Bunseki Kagaku (Jap. Anal. Chem.) 42, T143-146 (1993). Description of a method for fluorescence enhancement of spots on TLC plate by wrapping a silica plate with a transparent poly(vinylidene chloride) film just after development, and vaporizing the solvent of the plate with hot air for 15 min. The detection limits of N-dansyldiethylamine, 15 pmol per spot. Application of the method to other plates, such as RP-8 or RP-18, as well as to different solvents, such as benzene, chloroform, and 1,2-dichloroethane, and to the fluorescence compounds such as N-dansylamide, N-dansylhexylamine and dansylglycine.

J. Chromatogr. Sci. 35, 156-160 (1997). Presentation of a simple empirical procedure for optimizing TLC mobile phases, based on an adaptation of the window diagrams technique and requires only a limited amount of data because acceptably accurate intermediate capacity factors and spot width values can be estimated from three initial experiments.

J. Chromatogr. A, 915 (1/2), 217-223 (2001). TLC on silica gel with chloroform - methanol 4:1. Detection by spraying with the substrate, dye and enzyme (Eltman's reagent). The advantages of the procedure were that the known inhibitor, galanthamine could be dereplicated at an early stage of the isolation procedure, and there in no disturbance from sample. Detection limits were found to be between 10 - 200 ng for several known acetylcholinesterase inhibitors tested. Comparison with Dragendorff's detection reagent.

J. Chromatogr. Sci. 46 (6), 560-564 (2008). Quantitative TLC is performed with a digital imaging system with simple equipment and software. The method was used for the quantitative assay of cichoric acid in Echinacea purpurea. TLC on polyamide phase with chloroform - methanol - formic acid - water 3:6:1:1. Detection by spraying with 3 % aqueous aluminum chloride solution. Images of chromatograms were acquired with a standard digital camera under a UV lamp at 365 nm in a dark room. The three-dimensional grayscale digital image dataset (x, y, gray) was reduced to a two-dimensional dataset (distance, accumulative gray) and then plotted as a curve. For quantification the area under the curve (corresponding to cichoric acid) was integrated.

J. Chromatogr. Sci. 54 (4), 639-646 (2016). Presentation of a low-cost method for digital image analysis of the separation results of colorless analytes on TLC plates. Quantitative TLC-digital image analysis was performed using a universal staining reagent (iodine vapor), an office scanner and a commonly available software (Microsoft Paint) for analysis of red, green and blue colors (RGB values). Urinary creatinine is used as a model analyte to represent a sample in complicated biological matrices. TLC on silica gel with butanol – ammonia solution – water 4:1:5 up to 6 cm. Detection by exposure to iodine vapors for 30–60 min. The Green value offered the best results in the linear working range of 0.08 - 0.93 mg/mL. The precision (%RSD) was 2.0 % (n=10), and the LOD 0.24 µg per zone. Comparison of the urinary creatinine concentrations determined by TLC-digital image analysis using the green value calibration graph with results obtained by HPLC showed that both are well consistent.

Discussion of the selection of fitting functions, the determination of initial parameters, etc.

J. Chromatogr. 437, 97-107 (1988). Discussion of the advantages and disadvantages of using multi-element image sensors in densitometers versus conventional electromechanical TLC scanners. Consideration of both vacuum camera tubes of the video kind and semiconductor sensor. Semiconductor devices are deemed to be preferable to camera tubes.

J. Chromatogr. 466, 37-87 (1989). Review on application of liquid crystals in TLC with 7 references. Also, other applications.