J. Planar Chromatogr. 20, 407-410 (2007). TLC of the color pigments from different sorts of red wine (Cabernet Sauvignon, Merlot, and Burgundy) on RP-18 with acetonitrile - water - formic acid 20:29:1 in a saturated chamber. Evaluation in visible light and under UV light at 366 nm, and by spraying with a methanolic solution of 0.5 mg/mL DPPH radical (2,2.diphenyl-1-picrylhydrazyl). Densitometric evaluation. RP-TLC is a tool for monitoring wine, for identification of the origin, and for detection of adulteration.

J. Planar Chromatogr. 25, 361-362 (2012). HPTLC of pigments in wheatgrass on sucrose-impregnated silica gel prepared by dipping the plates into a sucrose solution (400 g granulated sucrose/1 L distilled water), followed by heating at 110 °C for 20 min. Development with n-hexane - acetone 37:13. Detection by absorbance measurement between 400 and 800 nm. Sucrose impregnation prevents the degradation of the pigments during the analysis.

(Chinese). J. Lanzhou Univ., Nat. Sci. 23, 109-113 (1987) (Lanzhou Daxue Xuebao, Ziran Kexueban). TLC of 9 pigments (neoxanthin, violaxanthin, antheraxanthin, lutein, chlorophyll b, chlorophyll a, cryptoxanthin, pheophytins, ß-carotene) on silica with benzene - tert.butanol 9:10. Quantification by densitometry.

Biochemical Systematics and Ecology 18, 303-306 (1990). TLC of 19'-hexanoyloxyfucoxanthin, fucoxanthin, diadinoxanthin, 19-hexanoyloxyparacentrone-3-acetate, diatoxanthin and ß,ß-carotene on silica with 40% acetone in hexane, hexane – acetone – isopropanol 68,5:40:1,5 or hexane – acetone – isopropanol – benzene 17:33:1,3:17.

Biochemical Systematics and Ecology 22, 31-41, (1994). Separation of carotenoids on silica with acetone - hexane in different proportions. Preparative TLC on silica with the same hexane - acetone mixtures.

J. Agric. Food Chem. 48, 22-26 (2000). TLC of e.g. pelargonidin 3-O-, 3-O-malyl, and 3,5-di-O-glucoside on cellulose with hydrochloric acid - acetic acid - water 3:15:82 and 1-butanol - acetic acid - water 4:1:5, upper phase. Visualization under UV 365 nm.

Acta Chrom. 12, 151-158 (2002). HPTLC of lutein in nutrition supplements on RP-18 (with concentration zone, pre-washed with dichloromethane – methanol 1:1) with petroleum ether – acetonitrile – methanol 1:2:2. All sample solutions and developing chambers were wrapped in aluminum foil to protect the labile pigment from photo-decomposition. Densitometry at 448 nm. Three products containing lutein as the free alcohol or dipalmitate ester plus other ingredients were analyzed.

J. Chromatogr. A 1390, 103-111 (2015). HPTLC-Vis-ESI-MS of 6 dyes in a commercially available dye mixture on silica gel with toluene up to a migration distance of 60 mm. Detection under white light and absorbance measurement using a multi-wavelength scan at 450, 500, 530 and 620 nm. Via the TLC-MS Interface the dye zones were eluted with methanol - ammonia formiate buffer (10 mM, pH 4.8) 19:1 at a flow rate of 0.1 mL/min into a single quadrupole mass spectrometer. Electrospray ionization mass spectra were recorded in full scan mode. Characteristic m/z values of dyes were used for quantitative measurements in SIM mode. The mean precisions (n=5) were below 10 % and a mean correlation was of 0.9975 for the 6 dyes. HPTLC-MS analysis revealed the incorrect assigment of components in two commercially available dye mixtures. Photooxidation degradation products were observed for interrupted workflows (for elutions after several days when the plate was kept in daylight).