J. Planar Chromatogr. 27, 204-209 (2014). HPTLC of naringin in the leaves and stems of Rumex vesicarius on silica gel with ethyl acetate - glacial acetic acid - methanol - water 30:10:5:1. Quantitative determination by absorbance measurement at 275 nm. The hRF value for naringin was 46. Linearity was in the range of 100-1000 ng/zone. The intermediate/interday/intra-day precisions were below 2 % (n=6). The LOD and LOQ were 37 and 111 ng/zone, respectively. The average recovery was 99.5 %.

J. Liq. Chromatogr. Relat. Technol. 38, 1213-1217 (2015). HPTLC of curcumin (1) and gallic acid (2) in polyherbal microencapsulated formulations containing Curcuma longa Linn and Emblica officinalis extracts, on silica gel with chloroform - ethyl acetate - formic acid - methanol 15:12:1:1. Quantitative determination by absorbance measurement at 322 nm. The hRf values of (1) and (2) were 25 and 59, respectively. Linearity was in the range of 3-10 μg/zone for both (1) and (2). LOD and LOQ were 29 and 75 ng/zone for (1) and 0.5 and 16 ng/zone for (2), respectively. The intermediate precision was below 2.4 % (n=6). Recovery ranged between 99 and 100 % for (1) and 81 and 84 % for (2).

Food Chem. 214, 162-168 (2017). HPTLC of cinnamic acid (1), ferulic acid (2), caffeic acid (3) and flavonoid-glycosides (4) in the grains of Kodo millet (Papsalum scrobiculatum) on silica gel with ethyl acetate – formic acid – water 30:2:2. Detection by exposure to iodine vapor. The hRF values for (1) to (4) were 52, 15, 7 and 10, respectively.

J. Ethnopharmacol. 198, 158-166 (2017). HPTLC of chlorogenic acid in the stems of Solanum xanthocarpum on silica gel with ethyl acetate – glacial acetic acid – formic acid – water 8:3:3:4. Quantitative determination by absorbance measurement at 254 nm. The hRF value for chlorogenic acid was 56.

J. Liq. Chromatogr. Relat. Technol. 40, 725-731 (2017). HPTLC of butylated hydroxytoluene (BHT) in Antarctic krill on silica gel with petroleum ether – ethyl acetate – hexane 8:2:1. Detection by spraying with 5 % aqueous ferric chloride followed by heating at 105 °C for 5-10 min. Quantitative determination by absorbance measurement at 600 nm. The hRF value for BHT was 79. Average recovery was 101.8 %.

Pharmacogn. Mag. 14, 619-629 (2018). HPTLC of_x000D_ ferulic acid (1), chalcone (2), and catechin (3) in Saraca asoca extract on silica gel with toluene – ethyl acetate – formic acid – methanol 15:15:4:1. Qualitative evaluation at UV 280 nm. The hRF values for (1) to (3) were 79, 88 and 67, respectively.

Phytochemistry 25, 2605-2608 (1986). TLC of new hydroxycinnamic acid esters on microcrystalline cellulose with chloroform - formic acid - water 3:2: water saturated, butanol - formic acid - water 6:1:2, 10 % aq. formic acid or butanol - formic acid water 2:1:1. Detection by UV at 254 nm. Also PLC with chloroform - formic acid 3:2 and column chromatography on polyamide.

DC- und HPLC-Analyse von Ginkgo- Extrakten und Ginkgo-Extrakte enthaltenden Phytopräparaten. (Ginkgo Biloba. TLC and HPLC analysis of ginkgo extracts and phytopreparation containing ginkgo extracts.) Deutsche Apotheker Zeitung 129, 2421-2429 (1989). TLC of flavonol glycosides, aglycones, ginkgolides, procyanidins, acylphenols and phenolcarbonic acids on silica with ethyl acetate - acetic acid - formic acid - water 100:11:11:26 for flavonol glycosides; chloroform - acetone - formic acid 75:16.5:8.5 for aglycones; toluene - acetone 70:30 for gingkolides; ethyl acetate - acetic acid - water 10:2:3 for procyanidines; chloroform - methanol 8:2 for acylphenols and phenolic carbonic acids. Visualization under UV 254 and 366 nm and by spraying with Naturstoff-polyethyleneglykol reagent, anisaldehyde - sulfuric acid reagent, hydroxylamine - Fe(III)-chloride reagent, vanillin - phosphoric acid reagent, Fe(III)-chloride and fast blue reagent.