Food Chem. 351, 129211 (2021). High-throughput planar solid-phase extraction of 66 multi-class antibiotic residues in muscle tissue, cow milk and chicken eggs on silica gel with acetonitrile - methanol - ammonia 5:3:2 as first front-elution up to 85 mm followed by a second front-elution in the reverse direction up to 25 mm with acetonitrile -water - ammonia 9:7:4. Evaluation under UV 254 nm and 366 nm. Detection of macrolides by spraying with p-anisaldehyde sulfuric acid reagent (methanol - glacial acetic acid - sulfuric acid - p–anisaldehyde 420:50:26:3), followed by heating at 110°C for 3 min. Detection of penicillins by spraying with ninhydrin reagent (500 mg ninhydrin in ethanol - glacial acetic acid 23:2). Detection of lincosamines by spraying with aniline diphenylamine o-phosphoric acid reagent (2 g diphenylamine in methanol – o-phosphoric acid - aniline 90:10:1). Via simple clicks on the image, the auto TLC-MS interface automatically eluted the target zones at the trace level from the TLC plate into a Q Exactive Plus Hybrid Quadrupole-Orbitrap Mass Spectrometer.

J. Liq. Chromatogr. Relat. Technol. https://doi.org/10.1080/10826076.2021.1968429 (2021). Review of bioautography procedures of antimicrobial compounds in plants, including extraction of plant material, stationary and mobile phases in direct bioautography, chemical derivatization and biological detection of bioactive compounds and structure elucidation of bioactive bands. The paper also discussed new aspects of identification of biologically active substances in accordance with the principles of green analytical chemistry, and with special reference to substances with antimicrobial properties.

J. Liq. Chromatogr. Relat. Technol. https://doi.org/10.1080/10826076.2021.1932521 (2021). HPTLC of gallic acid in the stem bark of Schinus terebinthifolius on silica gel with toluene - ethyl acetate - formic acid - methanol 15:15:4:1. The plates were scanned at 254 nm and 366 nm. The hRF value for gallic acid was 43. Image features were acquired using a combination of two approaches: Haralick texture features and Zernike moments. The GNU OctaveVR software was used to set the architectures of the Artificial Neural Network. The mathematical data provided by the image analysis was correlated with the gallic acid content determined by HPLC. The method allowed the prediction of phenolic content through TLC plate images.

J. Food. Sci. 75, 239-243 (2010). HPTLC of tea made of Camellia sinensis on silica gel with chloroform - methanol - water 13:7:1. DPPH bioautography assay by spraying with 2,2-diphenyl-1-picrylhydrazyl (1 mg/mL in ethanol) under dark conditions. Detection under UV light at 254 and 366 nm. 

J. Food. Sci. 81, 1378-1384 (2016). HPTLC of Lycium barbarum samples on silica gel with n-butanol - acetic acid - water 15:8:6. DPPH bioautography assay by spraying with 0.04 % 2,2-diphenyl-1-picrylhydrazyl in methanol under dark conditions. Detection under UV light at 535 nm. 

J. Food. Sci. 81, 2218-2223 (2016). HPTLC of Coreopsis tinctoria samples on silica gel with toluene - ethyl acetate - formic acid - water 9:20:6:3. DPPH bioautography assay by spraying with 0.04 % 2,2-diphenyl-1-picrylhydrazyl in methanol under dark conditions. Detection under UV light at 535 nm. The hRF values for the antioxidant compounds were 30 for flavanomarein, 37 for marein and chlorogenic acid, 45 for 5,7,3',5'-tetrahydroxyflavanone-7-O-glucoside, 62 for 3,5-dicaffeoylquinic acid and 76 for isookanin and okanin. 

Chemosphere. 81, 299-305 (2010). HPTLC of eleven mono- and poly-substituted phenolic
compounds on RP-18 with methanol - water (with increasing methanol content from 40-70 %) (1), acetonitrile - water (40-70 %) (2), and acetone - water (45-75 %) (3) and on cyano phase with methanol - water (30-60 %) (4) and acetonitrile - water (30-55 %) (5). In all instances, the content of organic modifier was increased in steps of 5 %. Detection under UV light at 254 nm. Chromatographic descriptors were statistically established to determine the soil–water partition coefficient for the compounds.

Chemosphere. 233, 936-945 (2019). HPTLC of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in marine sediments on silica gel with n-hexane - dichloromethane - toluene 14:5:1. Qualitative identification using the wavelengths 190-310  nm. Toxicological potential of the sediment samples was determined by the intrinsic fluorescence of Aliivibrio fischeri by dipping into the bacteria solution and analysis with a BioLuminizer.