J. Chromatogr. Sci 37, 41-44 (1999). Determination of Rf values of 25 2-cyclo-3-methyl-thio-3-substituted amine-acrylates on RP-18 with methanol - water mixtures. Establishment of the relationship between Rm value and partition coefficients. Evaluation of the lipophilicity of the compounds using the Rmo value.

J. Planar Chromatogr. 15, 177-182 (2002). HPTLC of 12 fatty acids, hydroxy fatty acids and methyl esters (oleic acid, elaidic acid, palmitic acid, stearic acid, ricinoleic acid, methyl ricinoleate, a-hydroxypalmitic acid, methyl a-hydroxypalmitate, 12-hydroxystearic acid, methyl 12-hydroxystearate, 9,10-dihydroxystearic acid, methyl 9,10-dihydroxystearate) on RP-18 with methanol and methanol - water 19:1 and 9:1. previously saturated for 30 min. Visualization by exposure to iodine vapor. The most accurate prediction of the RM values of the acids and esters, for all the mobile phases investigated, was achieved by use of four-parameter equations relating the dipole moments of the mobile phases to three other parameters.

J. Liq. Chromatogr. Relat. Technol. 28, 907-922 (2005). HPTLC of eight pairs of ortho and para substituted phenols and anilines on amino, diol, and cyano phase, with chamber saturation for 15 min, with nonaqueous eluents consisting of n-heptane and polar modifier (tetrahydrofuran, ethyl acetate, or 2-propanol), or on cyano phase in RP systems with aqueous solutions of methanol or acetonitrile. Evaluation under UV 254 nm.

J. Planar Chromatogr. 3, 417-421 (1990). Retention versus eluent composition relationships of 36 drugs and poisons have been determined using silica gel and 20 binary eluents - mixtures of four weakly polar diluents (heptane, chloroform, dichloromethane, and trichloroethylene) and four polar modifiers (MEK, ethyl acetate, ether, diisopropyl ether) or mixtures of the four polar modifiers with methanol. In accordance with the Snyder-Soczewinski model of adsorption, linear relationships of the type RM = RM - m log cmod were obtained in almost all cases.

Chromatographia 35, 102-108 (1993). Study of the optimization of TLC parameters. Comparison of the window diagram and overlapping resolution map methods. Use of the latter to take into account the spot diameter and the average plate height variations with the development distance, in order to improve the reliability of the method.

J. Planar Chromatogr. 8, 319-323 (1995). Application of a test mixture (thymol blue, methyl red, bromothymol blue, oracet blue) on silica with an automatic TLC sampler. Followed by radial development with a selection of solvents also delivered by the automatic TLC sampler. Chromatograms can be obtained by densitometry. Inspection enables selection of the approximate solvent strength (Snyder’s solvent classification table) for the separation. The results indicate which solvent group has the required selectivity. So a suitable solvent system can generally be determined in two to three methodical steps. Rapid, cost-effective method requiring minimal solvent and sample consumption.

J. Liq. Chrom. & Rel. Technol. 22, 15-27 (1999). Investigation of the dependence between retention of five different test solutes and the mobile phase composition in TLC systems with 3-cyanopropyl modified silica gel and binary 2-propanol - n-hexane eluents; calculation of regression parameters and conclusions regarding efficiency of the retention models.

J. Planar Chromatogr. 28, 223-228 (2015). HPTLC of beta-amyrin in the leaves of five different Ficus species (F. carica, F. nitida, F. ingens, F. palmata and F. vasta) on silica gel with toluene - methanol 9:1. Detection with p-anisaldehyde reagent followed by heating. Quantitative determination by absorbance measurement at 550 nm. Precisions (intra- and inter-day) were 1.6-1.8 % and 1.7-1.8 % respectively (n=6). The hRF value was 58. Linearity was between 100 and 900 ng/zone. The LOD and LOQ were 32 ng and 96 ng/zone, respectively. Recoveries were 97.6-98.3 %.