(Russian). Firm laboratory. Evaluation of materials 12 (70), 3-13 (2004). The state of the art and the historical development of EO-TLC is described. Determination of polysaccharides, steroids, colorants, pirimicarb and its analogs (with additional methyl, methoxy and carbamate groups) on silica gel with ethanol or RP18 with water - ethanol 1:4, water- acetonitril 11:9. Frequently used voltages are in the range of 1 - 0,1 kV/cm. Detection of polysaccharides with potassium-iodine reagent. Monitoring of electro-osmotic flow by fluorescence detection (addition of pyrene into mobile phase) or in the vis range (addition of ß-carotene into mobile phase).

J. Planar Chromatogr. 23, 415-419 (2010). The paper summarizes the classification and applicability of centrifugal layer chromatography and rotation planar chromatography (RPC). The combination of TLC with centrifugal force resulted in the introduction of centrifugal layer chromatography which was renamed rotation planar chromatography because the abbreviation CLC had been used for column liquid chromatography. In analytical RPC three development modes are possible - circular, anticircular, and linear. On-line and off-line sample application, separation, and detection can be combined. RPC is suitable for analytical, micro-preparative, and preparative separations. The term RPC covers five basic techniques: normal chamber, micro-chamber, ultra-micro chamber, column and sequential RPC. Most RPC methods are applicable to preparative separation of a single sample. Analytical RPC is rarely used.

J. Planar Chromatogr. 29, 30-37 (2016). HPTLC and pressurized planar electrochromatography (PPEC) of 20 amino acids on silica gel with acetonitrile – buffer pH 3.2 (citric acid – disodium hydrogen phosphate 2.28:1.44) 1:1 for HPTLC and acetonitrile – buffer pH 3.2 4:1 for PPEC. PPEC separation was performed at a polarization voltage of 1.0 kV for 25 min. Detection by spraying with ninhydrin solution, followed by heating in a warm air stream.

J. Chromatogr. A 1530, 211-218 (2017). Development of a novel and cost-effective TLC method on cellulose (instead of silica gel) for authentication of selected fruit-based alimentary products. As authenticity markers the anthocyanins cyanin chloride, keracyanin chloride, pelargonidin chloride and delphinidin chloride were used. With TLC, the LOD and LOQ for cyanin were of 25 and 75 ng/zone, for keracyanin 55 and 166 ng/zone, for pelargonidin 47 and 140 ng/zone, and for delphinidin 171 and 513 ng/zone. With HPTLC the LOD and LOQ for cyanidin were 107 and 321 ng/zone, for keracyanin 189 and 566 ng/zone, and for pelargonidin 161 and 484 ng/zone (delphinidin was not detectable). Consequently, quantification of anthocyanes in the alimentary products by TLC allowed identification of more target compounds and in a higher number of alimentary products than by HPTLC. (Note that original HPTLC method in J Chromatogr A 1299 (2013) 105-118 was reported to be more sensitive (mainly 3-50 ng/zone) and with higher correlation coefficients of calibration curves (0.9993-0.9999) for 11 anthocyanins/-cyanidins than the HPTLC method that was reproduced in this paper.)

Hungarian Sci. Instruments 59, 1-10 (1985).

Investigation of chromatographic behaviours. Rf values found dependent on the concentrations of the two components in mobile phase, and type of stationary phase, as well as the structures and size of the individual molecules.

Amer. Lab. 20, 66-73 (1988). Discussion of the principle of AMD TLC. Description of the design and function of a fully automatic machine for the complete process. Presentation and discussion of several examples for the separation of compounds differing widely in their polarity, by employing universal elution gradient.

Phytochemistry 29, 357-358 (1990). Isolation of new norditerpenoid alkaloids from an ethanol extract of roots of Delphinium tatsienense by centrifugal TLC on silica (layer thickness 1 mm) with diethyl ether - 75% methanol - 0.3% diethylamine, followed by preparative TLC on silica with diethyl ether - 5% methanol. Also vacuum liquid chromatography on aluminium oxide.