Asian J. Chem. 19(7), 5634-5638 (2007). TLC of rabeprazole sodium and itopride hydrochloride on silica gel prewashed with methanol, with toluene - chloroform - methanol - 25 % ammonia 5:6:2. Quantitative determination by absorbance measurement at 225 nm. Linearity was between 120 and 280 µg/mL for rabeprazole sodium and 900 and 1900 µg/mL for itopride hydrochloride. The recovery (by standard addition method) was between 98.1 and 99.5 % for both drugs. The proposed method is precise and accurate and can be used for routine analysis of rabeprazole sodium and itopride hydrochloride in capsule formulation.

60th Indian Pharmaceutical Congress PA-198, (2008). HPTLC of simvastatin on silica gel with toluene - ethyl acetate - formic acid 16:3:1. Quantitative determination by absorbance measurement at 242 nm. The method was linear in the range of 200-1000 ng/spot and suitable for routine quality control of bulk drug and its dosage forms.

Asian J. Chem. 19(5), 3621-3636 (2007). TLC of ornidazole and cefixime on silica gel with methanol - water 3:2. Quantitative determination by absorbance measurement at 254 nm. Linearity was between 250 and 2500 µg/mL for ornidazole and 100 and 900 µg/mL for cefixime. The recoveries of drugs by standard addition method were found in the range of 98.0 and 89.4 % for both drugs. The method is suitable for routine quality control.

Anal. Chim. Acta 577 (1), 46-51 (2006). HPTLC of trigonelline in herbal extracts and in pharmaceutical dosage forms on silica gel with n-propanol - methanol - water 4:1:4. Quantitative determination by absorbance measurement at 269 nm. Linearity was between 100 - 1200 ng/spot (via peak area) and the correlation coefficient was 0.9991. The trigonelline content of herbal extracts quantified and estimated from the formulation was found to be well within limits (± 5 %) of the labeled content of the formulations. The method is reproducible and selective for the estimation of trigonelline by statistical analysis of the data.

Abstracts No. 9156, IHCB (2009). TLC of Hoodia gordonii on silica gel with ethyl acetate - methanol - water 36:7:5. Photodocumentation and estimation was carried out by the DISTA method. The authentication of hang-off capsules, which contained several plant ingredients used to prevent hang-over, was performed by TLC on silica gel with toluene - ethyl acetate 9:1. Detection by spraying with vanillin-sulfuric acid reagent.

Indian J. Pharma. Sci. 70(6), 831-834 (2008). HPTLC of sumatriptan on silica gel (pre-washed) with methanol - water - glacial acetic acid 40:80:1 with chamber saturation for 10 min. Quantitative determination by absorbance measurement at 230 nm. The hRf value was 64. The method was linear in the range of 200-800 ng/spot.

Abstract No. 9923, IHCB (2009). HPTLC of several herbal formulations (tablets extracted with methanol) on silica gel with toluene - ethyl acetate 19:1. The fingerprint method was suitable for correct identification and for routine quality control of the herbal extracts.

Acta Chromatographica 20 (4), 637-642 (2008). TLC of thiamine hydrochloride from riboflavin, nicotinic acid, calcium D-pantothenate, pyridoxine hydrochloride, cyanocobalamin, and ascorbic acid on silica gel with dioxane - water 1:1. Detection under UV light. Examination of the effect of impurities (metal cations and inorganic anions) on the chromatography of thiamine hydrochloride. The detection limit for thiamine hydrochloride was 90 ng/spot and %RSD of thiamine hydrochloride was 14.9 % (n=5).