J. Planar Chromatogr. 16, 442-446 (2003). TLC of 8 new substituted 1,2-benzisothiazol-3(2H)-one derivatives on RP-18 with methanol - water, methanol - pH 1.95 glycine buffer and methanol - pH 10.0 glycine buffer at 20°C. Visualization under UV 254 nm.

J. Pharm. Biomed. Anal. 36, 33-41 (2004). A sensitive selective, precise and robust HPTLC method for the analysis of E and Z stereoisomers of guggulsterone (the hypolipidemic agent in the gum-resin exudates of Commiphora mukul) both as a bulk drug and in formulations was developed and validated. Separation on silica gel with toluene - acetone 9:1. Quantitative determination by absorbance measurement at 250 nm. This system was found to give compact spots for E- and Z-guggulsterone (Rf value of 0.38 ± 0.02 and 0.46 ± 0.02 respectively) following double development with the same mobile phase. Both E- and Z-guggulsterone showed good linearity in the concentration range of 100-6000 ng/spot. The method was validated for precision, robustness, recovery, and specificity. The proposed HPTLC method is suitable for the identification and quantitation of these isomers in herbal extracts and pharmaceutical dosage forms.

J. Planar Chromatogr. 17, 109-112 (2004). HPTLC of econazole nitrate (1-[2-[4-chlorophenyl)methoxy]-2-(2,4-dichlorophenyl)ethyl]-1H-imidazole nitrate) on silica gel in a twin-trough chamber with n-butyl acetate - carbon tetrachloride - methanol - diethylamine 6:12:5:1. Quantitative determination by reflectance/absorbance measurement at 230 nm.

J. Planar Chromatogr. 17, 342-349 (2004). TLC of 29 1,2,3,4-tetraoxanes on silica gel, cyano phase, and RP-18. The binary mobile phases ethyl acetate - petroleum ether and ethyl acetate - toluene were used under normal-phase conditions, and water - organic modifier (methanol, acetone, dioxane) under reversed-phase conditions. Chromatography was performed using a HPTLC horizontal developing chamber equilibrated for 15 min with the vapor of the mobile phase. Detection by spraying with 50 % sulfuric acid and heating until the spots became visible.

IPC 56th 2004, Abstract No. GP-8. Simultaneous HPTLC determination of ranitidine and domperidone on silica gel with methanol - 1, 4-dioxan 2:3. Quantitative determination by densitometric scanning at 282 nm. Rf values were 0.33 for ranitidine and 0.78 for domperidone. Linearity range was 0.5 – 2.5 mg/mL for both of the drugs. The recovery was in the range of 100.25 – 100.78 %. The method is suitable for the analysis of both drugs in combined dosage form.

J. Planar Chromatogr. 18, 164-166 (2005). TLC of non-steroidal anti-inflammatory drugs (NSAID), i.e. mefenamic acid, naproxen, ibuprofen, flurbiprofen, ketoprofen, paracetamol, and diclofenac, on silica gel with chloroform - methanol , chloroform - ethyl acetate, acetonitrile - methanol - water, acetonitril - methanol in different proportions. Detection with iodine vapor.

J. AOAC Int. 88, 1549-1554 (2005). TLC of polymyxin B, framycetin, and dexamethasone on silica gel with methanol and methanol - n-butanol - 25 % ammonia - chloroform 14:4:9:12 for framycetin and polymyxin B. Quantitative determination by densitometry at 550 nm after detection with 0.3 % ninhydrin solution. Dexamethasone was separated with cyclohexane - ethyl acetate 2:3, quantitative determination by absorbance measurement at 245 nm. Similar accuracy, relative standard deviation values from 1.49 to 2.47 % and relative error values from 0.02 to 0.81 % are comparable to those obtained with the reference methods.

J. Planar Chromatogr. 18, 460-464 (2005). HPTLC of ethamsylate and mefenamic acid on silica gel prewashed with methanol, in a pre-saturated twin-trough chamber with chloroform - methanol - acetic acid 50:40:1. After drying at 50 °C for 5 min quantitative determination by absorbance measurement at 300 nm. The validated calibration range was 500-2500 ng/spot (r = 0.998) and 500-2500 ng/spot (r = 0.997) for ethamsylate and mefenamic acid, respectively.