J. Liq. Chromatogr. Relat. Technol. 39, 308-311 (2016). HPTLC of trans-resveratrol in Physalis peruviana on silica gel with ethyl acetate – cyclohexane – n-butanol 9:9:2. Chemiluminescence was induced by dipping for 1 s into bis(2,4,6-trichlorophenyl)oxalate (TCPO) solution (50 mg TCPO in 36 mL n-butyl acetate, vigorously shaken for 20 min with 0.4 mL 35 % hydrogen peroxyde). After dipping, the_x000D_
wet plate was dried until no light reflection could be seen on the surface. The hRF value for trans-resveratrol was 78. The LOQ was 20 ng/zone.

Trends Anal. Chem. 82, 250-267 (2016). This review describes the application of capillary electrochromatography in food safety and food quality, from the first application in 1997, including the use of TLC for sample preparation in the analysis of sterols in the oils of sunflower, canola rice bran, olive (extra virgin), soybean, corn, peanut, grapeseed, and hazelnut.

J. Liq. Chromatogr. Relat. Technol. 40, 239-246 (2017). Review of TLC methods for the analysis of polyphenols, dyes, carboxylic acids, biogenic amines, and vitamin C in quality assessment and authentication of non-fermented or fermented beverages derived from fruits.

J. Planar Chromatogr. 30, 418-422 (2017). HPTLC-DPPH* assay of instant gruels enriched with cranberry fruits on silica gel with acetonitrile – water – chloroform – formic acid 30:2:5:2. Detection by dipping into a freshly prepared 0.1 % methanolic 2,2-diphenyl-1-picrylhydrazyl (DPPH*) solution. The plate was scanned with a flat-bed scanner every minute over an hour. The area of the standard solution of rutin at the concentration of 0.5 mg/mL was adopted as the reference point.

Food Chem. 260, 344-353 (2018). HPTLC profiling of phenolic compounds in 50 commercially available beers on silica gel with methyl ethyl ketone – toluene – formic acid 25:15:2. Detection by dipping into a 0.5 % methanolic 2-aminoethyl diphenylborinate solution, followed by drying in the air for 5 min and immersion for 3 s in a 5 % methanolic PEG 400 solution. Image acquisition at UV 366 nm. The HPTLC method was hyphenated to four different assays to demonstrate the fast discovery of single DPPH scavengers, Gram negative (A. fischeri) and Gram positive (B. subtilis) antimicrobials as well as AChE inhibitors in beers. For the DPPH assay, the plate was immersed into a 0.02 % methanolic DPPH_x000D_ solution, followed by drying at ambient temperature (25 °C) in the dark for 30 s and then heated for 30 s in a stream of warm air. Images were acquired every 30 s for a period of 10 min. For the B. subtilis bioassay, the plate was immersed_x000D_ in the prepared bacterial suspension, incubated at 37 °C for 2 h, immersed in a 0.2 % PBS-buffered MTT solution and incubated again at 37 °C for 0.5 h. For the luminescent A. fischeri bioassay, the plate was immersed in the bacterial suspension for 2 s and instant bioluminescence was captured. For the AChE assay, the plate was immersed in the enzyme solution (AChE 666 units plus 100 mg BSA ad 100 mL 0.05M TRIS buffer, pH 7.8), incubated at 37 °C for 25 min, and immersed in a substrate solution (25 mg α-naphthyl acetate and 50 mg Fast Blue salt B ad 90 mL with ethanol – water 1:2). Phenolic compounds in active zones were also characterized by HPTLC-HRMS. Effect-directed fingerprints were investigated for image processing and multivariate data analysis. Isoxanthohumol was found to be the main phenolic beer component that showed the widest spectrum of activities.

Food Chem. 278, 144-162 (2019). Review of methodologies, including TLC, HPTLC and its combination with mass spectrometry for the detection of potential biomarkers for the differentiation among species, varieties and cultivars of different foodstuffs, as well as metabolites as potential biomarkers for food authenticity according to production systems and for the detection of food spoilage and freshness.

Prepacked-column extraction and quantitative HPTLC-determination of the aflatoxins B1, B2, G1 and G2 in fungal suspensions.) Fresenius Z. Anal. Chem. 319, 527-532 (1984). Quantitative determination of aflatoxins by HPTLC after prepacked column extraction. HPTLC on silica with chloroform - acetone 9:1 and post-chromatographic treatment with paraffin - hexane 1:2. In-situ fluorescence scanning at 344/430 nm.

Lipids 18, 87-89 (1983). The chromatographic mobilities of 17 sterols and squalene on reversed-phase TLC plates with 4 nonaqueous solvent systems is described. Solvent Systems: hexane - ethyl acetate 9:1 and other systems were used. Visualization: 10 % phosphomolybdic acid in 95 % ethanol, followed by heating at 100 °C; iodine vapor; 10 % sulfuric acid in 50 % methanol, followed by heating at 100 °C.