J. of Chromatogr. A 1258, 94-100 (2012). Study of seven angiotensin-converting enzyme (ACE) inhibitors (enalapril, quinapril, fosinopril, lisinopril, cilazapril, ramipril, benazepril) to evaluate the correlation between their absorption and UHPLC–MS and RP-TLC hydrophobicity data (f0 or C0 parameters, respectively). Their absorption values were in the range of 25–60 % and calculated KOWWIN logP values ranged from -0.94 to 6.61. In order to obtain reliable correlation (r2 = 0.7208) between absorption and ACE inhibitors lipophilicity the solubility data (logS) must be considered, as independent variable, simultaneously with KOWWIN logP. Study of the relationships between literature available and absorption data predicted by multiple linear regression (MLR) using logS values besides chromatographically obtained hydrophobicity parameters C0 (r2 = 0.6424) or f0 (r2 = 0.6762) indicates that these parameters could be used in ACE inhibitors absorption evaluation. The UHPLC–MS method provides the direct application of experimentally obtained f0 values. Mathematical conversion of C0 parameters to logC0 values was necessary based on requisite for probability value of regression analysis (P < 0.05) for better MLR correlation of ACE inhibitors absorption with C0 parameters (RP-TLC) and logS. Definition of the accordance and differences between hydrophobicity parameters obtained by UHPLC–MS and RP-TLC.

Chromatographia 18, 37-40 (1984). The effects of different binary solvents on the retsntion behaviour of some steroids in TLC on alumina were studied. The slope of the linear relationship between the retention constant of the steroid and the logarithm of the volume fraction of the polar component in the binary solvent mixture depends predominantly on the diluent. Linear relationships between the axis intercepts and slopes of particular steroids exists for all chromatographic systems examined. TLC on alumina with different solvents, e.g. cyclohexane, benzene, chloroform or ether, ethyl acetate, MEK, etc.

J. Chromatogr. 290, 75-81 (1984). Method for constructing overlapping resolution maps for thin-layer chromatography. The axes of the maps are time, length and binary solvent composition. These maps can be used to identify sets of compounds within a mixture such that each set is fully separated under appropriate conditions. The separation of a mixture of fifteen steroids is described.

J. Planar Chromatogr. 2, 95-98 (1989). Theoretical aspects of migration are described.

Chromatographia 42, 675-679 (1996). Verification of the hypothesis that in salting-out planar chromatography there is a linear dependence between the pair of RM values of substances obtained on one or two sorbents using the same series of aqueous ammonium sulfate solution-RM proportionality between the distance of the individual points on the regression straight line and the difference in mol% of the salt in the corresponding solvent - proportionality rule.

Anal. Chem. 76, 3251-3262 (2004). This review covers the literature of TLC/HPTLC found in Chemical Abstracts and ICI Web of Science from November 1, 2001 to November 1, 2003. Review Contents: 1. History, Student Experiments, Books, and Reviews; 2. Theory and Fundamental Studies; 3. Chromatographic Systems (Stationary and Mobile Phases); 4. Apparatus and Techniques; 5. Detection and Identification of Separated Zones; 6. Quantitative Analysis; 7. Preparative-Layer Chromatography and Thin-Layer Radiochromatography 8. Literature Cited.

J. Chromatogr. 350, 151-168 (1985). TLC on silica with four developing systems: 1) ethyl acetate - methanol - 30% NH3 85:10:5, 2) cyclohexane. - toluene - diethylamine 65:25:10, 3) ethyl acetate - chloroform 5:5, 4) acetone with the plate dipped in KOH solution. Detection by spraying with Dragendorff reagent and acidified iodoplatinate solution. A two-component model accounting for 73% of the total variance. Results of great practical importance in analytical toxicology.

J. Chromatogr. 365, 63-72 (1986). Description of the separation of polar compounds based on the upper section of the "prisma" model for mobile phase optimization. Separation of ginsenosides as an example of application of the model without modifier and of the separation of flavonoid glycosides with a modifier.