J. Liquid Chromatogr. 13, 1921-1931 (1990). Preparative TLC of gangliosides on silica with chloroform - methanol - 0.3% potassium chloride 30:18:4. Detection by spraying with 0.5% orcinol in 20% sulfuric acid followed by locally heating at 80-90°C. Check of the composition by HPTLC on silica with chloroform - methanol - 0.25% CaCl2· 2 H2O 55:45:10 after elution of the corresponding uncolored zones. Identification of the composition also by 2-D TLC on silica with chloroform - methanol - 0.25% CaCl2 for the first dimension and the solvent system plus 1% NH3 for the 2nd.

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 113- 117 (1991). Use of »simplex« method for the selection of the optimum solvent system for the qualitative determination of six cleavage products. RP-TLC on self prepared silanized silica with methanol - ethyl acetate - ether - 35% NH3 5:48:46:1 (optimum solvent system). Detection by exposure to iodine vapors.

J. Agric. Food. Chem. 38, 1417-1422 (1990). TLC of 3-phenoxybenzaldehyde and 11 metabolites on silica with ethyl acetate - formic acid - water 35:2:2, hexane - toluene - acetic acid 3:15:2, toluene - ether - acetic acid 75:25:1. Detection by autoradiography. Quantification after methylation using HPLC.

J. Agric. Food. Chem. 38, 1743-1754 (1990). One- and two-dimensional TLC of PROWL herbicide, pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitobenzenamine] with chloroform - acetone - acetic acid 12:6:2 and 18:9:3, also with 4 other systems; autoradiogrphy; quantification by scintillation after scraping. Preparative TLC with 1,2-dichloroethene; two-dimensional TLC with 1. benzene and 2. heptane - triethylamine 95:5.

J. Chromatogr. 568, 1-10 (1991). Identification and quantification of over 50 molecular species of triacylglycerols, which were first resolved by silver ion TLC into seven fractions. GC and desorption chemical ionization MS.

J. Planar Chromatogr. 3, 491-494 (1990). HPTLC of six dihydroxybenzoic acids (2,3-, 2,4-, 2,5-, 2,6-, 3,4-, 3,5-) on cyanopropyl-bonded silica with solvent systems comprising different amounts (0 to 100%) of methanol in water. Visualization by fluorescence quenching at 254 nm. The ion-pair reagents studied were Cetrimide, tetramethylammonium bromide, and tetra-n-butylammonium bromide. The effectiveness of each of the three ion-pair reagents when precoated on to the plate, or present in the solvent, was investigated. For Cetrimide and tetramethylammonium bromide the best results were obtained with the reagent in the solvent, whilst for tetra-n-butylammonium bromide, precoating the plate gave the best results.

Acta Chimica, 127, 803-812 (1990). TLC of peptides on silica with ethyl acetate - pyridine - acetic acid - water 333:20:6:11, chloroform - methanol 9:1 or 1:9, butanol - acetic acid - water 4:1:1, butanol - acetic acid - water - pyridine 30:6:24:20. ethyl acetate - pyridine - acetic acid - water 148:20:6:11 and butanol - acetic acid - water 1:1:1. Detection by spraying with a 0.3% ninhydrin solution in acetone and with starch - KI reagent.

J. Planar Chromatogr. 3, 157-159 (1990). Separation of cationic ion mixtures of Mo, Re, W, and V by chromatography on alumina layers with aqueous solutions of inorganic and organic acids. These were compared with the separation of same substances on same layers with same solutions under application of a voltage gradient. The relationship between Rf values and concentrations of acids in the mobile phase were investigated and conclusions drawn. Chromatograms and electropherograms were visualized with 20% SnCl2 solution in HCl 1:1 and aqueous solution of NH4SCN. Good method to separate mixtures and to obtain information on ionic forms of rare element ions in aqueous solutions.