International Journal of PharmTech Research 3(2), 1174-1178 (2011). TLC of lamotrigine on silica gel with ethyl acetate - chloroform - water 18:6:5. The hRf value was 40. Quantitative determination at 240 nm. The linearity was in the range of 98-590 ng/band with an average recovery of 100.2 %. LOD and LOQ were 44 and 122 ng/zone.

J. Liq. Chromatogr. Relat. Technol. 32, 1241-1258 (2009). HPTLC of 11 pesticides in water samples on silica gel with ethyl acetate - n-heptane 2:8, 3:7, 2:3 or 7:30. Quantitative determination by absorbance measurement between 200 to 600 nm with average optical resolution better than 2.0 nm. Linearity was between 0.1 and 17 µg/zone for all pesticides. The LOD was between 40-650 ng/zone. Results were comparable with a HPLC method.

J. Planar Chromatogr. 24, 503-506 (2011). HPTLC of oleanolic acid in extracts of dried roots on silica gel with toluene - ethyl acetate - glacial acetic acid 70:30:1 in a saturated twin-trough chamber. Detection by spraying with anisaldehyde-sulfuric acid reagent and heating in an oven at 110 °C for 5 min. Quantification was performed by immediate densitometric absorbance measurement at 529 nm. The average recovery was 98.9 %. LOD and LOQ were 10 and 30 ng/zone, respectively. The hRf value was 58. Linearity was between 100 and 1000 ng/zone. Precision (%RSD) was 1.4 %.

J. AOAC Int. 93, 904-910 (2010). HPTLC of imipramine hydrochloride and chlordiazepoxide on silica gel with carbon tetrachloride - acetone - triethylamine (pH 8.3) 20:10:1 in a twin-trough chamber after saturation for 30 min at 25 °C. Quantitative determination by densitometry in absorbance mode at 240 nm. Linearity was between 50-600 and 20-240 ng/zone with mean accuracies of 99.5 and 100.6 % for imiprazine hydrochloride and chlordiazepoxide, respectively. The hRf value of imipramine was 73 and of chlordiazepoxide 32. The %RSD values of intra-day and inter-day precision were between 0.7-1.4 % and 0.4-1.2 % for imipramine and 0.8-1.7 % and 0.7-1.3 % for chlordiazepoxide.

J. of China Three Gorges Univ. Natural Sciences 33 (4), 92-95 (2011). TLC of extracts of Biyuan Pills on silica gel 1) for Magnolia liliiflora Desr. with dichloromethane - ethyl acetate 9:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 90 °C until the zones were detected; 2) for Xanthium sibiricum Patr., with chloroform - ethyl acetate - methanol - water - formic acid 3:10:2:2:2, detection by exposure to iodine vapor until the zones were detected; 3) for Lonicera japonica and Chrysanthemum indici flos, with toluene - ethyl acetate - formic acid - glacial acetic acid - water 1:15:1:1:2, detection under UV 365 nm.

J. Planar Chromatogr. 25, 320-325 (2012). HPTLC of ursolic acid in the leaves of Diospyros melanoxylon on silica gel with chloroform - methanol 19:1. Detection by dipping in 5 % methanolic sulphuric acid reagent and heating at 105 °C for 3 min. Quantitative determination by absorbance measurement at 540 nm. Linearity was in the range of 50-450 ng/zone for ursolic acid. Limits of detection and quantification were found to be 20 and 40 ng/zone. Recovery (by standard addition) was 97.5 %.

J. Liq. Chromatogr. Relat. Technol. 35, 1213-1221 (2012). HPTLC of nicotine in cigarettes on silica gel with n-hexane - methylene chloride - methanol 4:16:3. Quantitative determination by absorbance measurement at 254 nm. Linearity was in the range of 0.1-1 mg/mL. Precision was estimated with an %RSD below 2.0. Limits of detection and quantification were 0.008 mg/mL and 0.02 mg/mL, respectively. The method provides acceptable intra-day and inter-day precision for nicotine. Recovery was between 97.5 and 98.4 %, respectively.

J. Liq. Chromatogr. Relat. Technol. 35, 2753-2764 (2012). HPTLC of melitracen hydrochloride (1) and flupentixol hydrochloride (2) on silica gel with methanol - chloroform - toluene 2:9:9 + 1 drop ammonia. Quantitative determination by absorbance measurement at 291 nm. The hRf value of compounds (1) and (2) were 53 and 34 and selectivity regarding matrix was given. Linearity was in the range of 1600-6400 ng/band and 80-320 ng/band for (1) and (2), respectively. Limit of detection was found to be 27 ng/band and 5 ng/band for (1) and (2), respectively. Limit of quantification was found to be 82 ng/band and 14 ng/band for (1) and (2), respectively. The intermediate/inter-day/intra-day precision was below 0.2 % for (1) and 1.1 % for (2) (n=3). Recovery (by standard addition) was between 99.1 and 101.8 % for both (1) and (2). The method showed comparable results with HPLC.