International Journal of Molecular Sciences 3(7), 755-763 (2002). The introduction reviews in details the history of the Rm value, which means log(1/Rf – 1), and of its use to calculate the partition coefficient. For 10 aminoalkanethiosulfuric acids, 8 mercaptoalkanamines and 3 aminoalkyl disulfides, Rf and Rm values were determined by reverse phase TLC on silica gel (previously dessicated and impregnated with octanol – chloroform 1:19), with binary mixtures of methanol and 0.2 M ammonium acetate buffer pH 6.0 in different proportions. Detection by exposure to iodine vapor. Rm values were extrapolated to 100 % water, which was compared to the log P values obtained with the shake-flask method and with theoretical calculations.

Planta Medica 82(11/12), 1009-1015 (2016). _x000D_
To check the purity of six alkaloids isolated from fractions of a methanolic extract of Carapichea ipecacuanha, TLC on silica gel with dichloromethane – methanol – 25 % ammonia 186:13:1, detection with Dragendorffʼs reagent. By TLC comparison with standards (and confirmation by HPLC-MS), emetine (found to be a strong hERG potassium channel blocker) and N-methylemetine were identified._x000D_

Planta Med. 82(18), 1584-1590 (2016). The fractionation (on RP-18 by MPLC), after partition with butanol – water, of a methanol extract of the subterranean parts of Allium fistulosum was monitored through TLC on silica gel with n-butanol – acetic acid – water 12:3:5. Furostanol saponins (including fistulosaponins G-J and ascalonicoside A) were detected with cerium sulphate (in sulfuric acid, 1 M) reagent._x000D_
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Planta Med. 83, 1011-1019 (2017). The subfractionation on silica gel column of a diethyl ether fraction of a hydromethanolic extract of Lamium album aerial parts was controlled by TLC on silica gel with ethyl acetate – formic acid – water 20:2:3. Detection was performed at UV light after derivatization with 1 % Natural Product Reagent A. From the last subfraction, caffeic acid and tiliroside were isolated. The same TLC monitoring was applied for the fractionation of the butanol fraction of the extract. Some fractions and their subfractions were purified on dextran gel (Sephadex LH-20), and monitored by TLC on silica gel with ethyl acetate – formic acid – acetic acid – water 100:11:11:26, with the same detection. These subfractions contained caryoptoside and other iridoids, glucomartynoside, lamiusides and other phenylpropanoid derivatives.

J. Planar Chromatogr. 3, 500-503 (1990). Descrip-tion of two devices for contact transfer of derivatization reagents using pressure (OPD = “overpressure derivatization”). Influence of the derivatization technique on background noise and linearity was studied. The results obtained tend to prove that OPD is a suitable postchromatographic derivatization method, comparable with spraying and dipping. Densitometric measurements and calibration curves obtained from the method are comparable with those obtained by direct UV detection.

J. Planar Chromatogr. 3, 275-276 (1990). Evaluation of “useful” reagents for the detection of amino acids. TLC of 22 amino acids on silica with propanol - water 7:3. Detection by spraying with 0.2% solution of 1,3-indanedione in 0.1 M sodium hydroxide - ethanol 1:1 of 1% o-mercaptobenzoic acid in 1 M aqueous sodium hydroxide - ethanol 1:1. Detection limits 0.05 - 0.4 µg.

J. Planar Chromatogr. 5, 45-49 (1992). HPTLC of phospholipids (distearoylphospatidylglycerol, -lecithin, -ethanolamine, -ethanolmaleimidocaproate, cholesterol) on silica with chloroform – methanol 12:4. Detection with cupric sulfate – phosphoric acid reagent (20 g cupric sulfate pentahydrate in phosphoric acid (8%, 200 mL). Quantification by densitometry (absorbance at 290 nm).

Magyar Kémiai Folyoirat 98, 115-116 (1992). TLC of three diasterioisomeric 2,3-o-isopropylidene tartaldehyde dithioacetals from monosaccarides on silica with hexane – ethyl acetate 7:3 or 9:1, chloroform – methanol 9:1 or 10:1, hexane – ether – ethyl acetate 30:3:1, dichloromethane – methanol 93:7. Visualization under UV 254 nm and by spraying with various spray reagents.