J. Planar Chromatogr. 20, 411-417 (2007). HPTLC of sucralose in dietetic products on silica gel impregnated with 0.1 M dipotassium hydrogen phosphate solution, and on amino phase with acetonitrile - water 17:3. Also a mixture of sucralose, sucrose, glucose, fructose was separated on amino phases with acetonitrile - water 3:1. Detection by dipping in 2-naphthol sulfuric acid reagent and aniline diphenylamine ortho-phosphoric acid reagent, followed by heating at 120 °C. Post-chromatographic derivatization on aluminium-backed amino plates was performed by heating the plate 190 °C for 20 min. Evaluation under UV light at 366 nm. For fluorescence enhancement the amino plate was dipped into a 1:2 solution of paraffin in n-hexane. Densitometric quantification by fluorescence measurement at 366 nm and by absorbance measurement at 500 and 405 nm.

J. Planar Chromatogr. 20, 303-306 (2007). TLC of p-hydroxybenzoic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, salicylic acid, butylated hydroxyanisol, and butylated hydroxytoluene on stannic silicate with n-hexane - ethyl methyl ketone - acetic acid 80:20:3. Quantitation by scanning densitometry at 270 nm. The limit of detection and quantitation for p-hydroxybenzoic acid was 0.05 and 0.51 µg/zone, respectively.

J. Liq. Chromatogr. Relat. Technol. 30, 2329-2335 (2007). HPTLC of sterols and fatty acids on silica gel (prewashed with methanol) with petroleum ether (36-60 °C) - diethyl ether - acetic acid 80:20:1 in a twin-trough chamber with chamber saturation. Detection by spraying with a 5 % ethanolic phosphomolybdic acid solution followed by heating at 110 °C for 10 min. Quantitative determination by absorbance measurement in the visible range.

Acta Chromatographica 6, 7-14 (1996). HPTLC of fructose, glucose and sucrose on a channeled silica gel plate with concentration zone with acetonitrile - water 17:3 for three times (freshly prepared each time, taking 15 min per run) with chamber saturation for 10-15 min. Before, just the silica gel layer was impregnated by spraying with 0.10 M sodium bisulfate solution, and subsequently with citrate buffer (1:10 dilution of citrate buffer with water, pH 4.8), each followed by drying. Detection by spraying with 1-naphthol-sulfuric acid reagent, followed by heating at 100-110 °C for 5-10 min. Quantitative determination by absorbance measurement at 515 nm. The hRf values of fructose, glucose and sucrose were 47, 43, and 28, respectively, and selectivity regarding matrix was given. No zones other than the sugars were detected in sample chromatograms because of the selectivity of the detection reagent and the retention of the beverage components in the preadsorbent. Correlation coefficients (r) for linear regression of the calibration curves typically ranged from 0.90-0.99, with an average of 0.97. The precision in matrix was 2.5 % (n = 5). The mean reproducibility of the twofold sample analyses was 4 %, ranged between 0.45 % and 7.5 %. The accuracy of the method was 94.6 %, 97.0 % and 90.8 % for sucrose, glucose and fructose, respectively. Sugar concentrations in the samples ranged from 18.4-34.3 mg/mL.

J. Planar Chromatogr. 22, 363-366 (2009). HPTLC of 5-hydroxymethylfurfural in seven Turkish fruit wines and three Turkish vinegars on silca gel with toluene - ethyl acetate - 90 % formic acid 6:3:1 in a twin trough chamber saturated for 20 min. Quantitative determination by absorbance measurement at 286 nm. The limit of detection and quantification was 0.05 and 0.13 ng/mL, respectively.

J. Braz. Chem. Soc. 21, 441-446 (2010). HPTLC of ochratoxin A in wine on silica gel with toluene - ethyl acetate - chloroform - formic acid 6:3:1. Quantitative determination by absorbance measurement at 366 nm, using a CCD camera followed by images processing using the software ImageJ. Linearity was between 0.8 and 32 µg/L. The intra-day and inter-day precisions had a RSD lower than 9.9 % and 11.5 %, respectively. LOD was 16 ng/zone while LOQ was 100 ng/zone. The proposed method is a simple, efficient and low cost tool for quantitative analysis of ochratoxin A in wine samples.

J. Liq. Chromatogr. Relat. Technol. 33, 972-979 (2010). TLC of vitamin B12 on silica gel with 2-propanol - 28 % ammonia - water 7:1:2 and 1-butanol - 2-propanol - water 10:7:10 in the dark at room temperature. After drying, agar containing basal medium and pre-cultured E. coli 215 was overlaid and then incubated at 30 °C for 20 h. Detection by spraying with a methanolic solution of 2,3,5-triphenyltetrazolium salt, B12 compounds appeared as red zones indicating E. coli growth.

J. Planar Chromatogr. 24, 320-324 (2011). TLC of a red wine sample and gallic acid, caffeic acid, chlorogenic acid, p-coumaric acid, and quercetin as standards on silica gel with toluene - ethyl actate - formic acid 6:5:1 with chamber saturation for 1 h. Detection by treatment with 1 % methanolic diphenylborinic acid 2-aminoethyl ester (natural products reagent) followed by 5 % ethanolic polyethylene glycol. Evaluation under UV light at 254 and 366 nm. Also spraying with 0.04 % methanolic DPPH radical reagent. The hRf value was 65, 60, 56, 47, and 7 for p-coumaric acid, quercetin, caffeic acid, gallic acid, and chlorogenic acid, respectively.