J. Lanzhou Univ. (Natu. Sci. ) (Lanzhou Daxue Xuebao, Ziran Kexueban) 23, 127-129 (1987). TLC of acetone extracts on silica; densitometry. The results were found in good agreement with those obtained by chemical analysis.

Anal. Biochem. 287, 337-339 (2000). Visualization of glycoconjugates by spraying with diphenylamine-aniline-phosphoric acid reagent. Heating for 25 min at 120?C. Sensitive reagent for neutral sugars, sialic acids, 3-deoxy-D-manno-octulosonic acid, 2-keto-3-deoxy-D-glycero-D-galactonononic acid, and hexosamines found in glycoconjugates (cello- and chito-oligosaccharides, neutral glycosphingolipids, gangliosides).

J. Planar Chromatogr. 2, 161-162, (1989). Optimization of a ternary mobile phase utilizing generalized equation. Two less polar solvents were mixed 1:1 and a third, more polar solvent added to the mixture to produce mole fractions between 0.1 and 0.9. Chromatographic parameters evaluated via Rm values. For the separation of 1,4- and 1,5-isomers of naphthalene compounds on silica, carbon tetrachloride - chloroform 1:1 with the addition of 0.5 - 0.7 mole fractions of methanol or acetone were found most suitable.

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 23-32 (1991). Polystyrenes (PS) oligomer homologes with molecular weight up to 2000 were identified after TLC separation on silica with carbon tetrachloride - heptane - MEK 100:95:1 via MS.

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 103-112 (1991). Separation technique for block copolymers (BC) of homopolystyrene (PS) and homo-poly-tert-butylmethacrylate (PTBMA) on different silica gels. Detection by spraying with 3.3% KMnO4-solution in conc. H2SO4 followed by heating. Eluents were MEK, mixtures of cyclohexane - toluene - MEK as well as cyclohexane - toluene - MEK - pyridine in various amounts.

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 207-216 (1991). A simple method of analysis of polymer solutions under the conditions of adsorptionless TLC was called „viscometric TLC“. The method makes it possible to determine the polymer content in solution, the intrinsic viscosity (if weight concentration of the polymers in solution is known) and, hence, the molecular weight of polymers from the length of chromatographic zones migrating with the eluent front. The dynamics of development were investigated and the limits of applicability established. The error in the determination of intrinsic viscosity and polymer concentration in solution does no exceed 10%, and the analysis time is 30 min; 2 mg of the polymer is sufficient for the analysis. substances investigated were polystyrenes, poly(methyl methacrylates), polyisoprenes, polyvinylchloride, polycarbonates, poly-alpha-methylstyrenes and poly(vinyl alcohol). TLC on silica with tetrahydrofuran, toluene or MEK. Visualization by spraying a 1.6% solution of KMnO4 in conc. sulfuric acid and heating at 180°C for 10-15 min.

Chromatogr. Sci. 55, 807-862 (1991). A review with 70 references on TLC of polymers. Description of the main features of TLC of polymers and oligomers, the methodological problems, and the applications to analyze the various types of polydispersity.

J. Planar Chromatogr. 3, 68-72 (1990). Development of an absolute method for the determination of molecular weight distribution (MWD) of oligomers, based on i.a. 1.) the preparation of chromatograms with continuous distribution of oligomer homologues (OH) into individual peaks in the initial part of the chromatogram, 2.) the micropreparative isolation of the first two low molecular weight OH, and the determination of their structure by high resolution NMR. The MWD of oligostyrenes was calculated from the chromatograms obtained with adsorption HPTLC.