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.

Indian Drugs 47(2), 71-74 (2010). HPTLC of irbesartan and hydrochlorothiazide on silica gel with acetone - chloroform - ethyl acetate - methanol 6:6:6:1. The plates were preconditioned for 10 min in a saturated chamber prior to development. The hRf value of irbesartan was 27 and of hydrochlorothiazide 37. The linearity was 1500-9000 ng/band and 125-750 ng/band for irbesartan and hydrochlorothiazide respectively. The average recovery for both drugs was 99.4-99.5 %.

J. Planar Chromatogr. 23, 359-364 (2010). TLC of four series of carbamates of 3-hydroxy- and 4-hydroxyphenyl-acetamides, 4-benzylpiperidine and 1-benzylpiperazine on RP-18 with mixtures of acetonitrile and water containing 45-90 % organic modifier, with chamber saturation for 2 h at ambient temperature. Detection under UV light at 254 nm. The results obtained were compared with theoretical lipophilicity calculated by use of ChemOffice, QikProp, and Pallas software.

1. Separation on silica by thin-layer and high-performance liquid chromatography. J. Chromatogr. 328, 279-287 (1985). HPTLC of bis-quaternary aminosteroids (pipecuronium bromide and related steroids) on silica with methanol - acetonitrile - conc. NH3 514:386:100 containing 0.005 mole/l ammonium chloride and 0.08 mole/l ammonium carbonate. Detection by immersion of the plate in Dragendorff reagent. Densitometry by absorbance at 525 nm.

J. Chromatogr. 607, 105-111 (1992). TLC of insecticidal amides on silica with chloroform - methanol 10:1, and hexane - ethyl acetate 3:1, followed by reverse-phase HPLC. Detection by their insecticidal activity and purification of five different active amides. Identification by spectral and chemical methods.

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.

Research Journal of Pharmaceutical, Biological and Chemical Sciences 1(4), 152-157 (2010). TLC on silica gel with methanol - 10 mM ammonium acetate 3:2 . The hRf value of ranolazine was 49. Densitometric evaluation at 271 nm. The method was linear in the range of 1-6 µg/band with a mean recovery of 100.0 %.