Chromatographia 31, 5-10 (1991). HPTLC of chlorophylls, phaeophytins a and b, ß-carotene, lutein, violaxanthin and neoxanthin on CN-bonded silica with chloroform - hexane - methanol 25:70:5. Determination of calibration curve functions and of the absorbance delay with time. In-situ spectra recording from 370 to 700 nm. Examination of spectra variations with the spotted amounts of pigments and the storage time. Quantification by densitometry at 425 nm with the sensitivity of 0.5 pmol for ß-carotene, 1 pmol for chlorophylls a and b, and 12 pmol for lutein.

Biochemical Systematics and Ecology 22, 835-836 (1994). TLC of malonylated malvidin glycosides, cyamidin-3-glucoside and cyanidin-3-rutinoside on microcrystalline cellulose with butanol - 2N hydrochloric acid 1:1 or acetone - hydrochloric acid - water 15:3:82.

J. Chromatogr. Sci. 38 (4), 145-150 (2000). Separation of the soluble color pigments of raisin by reversed-phase TLC. Assessment of the capacity of TLC-FTIR with both on-line and off-line coupling for the identification of the main fraction. Also, use of TLC as a pilot technique for the development of a gradient elution method for the separation of pigments by HPLC. On-line TLC-FTIR con not be used for the identification due to the strong absorbance of the stationary phase. Off-line TLC-FTIR combined with the retention behavior of the main fraction indicates that it is a polymer, caramel-like compound composed of erythrose and fructose monomers.

J. Liq. Chromatogr. Relat. Technol. 30, 2021-2036 (2007). TLC of carotenoid colorings of 95 commercial foods (33 for tomato color [lycopene], 38 for orange color [e.g. fatty acid ester of beta-cryptoxanthin], and 24 for marigold colorings [fatty acid ester of lutein]) on RP-18 with acetonitrile - acetone - n-hexane 11:7:2 and acetone - water 9:1. TLC of beta-carotene and paprika colorings of 77 commercial foods (e.g. capsanthin and its esters) on RP-18 with n-hexane - acetone - acetonitrile 2:7:1. TLC of quinone colorings (lac and cochineal colors) on RP-18 with methanol - 0.5 mol/L oxalic acid 11:9. TLC of anthocyanin colorings of 45 commercial foods (red cabbage color [derivatives of cyanidin acylglycoside]) on RP-18 with acetonitrile - 0.2 mol/L trifluoroacetic acid 1:2. Identification by recording of visible absorption spectra.

Rev. Bras. Farmacogn. 24, 133-140 (2014). HPTLC fingerprint of the leaves of Lawsonia inermis L. on silica gel with ethyl acetate - formic acid - water 82:9:9. Detection by spraying with natural product reagent (0.5 % diphenylborinic acid aminoethylester in ethyl acetate), followed by drying in the open air and dipping into macrogol reagent (0.5 % polyethylene glycol 400 in dichloromethane). Qualitative determination at UV 366 nm. Samples from Morocco, India, Pakistan, Iran, Cameroon, Tunisia, Yemen and Egypt showed three peaks at hRF 42, 45 and 52.

Acta Chimica 124, 485-489 (1987). TLC of chromonoid compounds and their degradation products on silica with benzene - ethanol 9:1. Detection under UV 254 and 366 nm. Also spraying with 1% FeCl3x6H2O in 80% aq. ethanol solution, concentrated sulfuric acid. Detection limit 0.1-0.8 µg/mL.

Chinese J. Plant Physiol. (Zhiwu Shenglixue Tongxum) (3), 51-53 (1990). TLC of chlorophylls and carotenoids on polyacrylamide with petrol ether (60-90°) - propanol - acetone - methanol 176:4:15:5. Detection by densitometry.

J. AOAC Int. 78, 491-496 (1995). TLC of bixin, lycopene, canthaxanthin, ß-apo-8'-carotenal on silica with hexane - acetone 10:9, petrol ether (40-60 °), dichloromethane - ethyl ether 9:1, petrol ether (65 - 95 °) - benzene 1:1. Quantification after elution by spectroscopy.