J. Planar Chromatogr. 18, 188-193 (2005). HPTLC of of bezafibrate and ciprofibrate in tablets and capsules on diol phases with hexane - tetrahydrofuran 4:1. Quantitative determination by absorbance measurement at 227 nm and videoscanning at 254 nm. Recovery measured by use of densitometry was 100.3 % (RSD 7.8 %) for bezafibrate and 98.0 % (RSD 6.1 %) for ciprofibrate. Videodensitometry resulted in recovery of 96.2 % (RSD 9.8 %) and 97.8 % (RSD 11.2 %), respectively.

J. AOAC Int. 87, 1319-1322 (2004). TLC of chlorpheniramine and pheniramine maleate in combination with other drugs in pharmaceutical preparations of tablets, syrups, eye and ear drops etc. on silica gel with cyclohexane - chloroform - methanol - diethylamine 9:8:1:2. Detection under UV light at 254 nm and quantitative determination by scanning at 260 nm. Recoveries of CPM and PM were 100.1 +/- 0.8 % and 100.1 +/- 0.9 %, respectively.

Indian Drugs 42 (6), 340-344 (2005). HPTLC of captopril and hydrochlorothiazide in tablets on silica gel with methanol - toluene - ethyl acetate - glacial acetic acid 2:12:6:1. Quantitative determination by absorbance measurement at 219 nm. The Rf value of hydrochlorothiazide was 0.38 and of captopril 0.57. The calibration curve response was 4-14 µg for both drugs. Recovery was determined by standard addition method. The percent recovery by area was found to be 100.25 for captopril and 99.98 for hydrochlorothiazide. The method was suitable for routine quality control of such formulations.

TLC/HPTLC fingerprint profile. Indian Drugs 42 (7), 417-423 (2005). Unripe, powdered fruits of Mimusops elengi Linn. extracted individually and successively with acetone and methanol were evaluated for antimicrobial activity. HPTLC on silica gel with toluene - ethyl acetate - chloroform - acetic acid 35:35:28:2. Detection under UV 254 nm, 366 nm and after spraying with anisaldehyde sulphuric acid reagent for qualitative evaluation for different phyto constituents.

12. Isolation and identification of an isomeric impurity in danazol. Pharm. Research 12, 295-298 (1995). TLC of isodanazol according to The United States Pharmacopoeia XXII, 1990, pp. 379-380 and K. Ferenczi-Fodor, Z. Végh, Z. Pap-Sziklay, J. Planar chromatogr. 6, 198-203 (1993). Ferenczi-Fodor described a validated method for the selective determination of three individual impurities in danazol based on TLC-densitometric measurement at 252 nm. The Rf values of danazol and isodanazol in the TLC systems of USP XXII are 0.29 and 0.33, respectively, while in the system of Ferenczi-Fodor et al. 0.47 and 0.58.

Acta Chrom. 12, 143-150 (2002). HPTLC of caffeine in pharmaceutical preparations on silica gel with ethyl acetate – methanol 17:3. Densitometry at 275 nm. Tablet, coated tablet, and coated caplet products containing caffeine as the active ingredient were analyzed to test the applicability of the new method.

Pharmazie 60, 13-17 (2005). TLC of 3-benzyl-5-(4-fluoro-benzylidene)-1-methyl-2-thioxo-imidazolidin-4-ones, 5-benzylidene-3-(4-nitro-benzyl)-2-thioxo-imidazolidin-4-ones, and 4-acridin-9-ylmethylene-1-benzyl-5-thioxo-imidazolidin-2-ones (e. g. 5-(4-fluoro-benzylidene)-1-methyl-2-thioxo-imidazolidin-4-one, 3-benzyl-5-(4-fluoro-benzyidene)-1-methyl-2-thioxo-imidazolidin-4-one) on silica gel with chloroform - methanol 96:4; 99:1; and 98:2; n-hexane - ethyl acetate 7:3; 6:4; and 5:5; and benzene - ethyl acetate 7:3. Detection under UV light.

Indian Drugs 44 (3), 220-223 (2007). TLC of the volatile oil of Sufoof-E-Suzak Qawi, an Unani medicine, on silica gel with different mobile phases. Detection under UV 254 and 366 nm, and with vanillin sulphuric acid reagent, iodine vapour, and 5 % ethanol sulphuric acid.