J. Chromatogr. 393. 143-153, (1987). Discussion of the relationship between the densitometric response of TLC and the quantity of the substance in a particular zone. Development of transform equations which achieve approximate linearity over a wide range of concentrations. Modified solutions to the Kubelka-Munk equation used as basis. Comparison of slit scanning versus moving spot scanning, etc..

Acta Pharmaceutica Hungarica 58, 247-265 (1988). Study of the determination of hydrophobic constants by TLC. N-Heterocyclic substances were used as model mixtures.

J. Liquid Chromatogr. 12, 3121-3128 (1989). Presentation of a method of mobile phase selection for optimal separation in normal and reverse-phase TLC, based on a plot of solute retention time versus binary mobile phase composition. Method demonstrated with dye mixtures on silica and C-8 bonded silica. A total of 5 data points are required. The method is simple and does not require a computer for data analysis.

Chromatographia 37, 517-524 (1993). Proposal of a model of a unified adsorption centre, which is a generalization of the established Soczewinski equation. It closely describes the experimental curves "k'-composition of multi-component mobile phase" for all types of adsorbents under consideration in both TLC and column techniques.

Nyiredy, A. Kakuk (eds.): Planar Chromatography 2000, Lillafüred, Hungary, 24-26 June 2000, Res. Inst. for Med. Plants, p. 237-248. Determination of log kw values seem to be very useful for description of biological activity of organic substances (antifungal activity of benzanilides). Very good correlation between log kw values and minimal inhibitory concentration (MIC) values for all benzanilides and dermatophytes is observed. HPTLC of 9 benzanilides on RP18 with methanol and its aqueous solutions. Quantitation by absorbance measurement at 325 nm.

J. AOAC Int. 88, 1537-1543 (2005). HPTLC of caffeine, acetaminophen and acetylsalicylic acid on silica gel with concentration zones using methanol - ethyl acetate 3:17. UV absorption densitometry is used for the quantitative determination of caffeine. Precision, accuracy, linearity, limits of detection and quantitation, and selectivity were validated. - A comparative study using a caffeine standard solution and a multicomponent analgesic tablet solution containing caffeine, acetaminophen, and acetylsalicylic acid showed that manual application on the concentration zone, and instrumental application on the silica gel gave quite similar results in terms of number of theoretical plates, resolution, limit of detection, and linearity.

J. Planar Chromatogr. 26, 299-305 (2013). The review described the main reasons that transformed standard TLC into a reliable and regulatory acceptable technique. Different aspects that allowed the incorporation of quantitative TLC to the QA systems such as automation, standardization of analytical procedures and operational qualification and performance qualification, as well as development of digital technology and new instruments are discussed.

Examination of 150 known solvent systems. Demonstration by selecting the mobile phase for the separation of estigyn bromo derivatives