J. Liq. Chromatogr. & Relat. Technol. 29, 2587-2592 (2006). TLC of solanesol on silica gel with petroleum ether - ethyl acetate 4:1. Detection by spraying with sulfuric acid - anisaldehyde - glacial acetic acid 5:5:90, followed by at 110 °C.

Pharmazie 60, 953-955 (2005). TLC of cochleareine, acoleareine, 14-acetyltalatisamine, and talatisamine on silica gel. Detection under UV light at 254 nm. Also co-chromatography with standards. Using a Chromatotron apparatus the crude alkaloidal mixture was separated on alumina radial plates and eluted with a gradient of petroleum ether, chloroform, and methanol.

Pharmazie 61, 15-17 (2006). TLC of seven local anesthetics (benzocaine, procaine, tetracaine, lidocaine, prilocaine, bupivacaine, articaine) and the related antiarrhythmic drug procainamide on silica gel with ethyl acetate - methanol - 32 % ammonia 96:2:3 with chamber saturation for 15 min. Detection a) under UV light at 254 nm; b) spraying with cobalt(II) thiocyanate solution; c) by subsequent spraying with Ehrlich’s reagent. Except for articaine/prilocaine all drugs could be distinguished. However, articaine could be distinguished from prilocaine and other local anesthetics by a colour reaction with copper(II) sulfate solution.

Thieme Medical Publishers Inc., New York (2006). This book presents the theoretical and technical information needed to perform reliable and reproducible high-performance thin-layer chromatography (HPTLC) to establish the identity, purity, quality, and stability of raw materials, extracts, and finished botanical products. The text provides a complete overview of the techniques and common applications of HPTLC in herbal analysis. Chapters covered are theoretical concepts (stationary phase, mobile phase, TLC results, densitometry), practical aspects of modern TLC (sample preparation, selecting the stationary phase, sample application, chromatogram development, derivatization, documentation, reporting and record keeping, TLC software, standardization), typical applications in herbal analysis, method development, and validation of qualitative and quantitative HPTLC methods.

J. Pharm. Biomed Anal. 45(2), 337-340 (2007). HPTLC of oleanolic acid and ursolic acid on silica gel impregnated with 1 % iodine solution in chloroform after sample application. Development with petroleum ether - ethyl acetate – acetone 82:18:1. Detection by spraying with a solution of 10 % sulfuric acid in ethanol followed by heating at 120 °C for 3 min. Quantification by densitometry in absorbance mode at 530 nm.

J. Planar Chromatogr. 20, 13-18 (2007). Graft TLC separation of 28 pesticides (aziprotryne, fenvalerate, desmetryn, terbutryn, pyriproxyfen, benzthiazuron, fluoroglycofen-ethyl, bensultap, benalaxyl, thiabendazole, metalaxyl, tetramethrin, imazalil, atrazine, chlorfenvinphos, methoxychlor, carbaryl, alachlor, bromopropylate, captan, diuron, tetradifon, napropamide, metribuzin, metamitron, p,p’-DDE, dinoseb, monolinuron) on connected layers - silica and octadecyl silica wettable with water, achieved by two dimensional planar chromatography using a non-aqueous mobile phase in the first dimension and an aqueous reversed-phase mobile phase in the second dimension. HPTLC on silica gel with 1) ethyl acetate - n-heptane 1:4 or 3:7 in the first dimension and, after cutting into strips, connection with RP 18 plates and transfer with methanol, with 2) methanol - water 3:2 or 3:1 in the second dimension. Detection under UV light at 254 or 366 nm.

J. Planar Chromatogr. 20, 121-125 (2007). TLC of salidroside, rosavin, rosarin, and rosin on silica gel with ethyl acetate - methanol - water 77:13:10. UV detection was performed at 215 nm for salidroside and at 245 nm for rosavin. For visualization the plates were also sprayed with vanillin - phosphoric acid reagent.

J. Planar Chromatogr. 20, 153-158 (2007). TLC of U(VI), Th(IV), lanthanides(III), Co(II), Ni(II), and Cu(II) on silica gel with di(n-butyl) and di(iso-butyl)dithiophosphoric acid as complexing agents in different organic solvents (polar and nonpolar). Visualization with 0.05 % arsenazo III for U(VI), Th(IV), and lanthanides(III), and with 0.1 % rubeanic acid in ethanol for Co(II), Ni(II), and Cu(II). Densitometric evaluation at 505 nm for Cu(II) and Co(II) and at 600 nm for Th(IV), U(VI), and Ni(II).