J. Chromatogr. Sci. 38 (11), 512-514 (2000). TLC on berberine impregnated silica gel with hexane (9 min) and then with dichloromethane (4 min), or with hexane. Detection by densitometry. Investigation of the influence of sample load and developing time on the separation. Discussion of the possibility of using the method for separation and detection of gas oil for hydrocarbon - type determination.

Anal. Chem. 72, 1759-1766 (2000). TLC of n-alkanes on silica gel and on berberine sulfate and 2,4,5,7-tetranitro-9-fluorenone impregnated silica gel (impregnation with a methanolic solution of 2 - 6 mg/100 ml of the corresponding compound for 20 s). Developed with n-hexane. Detection by densitometry at 365 nm. - An ion - molecule interaction between alkanes and berberine sulfate is considered as being responsible for the enhancement of fluorescence produced by alkanes.

J. Liq. Chromatogr. Relat. Technol. 41, 315-323 (2018). HPTLC of three types of macrocyclic compounds, i.e. (1) cyclodextrins, (2) calixarenes and (3) macrocyclic antibiotics, on silica gel or RP-18 with different compositions of water – organic liquids (methanol, ethanol, acetonitrile). Detection of (1) on silica gel with a 1:1 mixture of 10 % α-naphthol in ethanol and 10 % sulfuric acid in water, followed by heating at 120 °C for 5-10 min; and on RP18 W by spraying with a 25 % methanolic solution of sulfuric acid, followed by heating at 120 °C for 5-10 min. Detection of (2) by spraying with 20 % aqueous solution of perchloric acid, followed by heating at 120 °C for 5 min. A comprehensive retention data set was obtained for fast selection of mobile phase compositions.

Anal. Chem. 60, 564-508 (1988). TLC of phenanthrene, naphthalene, fluoranthene, triphenylene on silica with n-hexane. Visualization under UV after submerging in liquid nitrogen.

J. Planar Chromatogr. 3, 24-33 (1990). Method for the estimation of partition coefficients of both neutral and basic PAH. RP-TLC of 63 compounds on C-18 and KC 18-bonded silica with mixtures of methanol – deionized water or methanol – 0.063 M phosphate buffer (pH = 7). RM data may be predicted from structural descriptors, such as molecular connectivities and calculated partition coefficients.

Dünnschicht-Chromatographie InCom Sonderband 1996, 157-165. HPTLC of benzo[g,h,i]perylene, indeno[1,2,3]pyrene, benzo[a]pyrene, benzo[b]fluoroanthene, benzo[k]fluoroanthene and fluoroanthene on caffeine-impregnated silica prewashed with dichloromethane, precooled for 30 min at -20 °C, with dichloromethane at -20 °C. After removal of the eluent the plates are dipped for 2 s into a solution of paraffin (low viscosity)/n-hexane 1:2 and dried again (for stabilization and intensification of the inherent fluorescence of the PAH). Quantification by densitometry.

Sz. Nyiredy, A. Kakuk (eds.): Planar Chromatography 2000, Lillafüred, Hungary, 24-26 June 2000, Res. Inst. for Med. Plants, p. 11-18. HPTLC of 45 aromatics with polar groups on RP18 and RP18 W with various binary solvent systems. One mobile phase component was water and the organic one was 70% methanol, 55% acetonitrile or 55% tetrahydrofuran. The smallest selectivity changes are observed between methanol and acetonitrile systems. Distinctive selectivity changes are caused by modifiers. Ternary solvent systems seem to be advantageous for fine tuning of the separation.

Anal. Chem. 56, 1277-1281 (1984). TLC for chemical class fractionation on silica with 1) pentane for nonpolar compounds and 2) ether - pentane 1:5 for the polar. Detection by spraying with 0.2 % 2,7-dichloro-fluorescein solution and irradiation with UV light. Compound identification by GC/MS and IR.