J. Sep. Sci. 46, 2300198 (2023). HPTLC of asphaltenes-containing petroleum materials: saturated, aromatics, resins, asphaltenes group-type composition on silica-coated quartz rods with a reverse order of the subsequent elution steps, where the solvent polarity was simultaneously reduced and the chromatogram development distance increased in the following order: dichloromethane - methanol 19:1, 3 cm; toluene, 6 cm; and n-hexane, 10 cm. After each development step, the frame was placed in an oven at 70 °C until completely dried and placed in a desiccator for 10 min. Chromatograms were obtained based on the electrometer analog signal generated during the mechanical movement of individual rods in the air-hydrogen flame of the TLC–FID analyzer. 

J. AOAC Int. 100, 922-934 (2017). HPTLC of monoacylglycerol, diacylglycerol, triacylglycerol, and glycerol in lubricating oils applied in cutting devices on silica gel in a three-step elution carried out toward increasing strength of the mobile phase: the elution up to 100 % of the plate’s height in n-hexane; step 2: the elution up to 60 % of the plate’s height in toluene; and step 3: the elution up to 30 % of the plate’s height in dichloromethane - methanol 19:1. Detection by exposure to iodine vapor and under UV light at 254 and 366 nm. Further analysis by coupling with a flame ionization detector.

Chinese J Oil Refining & Chem. Ind. 32 (6), 70-72 (2021). The output of coal tar accounts for about 3-4 % of the coal quantity in the furnace, which mainly contains benzene, toluene, xylene, naphthalene, anthracene and other components, and can be refined into phenolic oil, anthracene oil, asphalt and other products. These are widely used in dyes, medicine, spices, pesticides and other industries. Presentation of a method by using rod chromatography (rod TLC) / FID under optimized experimental conditions: TLC of 0.04 g/mL coal tar on activated chrombars under constant humidity conditions were developed in turn (A) with heptane to 11 cm, (B) with toluene to 6.5 cm and (C) with dichloromethane to 4.0 cm. The chrombars were scanned by FID and the content of saturated hydrocarbons, aromatic hydrocarbons, glia and bitumen was calculated by referring to the correction factors used in the determination of the four components in decompression slag oil. The method has been applied to four batches of coal tar samples or coal tar intermediate products produced by different process with satisfactory results, and proved to be simple, fast, economically feasible and suitable for coal chemical enterprises to quickly detect the change of coal tar composition, and to provide data reference for adjusting the device process parameters.

Chemosphere. 233, 936-945 (2019). HPTLC of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in marine sediments on silica gel with n-hexane - dichloromethane - toluene 14:5:1. Qualitative identification using the wavelengths 190-310  nm. Toxicological potential of the sediment samples was determined by the intrinsic fluorescence of Aliivibrio fischeri by dipping into the bacteria solution and analysis with a BioLuminizer. 

J. Agric. Food Chem. 33, 95-98 (1985). TLC determination of 4-chlorobenzotrichloride and metabolites on silica with hexane - ethyl acetate - acetic acid 2:1:0.1, hexane - acetic acid 10:1, hexane - ether 5:1 and hexane.

J. Agric. Food Chem. 34, 429-433 (1986). TLC separation of wax classes (alkanes, aldehydes, alcohols and acids) on silica with CCl4, CHCl3, CHCl3 - EtOH 99:1, CHCl3 - EtOH - acetic acid 98:1:l. Detection by spraying with 3 % CrO3 in sulfuric acid, followed by charring at 120 °C; detection of diketones by UV 254 nm or with spraying with 1 % aqueous Fast Blue solution, of aldehydes by spraying with 1 % aqueous solution of purpald.

Chromatographia 23, 179-183 (1987). TLC on silica with n-hexane - benzene 9:1 and chloroform - ether 9:1. Detection under UV 254 nm and 366 nm. Use of TLC data for establishing the sequence, composition and volume of eluents in order to collect the main components of coal liquids in six fractions of increasing polarity.

J. Chromatogr. 580, 257-278 (1992). Discussion of methods for the analysis of persistent chlorinated hydrocarbons in tissues using TLC as an extract clean-up means.