Fat Sci. Technol. 97, 428-429 (1995). TLC of the methyl esters of fatty acids (e.g. linoleic acid, linolenic acid) on silica with ether - hexane 1:9. Detection by spraying with 2,7-dichlorofluorescein solution and visualization under UV.

Part XIV. J. Planar Chromatogr. 10, 121-123 (1997). TLC of selected isomer fatty acids of cis - trans (Z - E) configuration (cis- and trans-9-octadecenoic acid, cis- and trans-11-octadecenoic acid) on RP-18 silica and Kieselguhr impregnated with a solution of paraffin oil in hexane (10%, 12.5%, or 15%) with acetic acid. Detection of the isomers of the acids with iodine vapor. In order to characterize the TLC behavior of the investigated acids, the topological index °B and the new chromatographic index I (CHR) were calculated. Results are presented as the dependence of RM values on these indexes.

Olaj, Szappan Kozmetika 48, 183.185 (1999). TLC of ethylene glycol fatty acid on silica gel with benzene - ether - 4:1. Determination with pynacryptol (0.1% in 50% ethanol).

J. Chinese Trad. & Herb. Drugs (Zhongcaoyao) 32 (5), 453-454 (2001). TLC on silica gel with 1) toluene - acetic acid - water 25:25:2. Detection by spraying with 10% sulfuric acid in ethanol and heating at 105°C for 5 min and under UV 365 nm. Identification by finger print technique.

J. Planar Chromatogr. 15, 463-465 (2002). TLC of phenolic acids (3,5-dihydroxybenzoic acid, vanillic acid, p-coumaric acid, p-hydroxybenzoic acid, gentisic acid, caffeic acid, syringic acid, sinapic acid, ferulic acid, protocatechuic acid, 2,4-dihydroxybenzoic acid) on RP-18 (first development) and in the perpendicular direction on silica gel. One-dimensional TLC on RP-18 with methanol - water 2:3, on silica gel with toluene - dioxane - formic acid 7:2:1 and with a mobile phase I, a gradient of decreasing polarity and formic acid concentration. Detection under UV 254 and 366 nm and by coupling with bis-diazotized sulfanilamide.

CBS 84, 14-15 (2000). HPTLC of wine samples on silica gel with diisopropyl ether - formic acid - water 16:3:1 with chamber saturation. Detection by heating at 110 °C for 15 min, followed by cooling to room temperature and dipping in bromophenol blue reagent. Quantitative determination of malic, lactic, and succinic acid by absorbance measurement at 430 nm.

whole-plant powder by High-Performance Thin-layer Chromatography. J. Planar Chromatogr. 19, 68-72 (2006). HPTLC of oleanolic acid on silica gel with dichloromethane - toluene - acetone - methanol 30:40:15:3. Detection by spraying with Liebermann-Burchard reagent; quantification by densitometry at 529 nm. Detection and quantitation limits were 0.1 µg and 0.5 µg, respectively. Oleanolic acid response was linear over the range 1 to 9 µg. The validated HPTLC method can be used for routine quality-control analysis of Oldenlandia corymbosa L. whole-plant powder and for quantitative determination of oleanolic acid.

J. Liq. Chromatogr. Relat. Technol. 30, 2221-2229 (2007). HPTLC of acetic, fumaric, lactic, malic, pyruvic, and succinic acid on 1) cellulose with n-propanol - 2 M ammonium hydroxide 7:3 (triple development) in a twin-trough chamber with chamber saturation, detection with aniline-xylose reagent; 2) on silica gel with n-butyl formate - 90 % formic acid - water 7:2:1, detection with ethanolic bromocresol green reagent; 3) on cellulose with water-saturated isopropyl ether - formic acid 3:1 containing 2 - 3 mg/100 mL dichlorofluororescein, detection with pyridine vapor and evaluation under UV; 4) on silica gel with n-pentyl formate - chloroform - formic acid 14:3:3 or 2:7:1, detection with bromocresol green reagent; 5) on silica gel with diisopropyl ether - formic acid - water 16:3:1, detection with bromophenol blue reagent; 6) on silica gel with diisopropyl ether - formic acid - water 90:7:3, detection with aniline - glucose reagent, or bromocresol green, bromophenol blue, bromocresol purple, or potassium permanganate reagents. Best results were obtained with method 1 on cellulose.