J. Liquid Chromatogr. 18, 105-115 (1995). TLC of the title compounds on silica with benzene - isopropyl ether 1:1. Detection under UV 254 nm. Identification of the eluted spots by GC-MS. Quantification by densitometry at 254 nm.

J. Chromatogr. A 1524, 266-272 (2017). Demonstration of the antibacterial profiling of Onopordum acanthium L. leaf extract and subsequent targeted identification of active compounds. Investigation of the extract against eight bacterial strains including two plant and three human pathogens and a soil, a marine and a probiotic human gut bacteria by TLC and off-line overpressured layer chromatography (OPLC) coupled with direct bioautography. Transfer of antibacterial fractions obtaining infusion-transfusion OPLC to HPLC-MS/MS analysis resulted in the characterization of three active compounds, two of them were identified as linoleic and linolenic acid. Adoption of OPLC method to preparative-scale flash chromatography for the isolation of the third active compound, which was identified after a further semi-preparative HPLC purification as the germacranolide, sesquiterpene lactone onopordopicrin. Pure onopordopicrin exhibited antibacterial activity that was specified as minimal inhibitory concentration in the liquid phase as well.

Apoth. Ztg. 123, 2431-2434 (1983). Arnikablüten: Identitäts- und Reinheitsprüfung. DC der Sesquiterpenlactone und Flavonoide. (Arnica flowers: identity and purity test. TLC of sesquiterpenelactones and flavonoids). TLC of sesquiterpene lactones on silica with a) pentane-ether 25:75, b) ethyl acetate - formic acid- acetic acid - water 100:11:11:27. Detection by UV 254 and 366 nm, with Zimmermann reagent or anisaldehyde - sulfuric acid reagent.

J. Agric. Food Chem. 38, 1035-1038 (1990). TLC of 5 known and one new sesquiterpene lactone (11(S),13-dihydrolactucopicrin) on silica with 6 eluent systems and on silica RP-18 with methanol - water 6:4, acetonitrile - water 5:5 and tetrahydrofuran - water 45:55; detection under UV 254 nm.

Biochemical Systematics and Ecology 26, 797-799 (1998). TLC of diterpenoids on silica with benzene - ethyl acetate 3:2.

J. Liq. Chromatogr. Relat. Technol. 30, 2617-2628 (2007). TLC and HPTLC of monoterpenes, e. g. menthol and menthone from peppermint, on silica gel with toluene - ethyl acetate 3:7, 4:6, ... , 9:1, and 10:0 in a horizontal chamber. Detection with methanolic vanillin - sulfuric acid reagent and under UV 254 nm. Flavonoids from hawthorn, Passiflora incarnata, hop, cacao, as well as tea were also determined by TLC and OP TLC.

J. Planar Chromatogr. 26, 93-95 (2013). TLC of piperitone in the aerial parts of Cymbopogon proximus on silica gel with hexane - ethyl acetate 4:1. Quantitative determination by absorbance measurement at 245 nm. The hRf of piperitone was 40. Linearity was in the range of 250-1000 ng/zone. Recovery (by standard addition) was between 98.8 and 99.1 %. Intermediate/interday/intra-day precision was below 2 % (n=3).

J. Chromatogr. A 1533, 213-220 (2018). HPTLC coupled with effect-directed analysis for non-targeted screening of sunflower leaf extract for components exhibiting antioxidant, antibacterial and/or cholinesterase enzyme inhibitory effects. Characterization of the active compounds by HPTLC-electrospray ionization-high resolution mass spectrometry (ESI-HRMS) and HPTLC-Direct Analysis in Real Time (DART)-MS/MS. Identification of the two bioactive diterpenes, (-)-kaur-16-en-19-oic acid and 15-α-angeloyloxy-ent-kaur-16-en-19-oic acid, by NMR spectroscopy after targeted isolation via preparative normal phase flash chromatography and semi-preparative reversed phase HPLC.