(Problems in the separation of isomeric 2-aminobenzo phenones as intermediates in the preparation of anellated 1,4-benzodiazepines.) Fresenius Z. Anal. Chem. 318, 241-242 (1984). TLC of isomeric 2-amino benzo phenones on silica with cyclohexane - ethyl acetate 5:5. Detection by UV 254 nm.

V. Thin-Layer Chromatography on silica gel vs. alumina of 3,4-disubstituted isochroman-1-ones including spiro analogues. J. Liq. Chromatogr. Relat. Technol. 28, 2539-2550 (2005). TLC of 8 substituted isochromanones and 4 spiro analogues on silica gel and alumina with 10 computer selected mobile phases. The procedure takes into account the adsorption properties of the mobile phase (parameter epsilon and tuning parameters m and P’), stationary phase and sample structure expressed by the relevant group. Silica gel was more effective and did not cause decomposition in contrast to the alumina phase.

J. Microchem. 31, 298-303 (1985). TLC determination of 5-aza-2'-deoxycytidine and degradation products on cellulose with butanol - acetic acid - water 10:1:3. Detection by UV 254 nm and with FCNP reagent (10 % aq. NaOH solution, 10 % aq. potassium ferricyanide solution, 10 % aq. sodium nitroprusside solution, water 1:1:1:3 - one part of this solution is mixed with acetone 1:1 before spraying.

J. Liq. Chromatogr. Relat. Technol. 29, 877-887 (2006). HPTLC of curcuminoids (curcumin, demethoxycurcumin, and bis-demethoxycurcumin) on spherical silica gel with chloroform - methanol 49:1 with chamber saturation. Densitometry at 366 nm in adsorption-reflection mode.

J. Planar Chromatogr. 3, 20-23 (1990). HPTLC separation and identification of open intermediates and final products in synthesis of 6 and 7-substituated 3-methylquinoxalin-2(1H)-ones on silica gel with benzene – methanol 9:1. Visualization by UV 254 and 366 nm. The diaza-isomers appeared as dark blue spots on green background at 254 nm, and had light blue fluorescence at 366 nm on blue background. Open products did not fluoresce at 366 nm. Concentrations of samples were about 10-4 to 10-6 M for the intermediates.

J. Planar Chromatogr. 4, 416 (1991). TLC of a-tocopherol on silica with benzene - acetone 9:1. Quantification after elution by spectrometry.

Indian Drugs 32 (4), 166-171 (1995). HPTLC of amiloride (A) and frusemide (F) on silica with ethyl acetate - methanol - NH3 (18%) 75:10:8. Quantification by densitometry at 275 nm using diloxanide as internal standard. Linearity range 20-120 ng for A and 240-320 ng for F with average recovery of 99.75 % and 100.05 % respectively.

Indian Drugs 33 (5), 208-212 (1996). HPTLC of azatadine maleate and pseudoephedrine HCl along with paracetamol in tablets on silica with dichloromethane - acetone - methanol - triethylamine 70:40:5:2. Densitometry at 257 nm. Diphenhydramine was used as internal standard. The linearity range was found to be 100-700 ng for azatadine maleate, 6-42 mg for pseudoephedrine HCl and 10-70 ng for paracetamol.