pruriens with L-dopa as biological marker on silica gel with n-butanol - water - glacial acetic acid 4:1:1 with chamber saturation for 30 min. Detection by dipping in a 0.5 % solution of ninhydrin in ethanol, followed by heating at 120 °C for 2 min. Quantitative determination of L-dopa by densitometry in absorbance mode at 520 nm. The hRf value of L-dopa was 37. Linearity was given in the range of 600-1400 ng/zone.