J. Agric. Food Chem. 39, 351-355 (1991). TLC of antioxidants (a,ß,d-tocopherols, ferulic acid, catechol) on silica with toluene - methyl formate - formic acids 5:4:1, toluene - chloroform - acetone 8:5:7 and benzene - pyridine - formic acid 36:9:5. Detection with Folin-Ciocaltau’s phenol reagent; anisaldehyde - sulfuric acid ; 0.5% fast blue.

(Identification and quantification of propyl, octyl, and dodecyl gallates in olive oils and butters by thin layer chromatography.) Trav. Chim. Aliment. Hyg. 89, 355-368 (1998). TLC of gallates on acetylcellulose with toluene - isopropanol - acetic acid - formic acid 15:2:1:2 or on silica gel with petroleum ether - benzene - acetic acid 2: 2:1. TLC of butylhydroxyanisole and butylhydroxytoluene on silica gel with petroleum ether - ethyl acetate 10:1. Visualization with 1% ethanolic iron(III)chloride solution. Densitometry at 580 nm.

J. High Resol. Chromatogr. 7, 635-636 (1984). Separation of methylated beta-cyclodextrins on silica, impregnated with 5 % solution of paraffin oil in hexane, with various eluents. Detection by anthrone reagent.

J. Planar Chromatogr. 3, 537-538 (1990). TLC of samples of hot rubber-bitumen products rubberised bitumen emulsions of silica with heptane - toluene 1:9, followed by visual evaluation

J. Planar Chromatogr. 12, 340-344 (2000). Improved TLC method TLC of styrene oligomers with peak molecular weights (Mp) 400, 700, and 900 Da (incl. their trimers, tetramers, pentamers etc.up to the dodecamers) on silica gel with n-heptane - toluene 3:1. Also OPLC on TLC and HPTLC layers. Detection by measuring the optical density at 260 nm.

Talanta 34, 167-174 (1987). 1-dimensional TLC of blockcopolymers on silica with 1) benzene, 2) chloroform - MEK 6:3 or 6:1, 3) cyclohexane - toluene 7:3 or 7:5, 2-dimensional TLC with benzene and chloroform - methanol 97:3. Detection by spraying with 1) 3 % KMnO4 in concentrated H2SO4 and heating at 180 °C for 5-10 min. 2) modified Dragendorff reagent, 3) 10 % KOH and heating at 150 °C for 10-15 min.

Chinese J. Chromatogr. (Sepu) 17, 604-605 (1999). TLC on silica gel with ethyl acetate - petroleum ether (60-90°C) 1:8. Detection under UV 254 nm. Quantitation by densitometry at 270 nm. Detection limit 0.1 mg.

Chinese J. of Jiangxi Agr. Sci. 25 (5), 117-119 (2013). Meat ducks used to be unhaired by employing certain safe depilating agents, however, a hot liquid composed of rosin and paraffin has found to be illegally applied by dipping into the hot liquid, so as to glue the liquid rosin closely onto the duck epidermis, and then by peeling the depilating agent after cooling. In this process some rosin components, such as abietic acid, may remain in the duck epidermis and even permeate the duck meat, which may be harmful to humans if daily intake exceeds 1 mg/kg body weight. Description of a procedure for testing colophony residues in the epidermis of meat ducks unhaired with rosin. TLC of the sample extracts (prepared by SPE), the standard abietic acid and depilating agent components (food grade wax and rosin glycerol ester), on silica gel with petroleum ether (60-90 °C) – ethyl acetate – glacial acetic acid 90:10:1, detection by spraying with 5 % sulfuric acid in ethanol and heating at 85 °C until the zones are visible in daylight. The LOD of abietic acid was 0.04 g/L. The method was successfully applied to the analysis of samples obtained from meat ducks unhaired with the depilating agents A) rosin - food grade wax 29:20, and B) food grade rosin glycerol ester – food grade wax 29:20, in the production conditions simulating a livestock and poultry processing enterprise.