J. Planar Chromatogr. 5, 458-462 (1992). TLC of the contamination of copolymers with carbohydrates, their derivatives, with furfural and maleic acids on silica with propanol - ethyl acetate - water 7:2:1; of contamination with terpenes and dioxane derivatives on aluminium oxide with benzene - hexane - ethanol 25:25:1 or on silica with cyclohexane - toluene - MEK 40:5:4. TLC of copolymers on RP-18 silica with methanol - water 5:1. Visualization with 7 different dyeing reagents. This TLC method is useful for checking the purity of the maleic anhydride copolymers either during synthesis of prior to their medical application.

J. Planar Chromatogr. 6, 413-415 (1993). TLC of nitroaromates and carbazoles (9-nitroanthracene, 1-nitronaphthalene, 2-nitrofluorene, 1-nitropyrene, carbazole, 1,2,7,8-dibenzcarbazole, 1,3-dinitropyrene, 2,7-dinitrofluorene) on silica with hexane - dichloromethane 1:1. Detection under UV 254 and 365 nm, followed by spraying with freshly prepared reducing agent (0.1 g sodium borohydride) dissolved in a mixture of 15 mL methanol, 3 mL water, and 1 mL of 0.05% copper(II)chloride solution and again observation under UV at 365 nm. Azaarenes were separated on cellulose with DMF - water 1:4. Detection by observation under UV both before and after reaction in a chamber containing trifluoroacetic acid fumes.

Glycoconjugate J. 10, 337 (1993). Improved HPTLC of gangliosides by threefold automatic development (AMD) with chloroform - methanol - water 120:85:20, of highly complex monosialoganglioside mixtures with chloroform - methanol - water 120:85:12, of disialoganglioside fraction of YAC-1 with chloroform - methanol - water 120:85:16. Excellent separation of polysialogangliosides (containing up to six sialic acids) isolated from embryonic chicken brain, with chloroform - methanol - water 120:85:22. All solvents contained 2 mM CaCl2. The described technique offers a suitable tool for analytical as well as preparative TLC.

Biochemical Systematics and Ecology 21, 421-429 (1993). Two-dimensional TLC of vitexin on silica with butanol - acetone - water 4:1:5 in the first direction and 50% acetic acid in the second. Visualization under UV after spraying with NH3. TLC of rutin (vitamin P) on silica with same solvents.

J. Planar Chromatogr. 7, 70-72 (1994). Preparative TLC of flavonones (i.a. apigenin 7-O-a-rhamnoglucoside, naringenin 7-O-a-neohesperidoside, isokuranetin 7-O-a-neohesperidoside) on polyamide with nitromethane - methanol 1:1 and on silica with ethyl acetate - pyridine - water - methanol 80:20:10:5. Observation under UV 254 and 366 nm both before, of a pilot strip, and after treatment with 1. ethanolic 1% AlCl3 solution and 2. a solution of sodium borohydride 1% in isopropanol, followed by a solution of AlCl3, 5% in ethanol, and heating at 120 °C for 1.5 min.

Chinese J. Pharm. Anal. (Yaowu Fenxi Zazhi) 14, 5 (1994). TLC on silica with chloroform - methanol - NH3 1:1:1. Detection by spraying with 0.5% ninhydrin. Identification by comparison with standards.

J. Planar Chromatogr. 7, 180-196 (1994). Review with 137 references for the application of TLC in coal and petroleum analysis. Brief detail (layer, solvents, detection method and reference number) for the separation of soil-, sediment-, coal- and petroleum-derived samples are given in three tables.

Biochemical Systematics and Ecology 22, 25-29, (1994). TLC separation of 3-hydroxyechinenone from canthaxanthin on silica with chloroform - ether 8:2 and of zeaxanthin from lutin with 1) chloroform - ethyl ether 8:2 and 2) with chloroform - tetrahydrofuran 8:2.