J. Planar Chromatogr. 21, 213-215 (2008). TLC of alpha-, gamma-, and delta-tocopherol in sunflower, olive, corn, soy, and almond oil on silica gel with chloroform. Drying at room temperature. Detection by spraying with a 1:1 mixture of 0.5 % bipyridyl in methanol and 0.2 % iron(III) chloride in methanol. Densitometric evaluation with a flatbed scanner.

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.

Acta Chromatographica 6, 1-4 (1996). TLC of 5 water-soluble vitamins (vitamin C, nicotinic acid, nicotinamide, vitamin B1, rutin) on RP-18 with with water-methanol 5:4 and water-acetic acid 7:1, and of 4 fat-soluble vitamins (A-acetate, E, E-acetate and D3) on RP-18 with acetonitrile - benzene - chloroform 10:10:1. Detection of vitamin C, nicotinic acid, nicotinamide and vitamin B1 with a solution of potassium hexaiodoplatinate(IV) (10 % potassium iodide with 5 % hexachloroplatinic acid in the ratio 9:1). Detection of rutin with 25 % lead(II)acetate. Detection of fat-soluble vitamins with a 10 % solution of antimony chloride. The hRf value of water-soluble vitamins (water - methanol 5:4; water - acetic acid 7:1) was 94 and 91 (vitamin C), 76 and 57 (nicotinic acid), 71 and 40 (nicotinamide), 0 and 68 (vitamin B1), and 28 and 0 (rutin). The hRf value of fat-soluble vitamins was 80 (vitamin E and vitamin E-acetate), 62 (vitamin D3), and 86 (vitamin A-acetate). Derivative spectrophotometry (up to fifth-order spectra) was applied to the determination of vitamins B1, B6 and A-acetate in mixtures with other vitamins.

J. AOAC Int. 92, 691-697 (2009). HPTLC of dialkyl phosphate standards (dimethyl phosphate, diethyl phosphate, dimethyl thiophosphate, diethyl thiophosphate and dibutyl phosphate as internal standard) on amino phase, prewashed with methanol, with dichloromethane in a twin trough chamber. Quantitative determination by fluorescence measurement at 366/>400 nm. The limit of quantification was between 0.8 and 1.4 ng/zone. Fluorescence enhancement was achieved by dipping the plate into a 50 % solution of paraffin oil in n-hexane, increasing the sensitivity and resulting in an LOQ of 0.5-0.6 ng/zone.

Talanta, 80 (3), 1045-1051 (2010). Review on chromatographic methods for synthetic food dyes, including the following techniques: TLC, HPTLC, traditional column chromatography, HPLC, ion-pair chromatography, RP HPLC, and high performance ion chromatography, demonstrated by using examples in different conditions for each technique.

Brazilian Journal of Microbiology 42, 172-180 (2011). TLC of patulin on silica gel with toluene – ethyl acetate – formic acid 5:4:1. Detection by spraying with 0.5 % aqueous methyl-benzothiazolinone hydrazone hydrochloride monohydrate, followed by heating at 130 °C for 15 min. Quantitative determination by absorbance measurement at 366 nm. Linearity was between 45 and 2100 µg/kg. The limits of detection and quantification were 0.005 µg/kg and 14 µg/kg. The relative standard deviation for repatibility was 6.2 %. Recovery (by standard addition) was 88 % for patulin.

J. Liq. Chromatogr. Relat. Technol. 32, 1711-1732 (2009). The authors described the TLC methods available for the analysis of acidic monosaccharides, disaccharides, and oligosaccharides derived from natural sources. TLC methods for the separation and visualization of monosaccharides are examined, as well as the successful application of TLC for ganglioside analysis and the application of these separations to neoglycolipids prepared from less tractable oligosaccharides and strong acidic animal polysaccharides, such as glycosaminoglycans.

Chinese J. Ethnomed. Ethnopharm. (2), 43-44 (2012). Cissus pteroclada Hayata is a TCM herb. Its crude drug dried rattan is effective in relieving rheumatic pains, invigorating the circulation of blood and vein relaxing, and is the main component of the compound preparations for curing rheumatism, lumbar muscle degeneration, limb paralysis, and traumatic injury. TLC of the extracts of the crude drug and its main active component bergeninum on silica gel with chloroform – ethyl acetate – methanol 5:4:2, detection by spraying with 2 % aqueous ferric chloride – 2 % aqueous potassium ferricyanide 1:1, followed by mild heating.