J. Liq. Chromatogr. Relat. Technol. 32, 2437-2450 (2009). HPTLC calliterpenone (1) and calliterpenone monoacetate (2) in the leaves of Callicarpa macrophylla on silica gel with methanol - water 9:11. Quantitative determination by absorbance measurement at 210 nm. The hRf values of (1) and (2) were 43 and 73, respectively. Linearity was between 1-5 µg/zone for (1) and (2). LOD and LOQ were 230 and 780 ng/zone for (1) and 220 and 730 ng/zone for (2). Intra-day and inter-day precisions ranged between 1.3-1.7 % for (1) and 1.1-1.7 % for (2). Recoveries (by standard addition) were between 97.5-100.8 % for both.

J. Planar Chromatogr. 25, 403-408 (2012). HPTLC of rosmarinic acid in Salvia species on silica gel with ethyl acetate - toluene - formic acid 6:3:1. Quantitative determination by absorbance measurement at 328 nm. The hRf value of rosmarinic acid was 42. Linearity was in the range of 200-1000 ng. The coefficient of variation (%) of intra-day and inter-day precision were 1.4 and 4.5, respectively (n=9). Recovery (by standard addition) was between 82.3 and 85.9 %.

J. Liq. Chromatogr. Relat. Technol. 35, 484-498 (2012). HPTLC of vitamin K homologues including phylloquinone (1), menaquinone-4 (2), and menaquinone-7 (3) on silica gel with methanol - ethanol - isopropanol - water 15:1:1:3. Quantitative determination by absorbance measurement at 254 nm. The hRf values of compounds (1) to (3) were 56, 43 and 23, respectively. Linearity was in the range of 1-200 ng/band. Limits of detection and quantification were in the range of 0.2-0.9 and 0.7-2.5 ng/band, respectively. The intermediate/inter-day/intra-day precisions for (1) to (3) were in the range of 0.5-1.3 % (n=5). Recoveries were ranged from 95.3 to 100.8 %.

J. Planar Chromatogr. 25, 415-419 (2012). HPTLC of apigenin (1), quercetin (2), hyperoside (3), vitexin (4) and vitexin-2”-O-rhamnoside (5) on silica gel with acetonitrile - methanol - water 1:1:2 + 1 drop formic acid. Quantitative determination by absorbance measurement at 254 nm. The hRf of (1) to (5) were 12, 20, 48, 53 and 59, respectively. Linearity was in the range of 400-1250 ng/zone for (1) and (2) and 800-2500 ng/zone for (3) to (5). Limits of detection and quantification were 100 and 310 ng/zone for (1), 200 and 630 ng/zone for (2) and (3) and 300 and 960 ng/zone for (4) and (5), respectively, The intermediate/inter-day/intra-day precision was below 2.2 % (n=3). Recovery for all (1) to (5) was between 97.1 and 100.2 %.

J. Ethnopharmacol. 138, 286-313 (2011). The review covers literature across from 1980 to 2011. HPTLC studies of Phyllanthus amarus such as fingerprint profiles and detection of phyllanthin and hypophyllanthin as marker components were reviewed. Comparative results with HPLC were also described.

J. Planar Chromatogr. 25, 81-84 (2012). HPTLC of atorvastatin (1) and ezetimibe (2) on silica gel with methanol - toluene - chloroform - triethylamine 2:16:1:1. Quantitative determination by absorbance measurement at 259 nm. The hRf values of compounds (1) and (2) were 7 and 37, respectively. Linearity was in the range of 500-1500 ng/band for both (1) and (2). Intermediate/inter-day/intra-day precision was below 2 % (n=3). Mean recovery was 99.7 % for both active agents.

J. Chromatogr. A 1272, 132-135 (2013). Honey is a saturated solution of sugars, used for a long time as a natural source of sugars and is an important ingredient in traditional medicine due to its antimicrobial, anti-inflammatory and antioxidant effects. For quality control and detection of adulteration, TLC of (1) glucose, (2) fructose and (3) sucrose on silica gel aluminum foil twice with ethyl acetate – pyridine – water – acetic acid 12:6:2:1 up to 80 mm. Detection in visible light after dipping in diphenylamine - aniline reagent (2 mg diphenylamine and 2 mg aniline HCl were dissolved in 80 mL acetone, 15 mL phosphoric acid were added and the solution was diluted to 100 mL with acetone) and drying at 110 °C for 15 min. The hRf value of (1) was 46, (2) 52 and (3) 39. Linearity was between 6-16 µg/zone for (1)-(3). Repeatability and intermediate precision (%RSD, n=6) for (1), (2), and (3) was 1.2, 1.3, and 1.1 % and 0.1, 1.3, and 1.1 %, respectively. Recovery (by standard addition) was between 100.7 and 102.1 % for all three substances.

J. Planar Chromatogr. 25, 168-173 (2012). HPTLC of arbutin in commercial whitening creams with methanol - chloroform - acetic acid 7:12:1. Quantitative determination by absorbance measurement at 254 nm. The hRf value of arbutin was 40. LOD and LOQ were found to be 42 and 112 ng/zone, respectively.