Acta Pharmaceutica Jugoslavica 36, 63-66, (1966). The fatty acids and their respective methyl esters were qualitatively examined by various TLC techniques. a) Direct TLC of fatty acids and their methyl esters on silica with petrol ether - ether - acetic acid 16:3:1 or 16:4:1; b) argentation TLC of methyl esters on silica (impregnated with 12 % silver nitrate) with petrol ether - ether 12:6. Detection by spraying with 2,7-dichlorofluorescein and inspection under 366 nm UV; c) reversed-phase TLC on silica (impregnated with 10 % liquid paraffin in petrol ether) with nitromethane - acetonitrile - acetic acid 75:10:10. Detection by spraying with FeCI3 and 0.1 M sodium molybdate solution and heating 110 °C for 3-5 minutes.

J. Chromatogr. 410, 53-76 (1987). Study of the separation of 32 alkyl-substituted phenoxyalkanoic acids from phenoxy-acetic to 3- pentadeoxylphenoxylauric acid by TLC using water, formamide or liquid paraffin as stationary phases, and chemically bonded phases. Observation of the differences of their suitability for separation of lower or higher homologues and their detection sensitivity. Discussion of the optimal methods in the separation, detection, and limit of detection.

Biochemie und Physiologie der Pflanzen 184, 127-136 (1989). TLC of abscisic acid, phaseic acid, dihydrophaseic acid and 2-hydoxymethyl abscidic acid on silica PF 254 with chloroform - ethyl acetate - acetone - acetic acid 20:30:5:1. Detection under UV 254 nm.

Acta Pharm. Sinica (Yaoxue Xuebao) 24, 397-400 (1989). TLC of bile acids on silica with isooctane - isopropyl ether - acetic acid - butanol - water 10:5:5:3:1. Detection by dipping into a solution of ammonium hydrogen sulfate in ethanol and heating at 110°C for 10 min. Quantification by fluoro densitometry. CV 1.4%. Recovery 98.4%.

(Hungarian) Elelmiszervizsgalati Közlemenyek 38, 18-26 (1992). TLC of lipoic acid on silica with chloroform – methanol – formic acid 8:1:1 and butanol – NH3 – ethanol 8:1:1. Quantitative determination by GC.

Part III. J. Planar Chromatogr. 6, 282-288 (1993). Separation of selected hydroxy and amino acids into their enantiomers by TLC on a chiral stationary phase. Proposition of a new topological index which enables distinction between isomers of D and L configuration. Separation on Chir HPTLC plates (E. Merck) of D- and L-hydroxy acids (lactic, mandelic, hydroxyvaleric and hydroxycaproic acid) with acetonitrile - water 3:2, and of amino acids (methionine, valine, leucine, serine, and isoleucine) with methanol - water - acetonitrile 1:1:4. Detection of hydroxy acids by immersion into a solution (50 mg/100 mL) of thymolphthalein in ethanolic sodium hydroxide (0.1%) and of amino acids by immersion into 0.3% ninhydrin in acetone and heating at 110 °C for 10 min.

Fat Sci. Technol. 97, 453-454 (1995). Analytical TLC of fatty acids (i. a. cyclopropenoic acid, vernolic acid) on silica with ether - hexane 2:8; 3:7. In addition preparative TLC of mixed fatty acids for separation into oxygenated and nonoxygenated fractions. Detection by spraying with dichlorofluorescein and visualization under UV.

J. Chinese Herb Med. (Zhongcaoyao) 26, 558 (1995). TLC on silica with ethyl acetate - formic acid - water 14:5:5. Detection under UV 254 nm. Quantification by spectrophotometry at 330 nm. Discussion of the differences among the herb grows in different regions.