Indian Drugs 45 (3), 233-225 (2008). HPTLC of atisine in Aconitum heterophyllum on silica gel with toluene - ethyl acetate - diethylamine 7:2:1. Densitometric evaluation at 274 nm. Detection by spraying with Dragendorff reagent followed by spraying with 10 % sodium nitrate. Densitometric evaluation of reddish brown zones at 520 nm. Linearity of atisine was between 10 and 60 ng/spot.

Microbiol. Res. 163, 307-313 (2008). HPTLC of norharmane from cyanobacterial culture medium extracts on silica gel with ethyl acetate - methanol - water 200:33:27 or ethyl acetate - formic acid - water 20:2:1. The hRf values of norharmane were 65 and 20, respectively. Evaluation under UV 254 nm without further derivatization. The screening of microalgal culture medium was performed by HPTLC and HPLC.

CBS 99, 6-7 (2007). HPTLC of sildenafil in pharmaceutical products and herbal preparations (extracted with methanol) on silica gel with chloroform - methanol - diethylamine 90:10:1 in a twin-trough chamber saturated for 30 min. Quantitative determination by absorbance measurement at 305 nm. The hRf value of sildenafil was 48 and selectivity regarding matrix was given. The 4-level calibration (n=3) from 150 to 1200 ng/band showed a polynomial regression. Inter-day precision was <1 % (n=6). Mean recovery (by standard addition ) was 98.2 % for three different concentration levels.

J. Liq. Chromatogr. Relat. Technol. 31, 1458-1464 (2008). TLC of porphyrins and four alkoxy porphyrin derivatives on RP-18 with dichloromethane - methanol 3:2 saturated for 30 min. Detection by visual evaluation under white light.

60th Indian Pharmaceutical Congress PA-202 (2008). HPTLC of 6-gingerol and 3-acetyl-11-keto-beta-boswellic acid on silica gel with n-hexane - ethyl actate 7:3 in a chamber saturated at ambient temperature. Quantitative determination by absorbance measurement at 254 nm. The hRf values were 48 and 58 for 3-acetyl-11-keto-beta-boswellic acid and 6-gingerol respectively. The recovery was 98.7-100.8 % for both compounds. The chromatographic conditions were suitable for routine analysis.

J. Liq. Chromatogr. Relat. Technol. 31, 611-618 (2008). TLC of eleven new bioactive 10-substituted 2,7-diazaphenothiazines on RP-18 with acetone and aqueous TRIS (tris-(hydroxymethyl)aminomethane) buffer pH 7.4 in a saturated chamber. The concentration of acetone in the mobile phase ranged from 50-85 % in 5 % increments. Evaluation under UV 254 nm and 366 nm. The method was used for the experimental determination of lipophilicity.

60th Indian Phamaceutical Congress PA-196, (2008). HPTLC of trandolapril on silica gel with chloroform - methanol - acetic acid 16:3:1 in a saturated chamber. Quantitative determination by absorbance measurement at 210 nm. Linearity was in the range of 200-1000 ng/spot. The method was suitable for routine quality control of drug in tablet dosage form.

J. Planar Chromatogr. 21, 387-390 (2008). TLC of prostaglandin PGE2 and PGF2a on silica gel and RP-18 in a saturated chamber with methanol - dichloromethane 1:9 and 100 % acetonitrile, respectively. Detection by spraying with phosphomolybdic acid (10 % in methanol) and heating at temperatures ranging from 80 to 100 °C (for silica gel) and below 80 °C (for RP-18). Densitometric evaluation; chromatographic spot quantification, however, was performed manually using the peak height above baseline method.