J. Planar Chromatogr. 31, 163-168 (2018). HPTLC bioautography of the essential oil in the bark of Ocotea quixos on silica gel with toluene – ethyl acetate – petroleum ether 97:7:20. After separation, the Mueller‒Hinton culture medium was deposited on the Petri dish which contained the chromatographic plate. The medium contained the selected microorganisms: 500 μL Bacillus subtilis ATCC 6633 ATCC and 500 μL P. aeruginosa ATCC 9027. The plate was incubated at 37 °C for 48 h. The molecule with activity proved to be cinnamyl acetate at an hRF value of 53.

germplasms from Western Himalayas. Pharmacogn. Mag. 14, 141-146 (2018). HPTLC of precocene I (1) and precocene II (2) in the germoplasms of Ageratum conyzoides on silica gel with toluene – ethyl acetate 49:1. Quantitative determination by absorbance measurement at 300 nm. The hRF values (1) and (2) were 60 and 23, respectively. Linearity was between 100 and 500 ng/zone for both (1) and (2). LOD and LOQ were 5 and 16 μg/mL for both (1) and (2). The intermediate precision was <5 % (n=3). Average recovery was 99.7 % for (1) and 102.9 % for (2).

J. Planar Chromatogr. 31, 421-428 (2018). HPTLC of solamargine in Solanum species on silica gel with dichloromethane ‒ methanol ‒ 2.5% aqueous ammonia 75:25:2. Detection by dipping into anisaldehyde sulfuric acid reagent, followed by heating at 110 °C. Quantitative determination by absorbance measurement at 540 nm. The hRF value for solamargine was 15. Linearity was between 25 and 300 ng/zone. LOD and LOQ were 1 and 4 ng/zone. The intermediate precision was <2 % (n=3). Average recovery was 101.2 %.

(Dryopteridaceae, pteridophyte). Helv. Chim. Acta 68, 1251-1274 (1985). TLC of various complex phloroglucinols on silica impregnated with citric acid - phosphate buffer using methanol - isopropyl ether - cyclohexane 10:35:55, chloroform - hexane - ethanol 45:45:10, chloroform - hexane - ethanol - acetic acid 45:35:16:4 or ethyl acetate - cyclohexane - acetic acid 60:35:5. Detection by UV 254 and 366 nm and by spraying with a 0.1 % sol. of "fast blue salt B". Checking of doubtful spots was achieved by scraping, elution with ethyl acetate/ether and rechromatography in another system.

J. Chinese Herb Med. 19, 185-187 (1988) (Zhongcaoyao). Review on the applications of planar chromatography in the study of plant medicines with 10 references.

Phytochemistry 31, 3909-3914 (1992). Comparative study of the triterpene patterns of seven sanguisorbeae species by TLC on silica with toluene - ethyl acetate - formic acid 8:2:1. Detection with anisaldehyde - sulfuric acid - water 18:1:1. Detection with anisaldehyde - sulfuric acid. Also PTLC using the same conditions. TLC is used as main tool in a chemotaxonomic study. Excellent conditions for the separation of closely related triterpenes.

rubescens. Planta med. 70, 269-272 (2004). Analytical and preparative TLC of i. a. xindonguin D and F, and melissoidesin G on silica gel with chloroform - methanol 7:1; 9:1; 10:1; 20:1 or cyclohexane - isopropanol 4:1 by 3-fold development, 8:1 or cyclohexane - diethyl ether 1:2. Visualization by spraying with 10 % sulfuric acid in ethanol followed by heating.

CBS 92, 13-15 (2004). HPTLC on silica gel with toluene - ethyl acetate - methanol - ammonia 25 % 10:10:50:3 over 70 mm with chamber saturation for 30 min. Detection by dipping in iodine solution (0.05 g in 10 mL ethanol 96 %). Visual evaluation under white light. Quantitative determination by absorbance measurement at 210 nm. Repeatability measuring 6 replicates of the same sample on one plate is between 1.6 % and 3.7 %, repeatability of the means from 3 different plates is 1.2 %.