CBS 97, 2-5 (2006). HPTLC of gangliosides on silica gel with chloroform - methanol - water 24:17:4 and addition of 2 mM CaCl2, after chamber saturation with filter paper for 3 h, over 80 mm, followed by drying for 5 min at room temperature. Detection by dipping in orcin solution (0.3 % (w/v) in 3 M H2SO4) followed by heating at 100 °C for 3 min. Alternative detection of GM3-bands by derivatization with primulin (0.02 % (w/v) in aceton - water 4:1). Quantitative determination by direct IR-MALDI-o-TOF-analysis. The limit of detection for GM3 was about 50 ng/zone.

59th Indian Pharmaceutical Congress F-94, 413, (2007). HPTLC of escitalopram oxalate and clonazepam in combined tablet dosage form on silica gel aluminium plate with toluene - ethyl acetate - triethylamine 7:3.5%:3. Quantitative determination by densitometric scanning at 258 nm. The calibration curve was linear over a range of 250 and 2500 ng/zone for escitalopram oxalate, and 50 and 500 ng/zone for clonazepam.

Chromatographia 66 (1-2), 95-102 (2007). HPTLC of dasatinib in the presence of its degradation products, on silica gel sheets with toluene - chloroform 7:3. Quantification by densitometry at 280 nm. The hRf value of dasatinib was 23 and selectivity regarding matrix was given. Validation of the method as per the ICH guidelines. Dasatinib was subjected to acid–alkali hydrolysis, oxidation, dry heat, wet heat and photodegradation. The drug was susceptible to acid–alkali hydrolysis and oxidation. The drug was found to be stable in neutral, wet heat, dry heat and photo-degradation conditions.

Indian J. Pharm. Sci. 69(3), 473 (2007). Dried leaves were Soxhlet extracted with methanol and concentrated. HPTLC of andrographolide in Andrographis paniculata on silica gel with chloroform - methanol 7:1 with chamber saturation for 15 min. Densitometric evaluation at 232 nm. The hRf value of andrographolide was 35, of neoandrographolide 15 and of andrographoside 3. The linearity range was 200 - 1000 ng/zone. Average andrographolide contents were 1.56 % in dried leaves sample.

59th Indian Pharmaceutical congress F-11, 392, (2007). HPTLC oleanloic acid from seeds of Achyranthes aspera on silica gel with n-hexane - ethyl acatete - acetic acid 30:201. Detection by spraying with anisaldehyde - sulphuric acid reagent. Densitometry at 530 nm for quantification of oleanolic acid. Linearity was between 200 and 1200 ng/zone. The plant tree was found to contain 0.34 % oleanloic acid. The method can be used for routine quality control.

Microbiol. Res. 163, 161-167 (2008). Test solutions containing 0.25 to 64 µg of norharmane, quinine, and tetracycline (as bases and hydrochloride salts) were applied as 10 mm bands on silica gel plates. After coating the plate with a concentrated suspension of the living cyanobacterial test organism (spraying or dipping), it was kept moist in a TLC chamber at 27 ºC for 1 to 2 days under continuous illumination (25 - 30 µmol photon/m2s). Cytotoxic concentrations of a test compound resulted in an easily recognizable regional decolourisation of the test organism.

J. Planar Chromatogr. 21, 191-195 (2008). HPTLC of fluconazole and clotrimazole (as internal standard) on silica gel with toluene - chloroform - methanol 6:15:2. Quantitation by densitometry at 210 nm.

J. Pharm. Biomed. Anal. 43 (2), 722-726 (2007). HPTLC of imatinib mesylate both as a bulk drug and in formulations on silica gel aluminium plates with chloroform - methanol 3:2. Quantitative determination by absorbance measurement at 276 nm. Linearity was between 100 and 1000 ng per spot. The limit of detection and quantitation was 10 and 30 ng, respectively. The method is repeatable, selective and accurate and can be used for stability control.