J. Planar Chromatogr. 28, 466-471 (2015). TLC of L-glutamic acid in a solution of Astragalus complanatus coarse powder on silica gel with n-butyl alcohol - glacial acetic acid - water 4:1:1. Detection by spraying with 0.2 % ninhydrin - acetone solution 10:1, followed by heating at 105 °C. Quantitative determination by measuring pixels after photographing. Linearity was in the range of 10-60 μg/zone. Average recovery was 103 %. Different measures to reduce the error were proposed.

Am. Laboratory 16, 65-73 (1984). Review on two-dimensional TLC; the increased data output requires a new technology for in situ detection and quantification. Seven techniques surveyed.

Anal. Chem. 60, 847-852 (1988). Presentation of a method for background correction of fluorescence detection in TLC, based on the assumption that variable background signals can be modeled by the abstraction spectra obtained from factor analysis of several background spectra and the appropriate weighting factors can then be calculated by using the adaptive Kalman filter. Discussion of the best models.

J. Planar Chromatogr. 2, 362-367 (1989). Evaluation of an experimental apparatus using a cooled, slow-scan CCD camera as a detector for the quantitative spectrometric analysis of planar separations. This technology is capable of providing two-dimensional separation mapping for component detection and XY-coordinate identification; quantification either by UV/visible absorption or fluorescence.

Specific device for densitometry. Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 283-290 (1991). New fixation system to perform quantitative densitometry on soft TLC-sheets in reflectance and transmission mode.

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.