J. Planar Chromatogr. 21, 107-112 (2008). Optimization and comparison of the acidic visualization methods most often used for steroids. OPLC of ethinyl estradiol, ’dienolether’ (3-methoxyestra-2,5(10)-dien-17b-ol), norethisterone, norethisterone acetate, norethisterone enanthate, nandrolone, and nandrolone decanoate on HPTLC silica gel with cyclohexanone - ethyl acetate - chloroform 1:1:1. Detection with sulfuric acid at three different concentrations, phosphomolybdic acid, and phosphoric acid with different heating temperatures for different times. Evaluation under UV 366 nm (sulfuric acid, phosphoric acid) and in white light (phosphomolybdic acid). It was found that derivatization at higher temperatures for shorter periods usually results in greater sensitivity, although heating for longer periods at lower temperatures leads to a more stable and robust result. Evaluation by videodensitometry.

J. Chromatogr. Sci. 46 (1), 10-14 (2008). Quantitative determination of rabeprazole and mosapride in their combined pharmaceutical dosage forms by TLC on silica gel with ethyl acetate - methanol - benzene 4:1:5. Quantification by densitometry at 276 nm. Linearity was between 400 and 1200 ng/spot for rabeprazole and between 300 and 900 ng/spot for mosaprid, respectively. The limit of detection was 132 ng/spot for rabeprazole and 98 ng/spot for mosapride.

J. Planar Chromatogr. 21, 125-128 (2008). TLC of a racemic mixture of diastereomeric salts formed by pipecoloxylidides (pipecoloxylidide, mepivacaine, N-ethylpipecoloxylidide, ropivacaine, bupivacaine) with O,O’-dibenzoyl-2R,3R-tartaric acid on silica gel with 1-butanol - glacial acetic acid - water 12:3:5 after chamber saturation for 2 h at 25 °C. TLC was also performed using 2-propanol, ethanol, and methanol instead of 1-butanol. Detection by spraying with 1 N potassium permanganate solution and Dragendorff reagent. Evaluation under UV light.

Ind. J. Pharm. Sci. 70(2), 233-236 (2008). HPTLC of duloxetine hydrochloride (in bulk drug and in tablet dosage form) on silica gel with chloroform - methanol 8:1. Quantitative determination by absorbance measurement at 235 nm. The method was linear in the range of 40-200 ng/spot. The method was suitable for routine quality control.

Microbiol. Res. 163, 624-632 (2008). TLC of FK506 and FK520 from the fermentation broths of Streptomyces species, on silica gel with isopropyl alcohol – benzene 3:17 or methylene chloride – acetone 2:1. Detection by bioautography with the A. IDR 721 test organism, and also by spraying the plate with cesium sulphate 1 % in sulfuric acid 10 % followed by heating at 120 °C. The hRf of the immunosupressant compounds were 50 or 60, depending on the developing solvent.

Asian J. Chem. 19(6), 4183-4187 (2007). HPTLC of atenolol and indapamide in tablet formulation on silica gel with toluene - ethanol - acetone - acetic acid 70:25:30:3. Quantitative determination by absorbance measurement at 266 nm. The hRf value of atenolol and indapamide was 21 and 74, respectively. The linearity range was 3.8-10.9 ng/spot and 0.2-0.6 ng/spot for atenolol and indapamide respectively. The recovery was in the range of 98.7-100.1 % for both compounds.

60th Indian Pharmaceutical Congress PA-08, (2008). HPTLC of ofloxacin and ornidazole on silica gel with chloroform - methanol - toluene - diethyl amine - water 20:15:25:10:1 in a saturated (20 min) twin trough chamber. Densitometric evaluation at 304 nm. The method was linear in the range of 20-250 ng/µL for both compounds. Recovery was between 100.6 and 101.2 %. The method is suitable for routine quality control.

Chromatographia 69 (1-2), 151-155 (2009). HPTLC of paracetamol and caffeine on RP18W with methanol - acetic acid - water 250:43:707. Quantification by absorbance measurement at 254 nm. The limit of detection and limit of quantitation for paracetamol was 100 and 191 ng/spot and 40 and 76 ng/spot for caffeine. Recovery was in the range of 99.6 - 106.8 % and the repeatability of the method was RSD < 1.9 %.