by thin-layer chromatography.) (Chinese). Chinese J. Pharm. Anal. (Yaowu Fenxi Zazhi) 11, 228-231 (1991). TLC of anthralin on silica with benzene - cyclohexane - acetic acid 80:100:2. Quantification by densitometry at 349 nm.

J. Chromatogr. 604, 290-293 (1992). TLC of ferulic acid, p-coumaric acid and vanillin on silica with hexane - ethyl acetate - isobutanol - 2-propanol - acetic acid 210:20:10:10:1. Detection by spraying with a mixture of one part of solution A containing tin(IV)oxide 0.2 g, iron(III)chloride 2 g dissolved in 0.8 M hydrochloric acid 100 mL, and three parts of solution B, consisting of 2,4-dinitrophenylhydrazine 1g dissolved in 3 M hydrochloric acid 500 mL. Quantification by spectrophotometry after elution.

J. Planar Chromatogr. 8, 300-305 (1995). TLC and HPTLC of 39 phenols on RP-18 silica and silica in 12 mobile phase systems, i. a. toluene - acetone 4:1, acetonitrile - water 7:3, chloroform, toluene. Detection under UV at 215 nm and 254 nm. Also indication of detection limits. Easy and economic TLC procedure.

Phytochemistry 45, 1003-1008 (1997). TLC of alk(en)ylcatechols on silica with chloroform - methanol 19:1 and chloroform - hexane 3:2. Detection with 10% FeCl3 in ethanol. Prep. TLC on silica impregnated with a 10% soln. of AgNO3 with hexane - ethyl acetate 19:1. Detection of antifungal compounds by TLC bioautography with Fusarium oxysporum and Helminthosporium longirostratum. Excellent application of TLC bioautography for the rapid detection of antifungal compounds.

Biochemical Systematics and Ecology 26, 647-653 (1998). TLC of mangiferin and isomangiferin on cellulose with two-dimensional system butanol - acetone - water 40:10:22. Visualization under UV 366 nm before and after exposure to NH3 vapor and by spraying with 5% AlCl3 in ethanol.

on phytopathogenic fungi and their isolated active components. J. Agric. Food Chem. 51, 2506-2511 (2003). TLC of e.g. vanillin, 4-hydroxy-3-methoxycinnamaldehyde and pinoresinol on silica gel with petroleum ether - ether 1:1 or chloroform - acetonitrile 2:1. Detection under UV. After cutting the plates in two pieces, spores of F. verticillioides were sprayed directly, on the other half vanillin - sulfuric acid reagent was sprayed followed by heating.

Acta Chrom. 13, 135-153 (2003). TLC of 17 metal cations (e.g. Cr3+ from Cr6+, Fe3+ from Mn2+ and Cr6+, VO2+ from Mn2+ and Cr6+) and 14 phenol derivatives (e.g. o-cresol from m-cresol, m-aminophenol from o-aminophenol) on silica gel impregnated with 0.001 M tributyl phosphate, with an 0.01 M aqueous micellar solution of N,N,N-cetyltrimethyl ammonium bromide as mobile phase. An aqueous solution (8.3 × 10-6 M) of the non-ionic surfactant, Brij-35 proved suitable for achieving good separations of 16 amines (e.g. p-dimethylaminobenzaldehyde from L-tryptophan, p-dimethylaminobenzaldehyde from indole) on silica layers impregnated with 0.001 M TBP. Visualization of amine or phenol spots by treatment with iodine vapour for 10 min. Metal ions were detected by spraying with the appropriate chromogenic reagent.

International Seminar on Herbal Drug Research, PN-024 (2009). HPTLC of catechins and epicatechin in leaves of tea (Camellia sinensis on silica gel with toluene - ethyl acetate - formic acid 7:5:1. Quantitative determination by absorbance measurement at 254 nm. The leaves were found to contain 10-24 % of total polyphenols.