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

J. Chromatogr. 367, 155-159 (1986). Investigation of the utility of the reaction between alkylacrylates and diazomethane. TLC of whole homologous series of C1- C18 n-alkyl-3-alkoxy-carbonyl-2-pyrazolines on silica with binary systems containing benzene and ethyl acetate. Cellulose and octadecyl-bonded silica were also employed as sorbents.

J. Chromatogr. 446, 283-291 (1988). Investigation of TLC behavior of triglyceride mixtures on dimethyl dichlorosilan-bonded Kieselguhr with acetone - acetonitrile - water under different conditions. Study of influence of water content on separation. Prediction of the mobile phase composition for any triglyceride mixture according to the linear correlation between the partition number and the water content.

J. Liquid Chromatogr. 12, 247-269 (1989). Presentation of equations permitting to determine the relationships between RM values of the substances and the composition of binary and ternary mobile phases on the basis of measured chromatographic and adsorption parameters and experimentally determined partition coefficients of the substance between the mobile phase components. Good agreement between theoretical and experimental data.

Anal. Letters 27, 1075-1093 (1994). Determination of the retention of 17 monoamine oxidase inhibitory drugs by TLC on paraffin - impregnated silica plates with acetonitrile - water mixtures varying between 25 - 50 v% in steps of 5 v%, added a water-soluble ßCD polymer of 0-20 mg/mL. Determination also by HPLC. Evaluation and comparison of the methods by principal component analysis followed by two-dimensional non-linear mapping, varimax rotation around two axes and cluster analysis.