60th Indian Pharmaceutical Congress PA-204, (2008). HPTLC of carvedilol on silica gel with methanol - ethyl acetate 13:7. The hRF was 49. Quantitative determination by absorbance measurement at 242 nm. Linearity was between 200-1000 ng/spot. The recovery was 98-102 %. The method was suitable for routine quality control of the drug in formulation.

J. Chromatogr. 575, 137-142 (1992). TLC on silica with dichloromethane - methanol - acetic acid 98:8:1, first run, and chloroform - methanol - acetic acid 90:60:1, second run. Detection by spraying with 5 % 4-(4-nitrobenzyl)pyridine (NBP) in acetone - 0.2 M acetate buffer, pH 4.6, 8:2, and heating at 150 °C for 10 min. Photography of the chromatograms at 500 nm. Detection limit 1 µg/mL.

60th Indian Pharmaceutical Congress PA-207, (2008). HPTLC of glibenclamide, rosiglitazone and metformin in combined dosage form on silica gel with methanol - tetrahydrofuran - water - acetate acid 40:9:10:1 with chamber saturation for 10 min. ThehRF values were 56, 60, and 80 for glibenclamide, rosiglitazone, and metformin respectively. Quantitative determination by absorbance measurement at 245 nm. The method was linear in the range of 200-1000 ng/zone (glibenclamide, rosiglitazone) and 120-600 ng/zone (metformin). Recovery was 0.97-99.3 % for all the three compounds. The method was suitable for simultaneous estimation of all three compounds in dosage form.

Chinese J. Herb Med. (Zhongcaoyao) 25, 659 (1994). TLC of bile acids on silica with isoheptanol - chloroform - acetic acid - water 20:15:2:1. Detection by spraying with 5% phosphomolybdic acid in ethanol. Quantification of taurocholic acid by densitometry at 550 nm. 15 variety of snakes are assayed.

60th Indian Pharmaceutical Congress PA-199, (2008). HPTLC of trifluoperazine and hydrochloride and chlordiazepoxide on silica gel with carbon tetrachloride - acetone - triethylamine 12:6:1. Quantitative determination by absorbance measurement at 262 nm. The method was linear in the range of 20-280 ng/spot and 50-700 ng/spot for trifluoperazine HCI and chlordiazepoxide. The method was suitable for routine quality control of combined dosage form.

Biomed. Chromatogr. 10, 144-145 (1996). TLC on silica with ether - acetone - water - acetic acid - isooctane 70:25:3:15:40. Detection by spraying first with 1 N NaOH - methanol 1:3 and then with Folin ciocalteau reagent - water 1:4. Quantification by densitometry at 600 nm, and using b-(4-hydroxy-3-phenyl), acetic acid as internal standard. The sample was cleaned up through a cyano minicolumn and extracted with ether.

J. Planar Chromatogr. 21, 305-307 (2008). HPTLC of tramadol hydrochloride and chlorzoxazone on silica gel, prewashed with methanol, in a twin trough chamber, saturated for 10 min, with ethyl acetate - toluene - ammonia 35:15:1. Quantitative determination by absorbance measurement at 273 nm.

J. Planar Chromatogr. 11, 25-29 (1998). Description of the powerful off-line combination of rapid, high-resolution overpressured-layer chromatography (OPLC) with the high sensitivity and rapidity of digital autoradiography (DAR), by which qualitative and quantitative analysis of radiolabeled metabolites in biological samples can be performed relatively quickly. OPLC/HPTLC of deramciclane (1R,2S,4R-(-)-N,N-dimethyl-2-[(1,7,7-trimethyl-2- phenylbicyclo[2,2,1]hept-2-yl)oxy]-ethaneamine 2-(E)-butanedioate) on silica gel with n-butanol - acetic acid - water 4:1:1, ethyl acetate - ethanol - triethylamine 25:25:2, acetonitrile - n-butanol - acetic acid - water 25:17:4:4 or 44:30:7:19. For comparison to the radioactivity signal, UV and fluorescence signals were evaluated at 254 and 366 nm.