J. Planar Chromatogr. 18, 323-325 (2005). TLC of salicylic and benzoic acid on silica gel and of phenol, paracetamol, quinoline, 8-hydroxyquinoline, 4-bromoaniline, 2-chloroaniline, salicylic acid and benzoic acid on silica gel modified with DC 200 silicone oil with methanol - buffer in different volume ratios. TLC can be a valuable method for the determination of the pKa values of organic acids and bases. It is a simple and inexpensive alternative to the HPLC procedure.

J. Liq. Chromatogr. Relat. Technol. 35, 1444-1451 (2012). HPTLC of eight new p-toluenesulfonyl-hydrazinothiazole and hydrazine-bis-thiazole derivatives on silica gel RP-18 with mixtures of methanol/water in different methanol proportion between 50 to 70% with 5% increments as mobile phase. Quantitative determination by absorbance measurement at 254 nm. A chromatographic hydrophobicity index was determined and comparable results were obtained using HPLC.

5. Mittlg. Adsorptionsparameter potentieller Antimycotica des Pyrimidin-Typs und ihre Korrelation zur biologischen Wirkung. Parameters of adsorption chromatography, Part.5.: Adsorption parameters of potencial antimycotics of the pyrimidine type and their correlation with biological activity. Pharmazie 42, 513-516 (1987). TLC of 19 fungicide pyrimidine derivatives on aluminium oxide (without binder) with 48 solvent systems (benzene - methanol, benzene - ethanol and chloroform - ethanol). Detection with 0.1% KMnO4 solution acidified 10% sulfuric acid (9:1).

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 257-264 (1991). Kinetic performance parameters for several commercial TLC and HPTLC layers are presented. Influences of binder layer thickness and preparation procedures of chemically bonded layers are discussed. A comparison of TLC-layers with slurry packed liquid chromatography columns of the same particle size is given.

J. Planar Chromatogr. 5, 359-363 (1992). TLC of compounds with different molecular structures on silica using binary eluents with a wide range of polarity. Measured retention constants were in good agreement with equations derived from theories of both displacement and liquid - liquid partition phenomena.

J. Planar Chromatogr. 8, 52-62 (1995). TLC of 14 selected isomeric phenol derivatives on silicone impregnated silica with Veronal acetate buffer (pH 7.4) - acetone 65:35 and 60:40. Detection by spraying with tetradiazotized benzidine. Correlation of RM values, partition coefficients, log P, toxicological properties, log 1/CT, and antibacterial activity, log 1/CA with numerical values of the topological indices.

Part XV. J. Planar Chromatogr. 11, 61-63 (1998). Separation of 16 isomeric methylanilines and chloroanilines by TLC on silica gel and on silica gel impregnated with manganese salts and correlation of the pKa values of the compounds with RM values and with the numerical values of topological indexes. Most accurate prediction of the pKa values of the aniline derivatives investigated was achieved by use of biparametric equations employing RM values and the topological indexes °B or 'B. - TLC of aniline derivatives on 1. silica gel with benzene - ethyl acetate - acetic acid 6:3:1; 2. on silica gel impregnated with a 10% aqueous solution of Mn(C2H3O2)?4 H2O with the a.m. eluent. Detection by spraying with 4-dimethylaminobenzaldehyde solution.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 75-78. Differential scanning calorimetry and other physico-chemical investigations of chemically bonded phases (RP-8, RP-18, CN and DIOL) at elevated temperatures leading to the conclusion that a weak affect of thermal dissociation of the C-H bonds which occurs with the chemically bonded aliphatic ligands irradiated with the high-power neodymium laser of a Raman spectrophotometer results in a massive effect of the Raman scattering, enabling rapid and reliable estimation of the density of coverage of the silica matrix with the respective aliphatic ligands.