J. Liquid Chromatogr. 15, 1639-1663 (1992). Description of a portable TLC device.

J. Planar Chromatogr. 11, 353-356 (1998). A mixture of ten pesticides - MCPA, atrazine, propham, chloropham, ofurace, triadimefon, biteranol A, biteranol B, tetramethrin, and a-cypermethrin - has been separated by two-dimensional development on cyano HPTLC plates with a polar mobile phase (methanol - water 3:2) in the first direction and a nonpolar mobile phase (hexane - ether 1:1) in second dimension. Chromatograms were recorded with a sensitive color CCD camera and evaluated with a software. Two quantification modes were compared - scanning of the whole plate and scanning of manually defined bent tracks. The precision of video-densitometric quantitation of the 2D chromatogram, expressed as the repeatability of image capturing and track setting, was determined.

J. Planar Chromatogr. 5, 338-342 (1992). Investigation of the performance of a charge-coupled device for detection of sample bands on a thin-layer chromatogram, whereby the CCD camera is mounted on a modular system configured for mass spectrometric analysis of the same TLC plates. Sensitivity of detection under several modes of illumination for model compounds is explored.

J. Planar Chromatogr. 12, 109-113 (1999). Development of an alternative approach to the direct-immersion washing technique to minimize surface contamination further, or to eliminate it. Plates from 4 suppliers were first washed by ascending development with methanol, dried, and then washed by immersion in the same solvent. Surface residues remaining on the plates were visualized by fluoro- and UV densitometry. The improved, two-step ascending development-immersion prewashing technique yielded adsorbent layers that were essentially free from surface contamination, an essential requirement when residues at the ppb level and below are analyzed by this means. Scanning in the fluorescence mode at 366 nm.