J. Liq. Chromatogr. & Relat. Technol. 30, 1105-1114 (2007). TLC of salvinorin A, a potent naturally occuring kappa-opioid selective agonist, on silica gel and on RP-18 with n-hexane - ethyl acetate 1:1. Detection by spraying with vanillin - phosphoric acid reagent followed by heating.

J. Planar Chromatogr. 20, 251-257 (2007). TLC with aqueous ammonia-organic modifier (acetonitrile, dioxane, acetone) mobile phases has been used to study the effect on retention of the chromatographic system and the physicochemical properties of twelve 2,4-dioxotetrahydro-1,3-thiazoles. Principal-component analysis and partial least-squares regression were used to determine the molecular properties with the greatest effect on retention for each modifier. Good correlation was obtained between experimental and calculated retention data. HPTLC on RP-18 without chamber saturation. Detection under UV 254 nm.

J. Planar Chromatogr. 20, 91-94 (2007). Descripton of the modeling of TLC separation of androstane isomers to find the optimum mobile phase. A mathematical model was developed and tested. The model takes into account the interaction between solvents and uses a complex function for modeling. The proposed mathematical model gives results similar to those obtained by use of other optimization models, e. g. the Simplex and Prisma methods. TLC of 5alpha-androstan-3beta-ol, 5alpha-androstan-3alpha-ol, 5alpha-androstan-17beta-ol, 5beta-androstan-3alpha,17beta-diol, 5alpha-androstan-3beta,17beta-diol on silica gel in a saturated chamber using different mixtures of chloroform, acetone, and petroleum ether resulting in an optimum mobile phase composition of 55:19:26. Detection by spraying with 5 % ammonium molybdate and 5 % sulfuric acid in water and heating to 80 °C.

J. Planar Chromatogr. 20, 407-410 (2007). TLC of the color pigments from different sorts of red wine (Cabernet Sauvignon, Merlot, and Burgundy) on RP-18 with acetonitrile - water - formic acid 20:29:1 in a saturated chamber. Evaluation in visible light and under UV light at 366 nm, and by spraying with a methanolic solution of 0.5 mg/mL DPPH radical (2,2.diphenyl-1-picrylhydrazyl). Densitometric evaluation. RP-TLC is a tool for monitoring wine, for identification of the origin, and for detection of adulteration.

J. Planar Chromatogr. 20, 197-202 (2007). HPTLC of guggulsterone E and Z on silica gel prewashed with methanol with petroleum ether - ethyl acetate - formic acid 30:10:1 in a twin-trough chamber saturated for 20 min. Detection and densitometric scanning at 254 nm.

J. Chromatogr. Sci. 45 (5), 263-268 (2007). TLC of microgram levels of iron, silicon, copper, nickel, titanium, magnesium, manganese, and zinc present in a high concentration aluminium matrix, on silica gel with aqueous sodium chloride solution. Quantification by densitometry. Comparison of the densitometric quantitative determination results of iron, silicon, nickel, and copper with the respective optical emission spectral analytical data.

Pharmazie 62, 803-812 (2007). TLC of anthocyanins in aronia, blueberry and lingonberry extracts and the respective preparations (e.g. capsules, lozenges, granulate) on silica gel with ethyl acetate - water - anhydrous formic acid 10:3:2 and 10:4:1. Detection in white light prior and after spraying with iron(III)chloride solution or with vanillin phosphoric acid reagent.

Chromatographia 67 (5-6), 441-447 (2008). HPTLC of forskolinon on silica gel aluminium foil with benzene - methanol 9:1. Quantitative determination by densitometry in the absorbance mode at 545 nm after spraying with anisaldehyde sulphuric acid reagent. The method was validated: linearity was between 100 and 1000 ng/spot (r = 0.994) and the limits of detection and quantification were 8 and 27 ng/spot respectively. Application of the proposed method for determination of forskolin in Coleus forskohlii root and in capsule dosage forms, which showed 0.18 and 0.57 % w/w of forskolin, which was subjected to acid and alkali hydrolysis, oxidation, photodegradation and heat degradation. The method shows good repeatability, selectivity and accuracy, and effectively separates forskolin from components of C. forskohlii root, from excipients of capsule as well as the degradation products of forskolin. It can be used for routine analysis and as a stability-indicating method.