47, 71-74 (1983). Zusammensetzung des ätherischen Öles von b-asaronfreiem Kalmus. (Composition of the essential oil from b-asarone free calamus.) TLC of 9 sesquiterpenes on alumina with hexane - ether 8:2. Detection by UV 254 nm; spraying with 5 % molybdophosphoric acid in ethanol and heating at 100 °C or spraying with 0.l g KMnO4 in 3 ml sulfuric acid.

Study of the essential oil). J. Chinese Herb Med. 18, 386-388 (1987) (Zhong Caoyao). TLC of palmitic formate on silica with benzene. Detection by spraying with vanillin reagent. Elution with diethyl ether. Identification by IR, MS.

J. Chromatogr. 645, 161-167 (1993). Preparative TLC of short-chain (C5-C20) isoprenoid diphosphates on silica with isopropanol - conc. NH3 - water 13:5:1 and 6:3:1. Detection by spraying with either water - anisaldehyde solution ormolybdenum reagent. Also, flash chromatography. From a single TLC plate up to 20 mg pure farnesyl diphosphate can be isolated.

Planta med. 66, 720-723 (2000). Analytical and preparative TLC of deca-4,6-diyn-2-(Z)-enoic methyl ester, deca-2,4-diene-4-hydroxy-6-yn-1,4-olide, and spathulenol on silica gel with hexane - acetone in different proportions e.g. 9:1; 4:1; multiple development. Visualization under UV or by spraying with vanillin - sulfuric acid reagent.

J. Planar Chromatogr. 23, 50-55 (2010). HPTLC of andrographolide on silica gel with chloroform - methanol - ethyl acetate 12:3:2 in a twin-trough chamber previously saturated for 15 min. Quantitative determination by absorbance measurement at 223 nm. The relative standard deviation of intra-day and inter-day analysis was in the range of 0.56-1.33 %. Lineartiy was given between 200-700 ng/band; the correlation coefficient was 0.9998 and the RSD 0.97 %. The limits of detection and quantification were 60 and 150 ng/band. Average recovery was 98.8 +- 0.41 %.

Planta Medica 83(01/02), 104-110 (2017). TLC on silica gel 1) to monitor the column fractionation of the chloroform partition of a methanolic maceration of Caesalpinia pulcherrima roots (eluent not given); and for preparative isolation of 2) 8,9,11,14-didehydrovouacapen-5α-ol from a subfraction of the same (with n-hexane – dichloromethane – acetonitrile 50:50:1); 3) pulcherrimin E from another subfraction (with chloroform – methanol 49:1, followed by preparative HPLC); and 4) 6β-cinnamoyl-7β-acetoxyvouacapen-5α-ol and pulcherrimin D, obtained by acetylation (in pyridine and acetic anhydride) from cinnamoyl-7β-hydroxyvouacapen-5α-ol and pulcherrimin A, respectively (eluent not given). Detection by spraying with cerium sulfate and by exposure to iodine vapor._x000D_
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Dtsch. Apoth. Ztg. 127, 1325-1330 (1987). Nachweis einer Verfälschung von Echinacea purpurea (L) Mönch mit Parthenium integrifolium L (Echinacea. Detection of an adulteration of Echinacea purpurea (L.) Moench with Parthenium integrifolium L.) TLC of sesquiterpene esters (echinadiol cinnamate, epoxyechanidiol cinnamate, echinaxanthol cinnamate, dihydroxynardol cinnamate) on silica with toluene - ethyl acetate 7:3 and of caffeic acid derivatives (e.g. cichoric acid) on silica with ethyl formiate - formic acid - water - toluene 100:10:10:5. Detection by spraying with vanillin - sulfuric acid, diphenylboryloxyethylamine (0.1 % in methanol) and 5 % ethanolic polyethyleneglycol-4000 solution, observation under UV at 365 nm.

(Chinese). J. Chinese Herb Med. 19, 66-68 (1988) (Zhongcaoyao). TLC on silica with chloroform - ether 2:1. Detection by spraying with 2% 3,5-dinitrobenzoic acid and 5% NaOH in ethanol. Quantification by densitometry at 218 nm. Recovery > 96%. Calibration curve was linear over range at 0.2-1.0 µg.