(Determination of pesticides in water - Developing of a multimethod, part 1 and 2.) Wissenschaft und Technik Verlag, Berlin, 1994. ISBN 3-928943-14-6. Review of analyzing up to 275 pesticides by gas and thin-layer chromatography including comparisons of sample preparation and gaschromatographic derivatization techniques (part 1: 210 pages, 110 figures, 37 tables and 265 literature references). Survey of 94 mass spectra of pentafluorbenzyl derivatives and 275 in situ TLC-UV-spectra (part 2).

Merck KGaA (Ed.): Chromatographie - Chronologie einer Analysentechnik - Praxis, Status, Trends, GIT Verlag mbH, Darmstadt, 222-230, ISBN 3-928865-21-8 (1996). Description of the experimental practice of the German standard DIN 38407, part 11, the field of usage and the steps of the whole procedure. Reasons for the determination limit of the procedure of 50 ng/L are given. Critical points and factors of influence are demonstrated during handling of the samples after sampling, during solid phase extraction, concentration of the eluate and AMD chromatography. The stepwise confirmation of positive results and thereby the flexibility of the method are shown.

CBS 93, 14-15 (2004). HPTLC of heterocyclic aromatic amines on silica gel WRF (prewashed with methanol by chromatography followed by drying at 120 °C for 30 min) with a 6 step gradient with diethyl ether, methanol and chloroform, with alkaline conditioning via gas phase over max. 60 mm. Quantitative determination by multi-wavelength scan in absorbance mode at 252, 262, 316 nm and fluorescence measurement at 366/>400 nm. Polynomial evaluation via peak area and height. Limit of quantitation is between 1-45 ng absolute on the plate. Online coupling with MS by use of a new extractor developed by Luftmann.

Pharmazie 61, 747-750 (2006). TLC of phenazopyridine and 4 major metabolites (i. a. p-methoxyaniline) on silica gel with chloroform - methanol mixtures. Also irradiation of phenazopyridine adsorbed on silica gel. The drug was dissolved in methanol and mixed with aqueous slurry of silica gel. TLC plates were prepared and wet plate photolyzed as such with a mercury lamp. The plate appeared as yellow chromatogram, which turned dark yellow within 15 min. The progress of reaction was monitored by Co-TLC of a withdrawn scratch with the starting drug.

The case of Bifidobacterium adolescentis MB 239. J. Planar Chromatogr. 22, 321-325 (2009). HPTLC of glucose, fructose, galactose, lactose, raffinose, 1-kestose, nystose, and fructosyl-nystose on diol phase by automated multiple development with acetonitrile - acetone - water and acetonitrile - water. Preliminary isocratic developments were performed at 22-25 °C at 65-75 % relative humidity in a twin trough chamber. Detection by vaporization with 37 % hydochloric acid vapor for 30 min followed by dipping in 4-aminobenzoic acid. Quantitative determination by fluorescence measurement at 313 nm.

Abstracts of 1985 Beijing Conference and Exhibition on Instrumental Analysis, 527 (1985). Report of state-of-the-art on instrumental TLC with special emphasis on a new automated multiple development technique employing reproducible elution gradients demonstrated by several application samples. Discussion of the combination of a densitometer with a desktop computer for controlling, data processing and quantitative evaluation.

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.

Anal. Chem. 67, 620-630 (1995). HPTLC of 265 pesticides on silica using AMD with an universal gradient based on dichloromethane. Compilation of the data for migration distances, the UV spectra, and the instrumental detection limits. Confirmation of suspect positive ones by a second analysis applying special gradients optimized for the classes. The pesticides were concentrated by solid phase extraction of 1 L drinking water.