J. Planar Chromatogr. 21, 197-198 (2008). TLC of endosulfan on silica gel with n-hexane - acetone 4:1 in a saturated twin-trough chamber. Detection by spraying with 5 % aqueous sodium hydroxide solution followed by heating for 5 min. The air-cooled plate was then sprayed with a 2 % solution of m-dinitrobenzene in dimethyl sulfoxide. The limit of detection was 5 µg.

J. Planar Chromatogr. 22, 333-343 (2009). TLC of brodifacoum, bromadiolone, coumateralyl and impurities on silica gel, alumina, cellulose, and RP-18 with 46 different mobile phases in a twin trough chamber saturated for 30 min. The most selective phases on silica gel were chloroform - ethyl acetate - n-hexane in various ratios, ethyl methylketone- toluene 1:9, and chloroform - toluene 7:3; on alumina the best mobile phase was dichloromethane - n-hexane 3:2. Detection under UV light at 254 nm.

J. Planar Chromatogr. 24, 545-546 (2011). TLC of carbosulfan and other commonly available carbamate pesticides, organochlorine pesticides, organophosphorus pesticides, synthetic pyrethoids and extracts from biological tissues on silica gel with toluene - acetone 9:1 with chamber saturation for 30 min. Detection by spraying with 10 % sodium hydroxide solution followed by 4-aminoantipyrine reagent and then with potassium hexacyanoferrate(III) reagent. The red-colored zone for carbosulfan was observed immediately. Carbaryl, propoxur, and carbofuran form a red-colored zone at the hRf values of 52, 45, and 48, respectively, whereas the hRf value of carbosulfan was 94.

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. Planar Chromatogr. 27, 416-419 (2014). HPTLC of (1) cotinine and (2) trans-3'-hydroxycotinine in urine on RP-18 with acetonitrile - water 4:1. Quantitative determination by absorbance measurement at 260 nm. Linearity was in the range of 65-325 ng/zone (at a low calibration range) and 325-1300 ng/zone (at a high calibration range) for (1) and 62.5-312.5 and 312.5-1250 ng/zone for (2). The intermediate precisions were below 9 % (n=3). The LOD and LOQ were 13 and 38 ng/zone for (1) and 17 and 50 ng/zone for (2), respectively.

Planta Med. 83, 1097-1102 (2017). The fractionations on a silica gel column (with a gradient of ethyl acetate, methanol and petroleum ether/dichloromethane) of the dichloromethane and methanol extracts of Antidesma ghaesembilla bark were monitored by TLC on silica gel with chloroform – methanol – water – formic acid 290:20:1:1 or 290:50:1:1, respectively. From fractions of the dichloromethane extract, chavibetol, sitostenone, asperphenamate, daucosterol, 5,7-dimethoxy-aristolochic acid II and 10-amino-5,7-dimethoxy-aristolic acid II were later isolated, the last one was detected by Dragendorff reagent. From fractions of the methanol extract, glucosides of aristolic acid and of vanillic acid were isolated and separated by preparative TLC with chloroform – methanol – acetone – formic acid 450:75:25:2. This preparative TLC yielded protocatechuic acid (hRF 51) and a mixture (hRF 14–19), from which a methyl-phloroglucinol glucoside was isolated by gel exclusion chromatography.

J. Liquid Chromatogr. 8, 1265-1278 (1985). Separation of seven barbiturates on silica impregnated with 2 % copper sulfate or 2 % ethylene diamine with benzene - methanol 40:8 or benzene - acetone 40:12. Detection by spraying with 1 % aq. solution of mercurous nitrate.

J. Agric. Food Chem. 34, 738-742 (1986). TLC determination of fatty acid anilides on silica with hexane - ethyl acetate 3:1. Visualization by spraying with 10 % methanolic sulfuric acid.