J. Planar Chromatogr. 19, 10-14 (2006). OPLC of D-xylitol, L-arabitol, D-glucitol , D-xylose, L-arabinose, D-glucose, and L-rhamnose on silica gel with overrunning elution. Acetonitrile - acetic acid - water 63:33:5 was used as mobile phase. The upper limits of linearity were in the range 140-600 ng and detection limits were 15-50 ng per spot.

Talanta 61 (5), 581-589 (2003). TLC of clopidogrel bisulphate on silica gel with carbon tetrachloride - chloroform - acetone 12:8:3. Rf value of clopidogrel bisulphate was 0.30. Clopidogrel bisulphate was subjected to acid and alkali hydrolysis, oxidation, photodegradation and dry heat treatment. The drug was susceptible to acid - base hydrolysis, oxidation and dry heat degradation. Also the degraded products were well separated from the pure drug with significantly different Rf values. Quantitative determination by absorbance measurement at 230 nm. The linear regression data for the calibration plots showed good linear relationship with r2=0.999 in the concentration range of 200-1000 ng. The mean value of correlation coefficient, slope and intercept were 0.999±0.001, 0.093±0.011 and 8.83±0.99, respectively. The method was validated for precision, accuracy, ruggedness and recovery. The limits of detection and quantitation were 40 and 120 ng per spot, respectively.

CBS 96, 14-15 (2006). TLC of glibenclamide as adulterant in antidiabetic herbal drugs, on silica gel with toluene - ethyl formate - formic acid 5:4:1 in a saturated twin trough chamber over 150 mm. Detection under UV 365 nm, quantification of the image with VideoScan software. Rf of glibenclamide is 0.58. Results were compared with those obtained by UV spectrophotometry and HPLC and showed good correlation.

J. Planar Chromatogr. 19, 238-240 (2006). HPTLC of plant extracts, using pellitorine and dihydropiperlongumine as markers, on silica gel in a twin-trough chamber saturated with the mobile phase hexane - ethyl acetate 3:1. Quantitation by densitometry in absorbance/reflectance mode at 260 nm.

Acta Chrom. 6, 7-12 (1996). HPTLC of fructose, glucose and sucrose on silica gel with concentration zone. Impregnation of the layer (except concentration zone) by spraying with 0.1 M sodium bisulfate solution, followed by drying and spraying with citrate buffer of pH 4.8. Three-fold development with acetonitrile - deionized water 17:3 after chamber saturation. Visualization by spraying with 1-naphthol - sulfuric acid reagent and heating at 110 °C. Quantification by densitometry at 515 nm.

Acta Chrom. 11, 96-101 (2001). HPTLC of the muscle relaxant carisoprodol on silica gel uniplates with inorganic binder and fluorescent indicator, prewashed with dichloromethane – methanol 1:1, with chloroform – acetone 4:1 as mobile phase. Detection by spraying with conc. sulfuric acid – methanol 1:1 followed by heating at 150 ºC for 5 min. Quantitative determination by absorbance measurement at 550 nm. The method was applied to tablets containing carisoprodol as the only active ingredient and to tablets containing carisoprodol with aspirin and with aspirin plus codeine phosphate.

J. Planar Chromatogr. 19, 427-431 (2006). HPTLC of sildenafil citrate on silica gel, pre-washed with methanol, with toluene - acetone - methanol 3:1:1 in a saturated twin-trough chamber. Quantitative determination by absorbance measurement at 312 nm. The method was validated in accordance with ICH guidelines on the validation of analytical methods.

J. Liq. Chromatogr. & Relat. Technol. 29, 2167-2180 (2006). HPTLC of neutral lipids on prewashed silica gel with petroleum ether - diethyl ether - glacial acetic acid 80:20:1; and of methyl and steryl esters with hexane - petroleum ether (35-60°C) - diethyl ether - glacial acetic acid 50:25:5:1 in a twin trough chamber saturated for 20 min. Detection by spraying with a 50 % solution of phosphomolybdic acid in ethanol, followed by heating at 115°C for 10 min. Polar lipids were separated with chloroform - methanol - water 65:25:4. Detection by spraying with 10 % cupric sulfate solution, followed by heating at 140 °C for 10 min. Quantitative determination by absorbance measurement at 610 nm for neutral lipids and at 370 nm for polar lipids.