Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 277-281. TLC of oil samples used for deep-frying of foods (chicken filets) on silica gel with petroleum ether - ether - acetone 90:10:1. Visualization by spraying with a 10% solution of phosphorus-molybdic acid in ethanol as well as by drying at 100°C. Quantification by videodensitometry. Quick and practical TLC method.

Reports Jap. Nat. Res. Inst. Police Sci. 40, 10-15 (1987) (Kagaku Keisatsu Kenkyusho Hokoku Hokogaku Heu). Determination of paraquat dimethyl sulfate on silica with DMSO - methanol - acetone 3 :2:1. Description of its UV, IR and mass spectra.

J. Chromatogr. 587, 355-358 (1991). TLC of 6-ethoxy-2,24-trimethoyl1,2-dihydroquinoline (ethoxyquin) and the products formed during its oxidation, hydrolysis, or reduction on silica with nine solvent systems. Detection under UV 254 nm. Discussion of the stability of the compounds during analysis.

J. Planar Chromatogr. 17, 54-57 (2004). TLC of food pigments (patent blue V, quinoline yellow, brilliant blue FCF, tartrazine, azorubine, ponceau 4 R, curcumine, indigo carmine, cochineal, methyl violet, mixed carotenes, plain caramel, erythrosine B, orange yellow S) and artificial sweeteners (aspartame, acesulfame, sodium cyclamine) and benzoic acid on silica gel. Pigments were developed with isopropanol - 12.5 % ammonia 5:1; sweeteners and benzoic acid were developed with ethanol - isopropanol - 12.5 % ammonia 10:40:1. Derivatization with a solution of 0.04 g bromocresol green in 100 mL ethanol containing 0.1 M sodium hydroxide.

J. Liquid Chromatogr. 13, 1959-1965 (1990). TLC of natural waxes on silica with a solvent mixture. Detection by charring with sulfuric acid - water 1:1, and heating at 200 °C Investigation of the influence of heating time and amount of charring agent.

Relation between mobility and molecular size shown by size-exclusion chromatography. J. Chromatogr. A 1024 (1-2), 227-243 (2004). TLC of coal tar pitch and a petroleum vacuum residue with pyridine, acetonitrile, toluene and pentane. The bands of material detected were recovered in 1-methyl-2-pyrrolidinone (NMP) solvent and examined by size-exclusion chromatography (SEC) in NMP eluent. The relation between elution time in SEC and mobility on the TLC plate indicated that molecular size increased steadily with increasing immobility on the plate. This relation was reinforced by UV fluorescence spectroscopy in that the fluorescence moved to longer wavelengths with increasing immobility. The molecular size of the material excluded from the porosity of the SEC column remains undefined; some excluded material was found in all of the fractions from both samples. The valley of zero intensity separating the retained material from the excluded material may suggest a change of structure from near-planar in the retained region to three-dimensional in the excluded region.

J. Planar Chromatogr. 2, 346-354 (1989). Review of the application of HPTLC in environmental, agricultural areas, toxicology, organic and polymer research, illustrating trace quantitative capabilities, high sample through puts, simple visualization, the ability to handle relatively „dirty“ sample matrices with minimal sample clean-up and the ability to help solve difficult analytical problems. Applications are monitoring airborne reactive chemicals, compound stability studies, agricultural formulation research, characterization of polymers and copolymers and screening of surfactants in latex by HPTLC.

J. Liq. Chrom. & Rel. Technol. 26, 2751-2761 (2003). TLC of nonionic surfactants (Arkopal N40, 50, 60, 80, 90, 100, 130, 150, 230, 300, Sapogenate T60, 100, 110, 130, 138, 180, 300, 500) on zein-coated aluminium oxide prepared by dissolving 0.5 g zein in a mixture of 160 mL propanol and 40 mL water and adding to 20 g aluminium oxide, removal of the solvents at 70°C in vacuum and coating of plates with a suspension of 5 g of stationary phase and 14 mL water. Bidistilled water and water - methanol mixtures containing 5, 10, and 15 vol.% methanol were used as stationary phases. Developments were also carried out in aqueous solutions of 0.5, 1.0, 2.0, 3.5, 4.0, and 5.0 M LiCl, as well as e.g. aqueous solutions of 4 M NaCl, 4 M KCl, 4 M RbCl, 4M NH4Cl etc. After drying at 105°C, the surfactants were detected by exposure to iodine vapor.