J. Planar Chromatogr. 7, 88-94 (1994). Study of synchronization of timing between chemical excitation (spraying with peroxyoxalate reagent) and subsequent detection of chemiluminescence. The experimental set-up is partly described, partly referenced: N. Wu, C.W. Huie, Anal. Chem. 64, 2465-2468 (1992). Results indicate that the use of POCL detection in TLC for sensitive and selective determinations of real life samples appear promising and should be further investigated. TLC on cellulose, silica, alumina, and RP-18, of porphyrins with ethanol - dioxane 1:1 and of dansyl-glycine with chloroform - ethyl acetate - methanol 6:10:3 was used for the investigations.

J. Chromatogr. A 719, 329-336 (1997). Comparison of quantification of TLC plates with slit-scanning densitometry and with two image-analysing systems. Study of the influence of beam dimensions on the evaluation results in the reflectance and in the transmission mode. Investigation of correlation between response and sample concentration, and of the sensitivity for the two evaluation techniques.

J. Planar Chromatogr. 14, 252-255 (2001). Evaluation of a novel, low-cost imaging device for use in TLC - a commercial flat-bed scanner modified by inclusion of a 366-nm UV light source. After separation of a test dye images of native fluorescence were recorded; video densitometry was performed on the digital data obtained and compared with slit densitometry measurements. The images obtained were high quality, easily processed and archived. The spatial and intensity resolution of the recorded images were greater than those recorded using current commercial TLC video documentation equipment employing analog CCD camera technology.

J. Planar Chromatogr. 5, 388-389 (1992). Description of a technique combining polyzonal and stepwise gradient elution which enables the generation of smoother variations of eluent strength over a wider range of composition.

J. Planar Chromatogr. 11, 421-427 (1998). Study of the influence of densitometer and video TLC-documentation system settings using two different mixtures of phenolic compounds, either phenolic acids and flavonoids or coumarins, and the ethyl acetate-soluble fraction of a methanolic extract of Phyllanthus emblica L. leaves as test mixtures. HPTLC on silica gel with e.g. toluene - ethanol - formic acid - n-hexane 30:9:2:9 and on RP-18 with methanol - water 1:1 + 1% o-phosphoric acid. Detection under UV 366 nm. The settings tested for a dual-wavelength, flying-spot UV densitometer were the beam slit-size and data accumulation by reflectance mode. The CCD video camera settings tested in the video image-analyzing system were the resolution, frame ( = data) accumulation, integration period, and aperture. According to the comparison both methods can be regarded as equivalent for the detection of phenolic compounds at wavelengths of 254 and 366 nm.

J. Chromatogr. A 1218 (19), 2661-2667 (2011). Investigation of the performance of highly anisotropic nanostructured thin film ultrathin-layer chromatography (UTLC) media with porosity and architecture engineered using the glancing-angle deposition (GLAD) process. The anisotropic structures resemble nanoblades, producing channel-like features that partially decouple analyte migration from development direction, offering new separation behaviours. Study on GLAD-UTLC plate performance in terms of migration distance, plate number, retention factor and a figure of merit specific to GLAD-UTLC, track deviation angle, showing that migration distances increase with porosity by a factor of two for all feature orientations (up to a maximum of 22 mm) over the range of porosities considered in this study. Plate numbers approaching 1100 are observed for GLAD-UTLC plates when the nanoblade features are aligned with the development direction. The theoretical model describing mobile phase flow in anisotropic GLAD-UTLC media was in good agreement with experimental results. The plates provide channel features that reduce transverse spot broadening while providing the wide pores required for rapid migration and high separation performance, which may enable a greater number of parallel separations on miniaturized GLAD-UTLC plate formats. The small sizes should also make them compatible with the office chromatography concept in which office peripherals (inkjet printers and flatbed scanners) replace conventional TLC instruments.

J. High Resol. Chromatogr. 6, 203-208 (1983). TLC of dyes on silica with hexadecanol. A study on the effect of temperature on retention characteristics in TLC with low-volatility mobile phases. It is shown that temperature variations in TLC in melts bring about variations in both the relative retention values and, in some cases, in the order of migration of the chromatographic zones across the layer. The variation in the capacity factor k with temperature agrees well with Martin's equation.

Proc. of the Sixth Int. Congress of Food Science and Technology, Dublin Vol. 2, 219-220 (1983). TLC of 2, 5 dioxopiperazines on silica with chloroform - methanol 4:1. Detection with chlorine vapors and o-toluidine in acetic acid.