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. Sep. Sci. 30, 3311-3315 (2007). HPTLC of lawsone in the leaves of Lawsonia alba on silica gel with chloroform – methanol 17:3. Quantitative determination by absorbance measurement at 334 nm. The hRf value of lawsone was 40 and selectivity regarding matrix was given. Linearity was between 100 and 1000 ng/zone. The precision was 1.72 % and recovery (by standard addition) was 98.8 %.

Chinese Bulletin of Biol. 47 (7), 44-46 (2012). Chloroplast pigments play an important role in plant photosynthesis and become a kind of main raw material widely applied in the preparation of antitumor photodynamic drugs and functional foods. Phytoxanthin has outstanding function in vision protection, reducing the incidence of cataracts, anticancer therapy, and delaying the occurrence of arteriosclerosis. As a demonstration experiment for high school students analysis of chloroplast pigments by TLC and column chromatography. TLC of the extracts of fresh spinach leaves on silica gel with petroleum ether (30-60 °C) – benzene – acetone 7:1:5, detection in daylight, identification of beta-carotene (orange), chlorophyll a (dark green), chlorophyll b (light green) and phytoxanthin (bright yellow) by fingerprint comparison with the standards. Preparation by column chromatography on silica gel eluted with the same sovent system, collection of fractions, and the pure products were obtained by solvent evaporation. The results indicate that the TLC method is simple, sensitive, easy to operate, more intuitive, robust and more suitable for the purpose.

J. Chromatogr. 408, 181-190 (1987). TLC of six chlorophylls and derivatives on RP-18 silica with single solvents including alcohols, acetone, acetonitrile, and binary solvents such as acetone - acetonitrile and ethanol - water. Detection by densitometry at 410 nm and 435 nm. Discussion of the retention behaviours. Also, HPLC.

Biochemical Systematics and Ecology 18, 307-316 (1990). TLC of canthaxanthin, native xanthophylls, peridinin and peridininol on silica – CaCO3 1:1 with petrol ether – acetone – isopropanol 69,5:25:4:1,5, or on silica – Ca(OH)2– MgO – CaSO4 10:4:3:1 with petrol ether – acetone – benzene – isopropanol 69.5:25:2:1.5.

(Hungarian). Acta Pharmaceutica Hungarica 64, 117-122 (1994). TLC of anthocyanins on cellulose with formic acid - hydrochloric acid - water 6:1:5. Densitometry.