J. Chromatogr. A 1458, 136–144, (2016). The soil-water partition coefficient normalized to the organic carbon content (KOC) influences the fate of organic compounds in the environment. This paper proposes a RP-TLC method for KOC determination as a simpler, yet equally accurate method as the official HPLC method. TLC on different systems, including RP-18 and cyano phases developed with methanol – water and acetonitrile – water mixtures. 50 different compounds such as phenols, benzodiazepines, triazine herbicides, and polyaromatic hydrocarbons were selected. A calibration set of 29 compounds with known logKOC values was used to build simple univariate calibrations, Principal Component Regression (PCR) and Partial Least Squares (PLS) models between logKOC and TLC retention parameters. The models exhibit good statistical performance and indicate that the cyano phase contributes better to logKOC modeling than the RP-18 phase. Comparison of the proposed TLC methods, the official HPLC method, and four in silico estimation approaches by using the non-parametric Sum of Ranking Differences(SRD) approach. The best estimations of logKOC values were achieved by simple univariate calibration of TLC retention data from cyano phase developed with 40–50 % methanol. In a Linear Solvation Energy Relationship study it was found that the more polar cyano phase in combination with methanol – water mixtures is the key to better modeling of logKOC through significant diminishing of dipolar and proton accepting influence of the mobile phase as well as enhancing molar refractivity in excess of the chromatographic systems.

Preparative TLC of fluoranthene and acenaphthene etc. on silica with n-hexane - petrol-ether and petrol-ether - dichloroethane 6:1. Detection by UV light or densitometry. Elution with THF. Discussion of the conditions.

Merck Spectrum 1991, 24-28. HPTLC of indenopyrene, benzofluoroanthene, benzopyrene, fluoroanthene, benzoperylene on silica (impregnated with 4 g caffeine in 96 g dichloromethane) at -20°C with dichloromethane as eluent. Quantification by in-situ fluorimetry.

J. Liquid Chromatogr. 17, 2821-2831 (1994). Use of 2-D TLC coupled to fluorescence analysis by CCD video camera for the study of complexes which contain at least one fluorescent component. Application of the method to the diphenylhexatriene ß-cyclodextrin complex in H2O/MeCN system enables the separation of free and bound DPH and an accurate estimation of their respective quantities on the plate. Evaluation of free DPH eluted with the hydrocarbon media by comparison of emitted fluorescence intensity with the linear 0 to 50 pmol calibration scale. Dissociation of DPH bound to BCD with a brief polarmigration followed by elution with a non polar solvent mixture and evaluated as above.

J. AOAC Int. 82, 117-230 (1999). Investigation of the effect of polymer nature and concentration of impregnating solution on retention factors and separation selectivity. TLC separation of C60 and C70 fullerenes on silica gel impregnated with polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP) and poly(ethylene oxide)(PEO) solutions with hexane. Detection under UV 254 and 366 nm. Results showed that PVA is a potential complex-forming agent for fullerenes.

J. Liq. Chromatogr. Relat. Technol. 28, 2479-2488 (2005). TLC of tetralin, anthracene, and phenanthrene on silica gel with n-hexane with chamber saturation for 20 min. Densitometry in reflectance mode at 254 nm. In the experiments the separation performance of TLC proved to be substantially better than that of OPLC.

J. Liq. Chromatogr. Relat. Technol. 37, 2846-2856 (2014). HPTLC fingerprinting of materials originated from cold surfaces of biomass fuel and fossils-fired home heating ovens, as well as truck exhaust systems and asphalt concrete samples on RP-18 with n-hexane. Fluorescence detection at UV 366 nm and absorbance detection (fluorescence inhibition) at UV 254 nm. The method can be used to identify wrong combustion parameters or unsuitable fuel.