Anal. Chem. 74, 6216-6223 (2002). A combined surface sampling probe/electrospray emitter was used for the direct readout of TLC plates by electrospray MS. HPTLC of methylene blue, crystal violet, and rhodamine 6G on RP-18 with methanol – tetrahydrofuran 32 containing 50-100 mM ammonium acetate, followed by MS detection in positive ion mode. HPTLC of fluorescein, naphtholblue black, and fast green FCF on PR-18 with methanol – water 73, followed by MS detection in negative ion mode. Drying by heating at 110°C for 30 min in an oven. Acquisition of mass spectra of components of individual bands was shown by manual stepping to and sampling from specific locations within the bands. Computer-controlled scanning of lanes was illustrated by using multiple ion monitoring in positive and negative ion modes. Readout resolution, the limits of scan speed, detection levels, TLC phase (restricted to nonpolar phases), and eluting solvents were investigated.

Dreidimensionale Darstellung von Dünnschicht-Chromatogrammen. (Three-dimensional graphic presentation of thin-layer chromatograms). Apart from quantification storage of chromatograms is performed graphically in many cases, this should be done in a three dimensional way. For UV-detection, acquiring and presentation of data is described. Example 1: two-dimensional HPTLC of amitriptyline derivatives on silica with 1) chloroform - methanol - 25 % NH3 90:15:1.2) toluene; example 2: TLC of structurally similar components on silica with chloroform - methanol 9:1; example 3: TLC on silica with chloroform - methanol diethylamine 90:10:1.

J. Chromatogr. 579, 203-207 (1992). TLC of the reaction mixtures in the dansyl hydrazine derivatization of the title compounds on silica with propanol - 2-propanol - butanol - water 30:45:2:20 containing 0.04M NaCl and 0.01M NH3. TLC is used for selection of the extraction solvent for the compounds.

J. Planar Chromatogr. 4, 345-359 (1991). Description of the evolution of automated multiple development from manual multiple development through programmed multiple development and discussion of the general role of solvent strength gradients and solvent selectivity emphasizing their application to AMD. The large number of experimental parameters encountered in method development is recognized as one of the main current weaknesses of AMD. The method has, however, a number of attractive features which will ensure continuing interest in the technique.

J. Planar Chromatogr. 29, 299-305 (2016). Analysis of the antioxidants ascorbic acid (1), gallic acid (2), caffeic acid (3), quercetin (4), and biogenic amines (–)-epinephrine (5), (–)-norepinephrine (6), isoprenaline hydrochloride (7), dopamine hydrochloride (8), 3,4-dihydroxy-d-phenyl-alanine (d-dopa) (9), and 3′,4′-dihydroxy-2-(methylamino)acetophenone hydrochloride (adrenalone) (10) applied as individual zones in different concentrations on silica gel, without development. Radical-scavenging activity was measured by spraying with 0.03 % 2,2-diphenyl-1-picrylhydrazyl (DPPH radical reagent) solution in methanol and stored in dark at 22 °C for 5 min, followed by scanning in a dark place. Image data was converted into chromatograms, from which the spot area as a function of the reaction time was monitored. The title "Chromatographic approach" is misleading, as there is no chromatography.

J. Chromatogr. 553, 477-487 (1991). Description of a computer program which enables scanning and evaluation with a TLC scanner. Use of the method in quantitative determination of some phenolic components in propolis, and identification and quantification of some typical flavonoids.

Chinese J. Mod. Drug Appl. 7 (13), 4-6 (2013). Sangao Tiaohe Wan pill is TCM compound for the treatment of high blood pressure, high blood lipids, diabetes mellitus, vasculitis, etc. For quality control, TLC on silica gel (1) for Salvia miltiorrhiza Bunge and tanshinone ll A with benzene – ethyl acetate 19:1, detection under white light; (2) for Panax pseudoginseng, notoginsenoside R1, ginsenoside Rb1 and ginsenoside Rg1 with chloroform - ethyl acetate – methanol – water 15:40:22:10, detection by spraying with 10 % sufuric acid in ethanol and heating at 105 °C until the spots were visible. Quantitation of tanshinone ll A by HPLC.

J. Chromatogr. 365, 229-235 (1986). Preparative isolation of different lipid classes by HPLC on silica column using a multistep gradient. HPTLC (linear, circular and anticircular) of the fractions on silica with hexane - diethyl ether - acetic acid 65:14:1 for neutral lipids, and chloroform - methanol - water 65:25:4 for polar lipids. Identification by CC/MS.