J. AOAC Int. 92, 1082-1087 (2009). HPTLC of alprazolam and fluoxetine hydrochloride in pure powder and formulations on silica gel with acetone - toluene - ammonia 12:7:1 in a twin trough chamber saturated for 30 min. Quantitative determination by absorbance measurement at 230 nm. There was no significant difference in the determined content of alprazolam and fluoxetine by HPTLC and HPLC methods (assay results compared by applying the paired t-test).

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, 287-291 (2009). HPTLC of the biomarkers gallic acid, lupeol, oleanolic acid, and stigmasterol and plant extracts on silica gel with toluene - ethyl acetate - formic acid 5:5:1 for gallic acid and with toluene - ethyl acetate 4:1 for lupeol, oleanolic acid, and stigmasterol in a saturated twin trough chamber. Quantitative determination by absorbance measurement at 272 nm. Detection of oleanolic acid, lupeol, and stigmasterol by dipping in anisaldehyde reagent followed by heating at 110 °C for 5 min. Densitometric evaluation at 652 nm.

J. Planar Chromatogr. 22, 367-369 (2009). HPTLC of triterpenoids (alpha- and beta-amyrin, oleanolic acid) on silica gel prewashed with methanol and dichloromethane, with dichloromethane - ethyl acetate 37:3. in a horizontal chamber saturated for 15 min. Detection by spraying with 8 % sulfuric acid in ethanol and heating at 105 °C for 3 min. Evaluation in daylight and under UV 366 nm. Quantitative determination by absorbance measurement at 520 nm.

International Seminar on Herbal Drug Research, PN-064 (2009). HPTLC of gallic acid as marker compound in triphala fast dispersable tablets on silica gel with ethyl acetate - toluene - methanol - glacial acetic acid 75:20:3:2. Results from HPLC analysis were comparable. The method was suitable for routine quality control of dispersable tablets formulation.

J. Planar Chromatogr. 23, 219-224 (2010). TLC of carotenoids (lutein, beta-carotene), astaxanthin and tannin on silica gel with petroleum ether - diethyl ether - acetone 15:3:2 in a twin-trough chamber saturated for 30 min at room temperature. Quantitative determination by densitometric absorbance measurement at 450 nm. The hRf values of lutein in tea, mulberry, and cassava leaf were 19, 22, and 19 and corresponded to lutein standard. The least polar zone had an average hRf value of 98, 98, and 96 for tea, mulberry, and cassava leaf, respectively, and was identical with beta-carotene standard.

J. Planar Chromatogr. 23, 129-133 (2010). TLC of glicazide and glipizide on RP18 silica gel with 60 % acetonitrile in pH 2.3 phosphate buffer in an unsaturated horizontal chambers at room temperature. Detection and quantitative determination by absorbance measurement at 215 nm. Linearity was in the range of 0.8-1.8 µg/zone for both drugs and the correlation coefficients r were 0.998 for gliazide (hRf 38) and 0.993 for glipizide (hRf 51). LOD and LOQ were 50 and 200 ng/zone, respectively, for glicazide and 60 and 300 ng/zone for glipizide.

Phytochem. Anal. 21, 219-223 (2010). HPTLC of safranal in saffron extract and in a safranal-loaded nanoparticle formulation on silica gel with n-hexane - ethyl acetate 9:1. Quantitative determination by absorbance measurement at 310 nm. The hRf of safranal was 51. Linearity was between 0.5 and 5.0 µg/zone. The intra-day and inter-day precisions were 1.08-2.17 and 1.86-3.47 %, respectively. LOD was 50 ng/zone while LOQ was 150 ng/zone. The average recovery was 99.9 %. The proposed method provides significant advantages in terms of greater specificity and rapid analysis.