J. Chinese Herb. Med. 26, 463-464 (1995). TLC on silica with chloroform - methanol - NH3 100:8:1. Detection by spraying with 0.5% ninhydrin in ethanol. Quantification of ephedrine by densitometry at 510 nm.

Biochemical Systematics and Ecology 24, 415-421 (1996). TLC of 3'-acetylheliosupine, heliosupine, viritiflorine, heliosupine N-oxide on silica with dichloromethane - methanol - NH3 85:15:2 or 75:23:2.

Norditerpenoid alkaloid analysis by electrospray mass spectrometry. Biochemical Systematics and Ecology 25, 279-285 (1997). TLC of alkaloids on silica with chloroform - methanol 9:1. Detection by spraying with Dragendorff's or iodoplatinate reagent.

J. Agric. Food Chem. 46, 2096-2101 (1998). TLC of a-tomatine and hydrolysis products (i.a. tomatidine) on silica gel with chloroform - methanol - 1% NH3 2:2:1, bottom layer, chloroform - methanol - 2% NH3 14:6:1, and chloroform - methanol - 1% NH3 13:7:1; 5:5:1. Visualization by spraying with anisaldehyde solution followed by heating at 120°C for 5 min.

J. Planar Chromatogr. 13, 457-462 (2000). TLC and HPTLC of extracts and standards (quinine, quinidine, cinchonine, cinchonidine) on silica gel with 7 different mobile phases. The quaternary mobile phase toluene - chloroform - diethyl ether - diethylamine 8:3:7:2 enabled the determination of alkaloids in a variety of preparations and extracts. Two different modes of densitometric evaluation (absorbance and fluorescence) were used. Results from quantitative analysis were statistically assessed by use of a calibration procedure, a calibration equation, the correlation coefficient, and the relative standard deviation.

J. Planar Chromatogr. 14, 364-370 (2001). TLC of 24 alkaloids (aconitine - yohimbine) on silica gel and aminopropyl-modified silica gel plates as well as on cyanopropyl-, diol- and RP 18-modified silica gel plates using a variety of binary mobile phases prepared from n-hexane and polar modifiers - 2-propanol, ethyl acetate, methyl ethyl ketone, tetrahydrofuran, dioxane - in different concentrations for NP chromatography and reversed-phase systems with buffered aqueous -acetonitrile mobile phases (pH 9.15). Visualization at 254 nm.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 285-289 (2003). One-dimensional TLC of 8 quinolizidine alkaloids (sparteine, a-isosparteine, retamine, hydroxylupanine, cytisine, methylcytisine, sophocarpine, lupanine) on silica gel with hexane - diethyl amine 100:0 to 1:1, on silica gel and DIOL with chloroform - methanol - NH3 100:0:1, 95:5:1 to 85:15:1, and on DIOL and RP-18 with acetonitrile - water - hydrochloric acid 30:100:5, 30:100:10, 30:100:15 and 30:100:20.. 2D-TLC on DIOL with chloroform - methanol - NH3 85:15:1 (I) in the first direction and after drying at room temperature with acetonitrile - water - hydrochloric acid 30:100:7 (II) in the second direction. In adsorbent TLC - diol plates were used in the first direction with mobile phase I. Then the alkaloids were transferred by a specially designed device on the second RP-18 plate with the mobile phase II. The same phase was then used for the second development in the perpendicular direction. Visualization by spraying with Dragendorff reagent and documentation by photography.

CBS 82, 12-15 (1999). HPTLC of ergometrine, ergotamine, and ergocryptine on silica gel with dichloromethane - methanol 9:1 with chamber saturation. Quantification by fluorescence measurement at 245/>310 nm.