J. High Resol. Chromatogr. 8, 265-266 (1985). Separation of creosote extract on alumina with hexane (flow rate 4 ml/min, dropping from a 125 ml-separatory funnel) for the elution of saturated aliphatic compounds to the edge of the plate and with benzene for the PAH band (until a Rf of 0.75).

J. Chromatogr. 333, 69-81 (1985). Study on the influence of temperature gradient for different chromatographic systems using the tank developing configuration. Illustration of the method by chromatography of dansyl amino acids and aflatoxins. The enantiomers of the dansyl amino acids could be separated by 2-D-RP TLC with partial separation, then after spraying with Cu complex of N,N-di-n-propyl-L-alanine by separation in a temperature gradient. Aflatoxins B1, B2, G1, G2 were separated on silica with a temperature gradient of 20/min. over 150-180 min.

H. TRAITLER, A. STUDER, R.E. KAISER (eds): Instrumental HPTLC, Institute for Chromatography, Bad Dürkheim, FRG (1987), 255- 264. Discussion of the concept, the principles of application and practical details of planar liquid chromatography under high mobile phase pressure.

J. Planar Chromatogr. 1, 66-69 (1988). Description of a device for lifting the plate out of the solvent. The chamber can be used as a stand-alone developing system or can be connected to a laboratory robot. Detection of the solvent front by means of a double-beam optical sensor.

J. China Assoc. Instr. Anal. 8, 6-14 (1989). A review with 15 references of some recent developments in instrumental TLC techniques aiming at increasing the separation efficiency based on existing layers, such as gradient elution in normal phase, multidimensional separations by coupling gradient-elution reverse-phase HPLC with AMD normal phase gradient elution. Description of applications to phospholipids in emulsifiers, sulfonamides in feed, plastic prepolymerizate and pesticides in drinking water.

J. Planar Chromatogr. 3, 401-406 (1990). Presentation of a new device for forced flow development based centrifugal acceleration. The device enables a suitable mobile phase velocity to be used in the circular development mode of classical preparative planar chromatography. A solvent reservoir made of steel and a rubber sealing ring are placed on the layer and fixed by a magnet located below the chromatoplate. To start the separation, adsorbent is scratched from the center of the plate and the recess so produced filled with mobile phase. The device can be used in different configurations.

J. Chromatogr. Libr. 51A, A109-A150 (1992). A review with 137 references on planar chromatography with references on planar chromatography with emphasis on various chamber types and development modes including forced flow planar chromatographic methods.

J. Planar Chromatogr. 7, 329-333 (1994). Discussion of factors causing problems of OPLC, including preparation of plates, selection of mobile phase, inlet pressure, elimination of "multi-front effect", etc.