60th Indian Pharmaceutical Congress PA-233 (2008). HPTLC of glycyrrhizic acid on silica gel with toluene - ethyl acetate - glacial acetic acid 25:15:1. The hRf value of glycyrrhizic acid was 52, linearity was between 500-1000 ng/mL and recovery was 99.2 %. Withanolide A was separated with toluene - ethyl acetate - glacial acetic acid 20:20.1. The hRf value of withanolide A was 44, linearity was in the range of 400-1000 ng/mL and recovery was 99.4 %.

60th Indian Pharmaceutical Congress PA-210 (2008). HPTLC of amitriptyline HCl, trifluoperazine HCl, risperidone and alprazolam on silica gel with carbon tetrachloride - acetone - triethylamine 80:20:3. Quantitative determination by absorbance measurement at 250 nm in the range of 50-1200 ng/spot for amitriptyline HCl, 50-1200 ng/spot for trifluoperazine HCl, 100-2400 ng/spot for risperidone, and 25-600 ng/spot for alprazolam. The limit of quantification for amitriptyline HCl and trifluoperazin HCl was 50 ng/spot, for risperidone 100 ng/spot, and for alprazolam 25 ng/spot.

Abstract No. F-252, 61st IPC (2009). HPTLC of tenofovir on silica gel with n-butanol - acetic acid - water 4:1:1. The hRf value was 58. Quantitative determination by absorbance measurement at 260 nm. Linearity was in the range of 120-600 ng/band. The compound was subjected to different stress conditions (acid, alkali, oxidation, photodegradation and thermal) and degradations products were well resolved from the main component.

J. Planar Chromatogr. 22, 399-403 (2009). TLC of celecoxib, etoricoxib, and valdecoxib on silica gel with chloroform - acetone - toluene 12:5:2 with chamber saturation for 15 min at room temperature. Quantitative determination by absorbance measurement at 254 and 290 nm.

Talanta 78 (3), 874-884 (2009). Presentation of a sensitive, selective and precise stability-indicating method for the determination of clopidogrel bisulfate in presence of its alkaline degradate and in pharmaceutical formulations. TLC on silica gel with hexane – methanol - ethyl acetate 87:10:3. Quantification by densitometry at 248 nm in the range of 0.6–3 µg/band. Recovery was 99.9 %. Clopidogrel could be determined in the presence of up to 90 % of its alkaline degradate. Method selectivity was evaluated using laboratory prepared mixtures. The analysis of clopidogrel in pharmaceutical dosage forms is possible without interference from additives.

IPA Convention, 2010, RA-PO 26. HPTLC of risedronate sodium on silica gel with water - methanol - 25 % ammonia 20:3:3. Densitometric evaluation at 262 nm. The method was linear in the range of 3-6 ng/band, recovery was 98.6 %. Results were comparable with HPLC results. The advantage of the HPTLC method is the simultaneous analysis of several samples.

Indian Drugs 47(2), 71-74 (2010). HPTLC of irbesartan and hydrochlorothiazide on silica gel with acetone - chloroform - ethyl acetate - methanol 6:6:6:1. The plates were preconditioned for 10 min in a saturated chamber prior to development. The hRf value of irbesartan was 27 and of hydrochlorothiazide 37. The linearity was 1500-9000 ng/band and 125-750 ng/band for irbesartan and hydrochlorothiazide respectively. The average recovery for both drugs was 99.4-99.5 %.

International Seminar on Herbal Drug Research, PN-024 (2009). HPTLC of catechins and epicatechin in leaves of tea (Camellia sinensis on silica gel with toluene - ethyl acetate - formic acid 7:5:1. Quantitative determination by absorbance measurement at 254 nm. The leaves were found to contain 10-24 % of total polyphenols.