Food Control. 71, 234-241 (2016). HPTLC of residual aflatoxin B1 after detoxification by Bacillus licheniformis CFR1 on silica gel with chloroform – ethyl acetate 4:1. Quantitative determination by absorbance measurement at 365 nm. The percentage of AFB1 degradation was calculated.

J. Ethnopharmacol. 203, 127-162 (2017). Comprehensive review of the genus Peganum, including phytochemistry and analytical methods such as TLC, TLC-bioautography and HPTLC for the determination of analytes such as harmaline, harmine, vasicine and vasicinone.

J. Planar Chromatogr. 30, 216-218 (2017). HPTLC of monocrotophos on silica gel with n-hexane – acetone 4:1. Detection by spraying with freshly prepared sodium nitroprusside reagent (1 % sodium nitroprusside in 2 N sodium hydroxide). The hRF value for monocrotophos was 80.

J. Chromatogr. Sci. 54 (7), 1077-1083 (2016). Development of a method for phenolic profiling in the assessment of authenticity of poplar-type propolis by comprising HPTLC, image processing and chemometric approach. TLC fingerprinting by applying modern TLC equipment in combination with software for image processing, pattern recognition by using the principal component analysis. Characterization of phenolic profile was performed along with the determination of the botanical and geographical origin of propolis. The results revealed that Central and Southeastern European propolis samples are rich in flavonoids, and phenolic compounds proved to be suitable markers for the determination of European propolis authenticity.

Biochem. Biophys. Res. Commun. 487, 702-708 (2017). HPTLC of the reaction products of different 14C-labeled substrates of the mevalonate pathway (MVA, MVA-5-P, MVA-3-P, MVA-5-PP) and the recombinant Flavobacterium johnsoniae protein on silica gel with n-propanol – 28 % ammonia – water 6:3:1. The distribution of radioactivity on the TLC plate was detected using a suitable image analyzer.

J. Chil. Chem. Soc. 62, 3435-3437 (2017). HPTLC of deoxynivalenol in wheat crop samples on silica gel with toluene – ethyl acetate – formic acid 6:3:1. Detection by spraying with 10 % aluminium chloride in ethanol – water 1:1, followed by heating at 120 °C for 10 min. Quantitative determination by fluorescence measurement at UV 366/>400 nm. The identity and purity of zones were confirmed by direct mass spectrometry on the plate using a TLC/MS elution head-based interface. Linearity was between 8-120 ng/zone. LOD and LOQ were 0.05 and 0.19 mg/kg, respectively. Average recovery rate was 90.1 %.

J. Chromatogr. A 1462, 134-145 (2016). Development of simple method for the separation of different colored pigment formulations used in the printing materials on food packaging to control the quality and safety of the package. HPTLC on silica gel by automated multiple development with a 9-step gradient based on ethyl acetate, methanol and water, and ending with toluene. Good resolution of differently soluble constituents of the pigment formulation like additives and coating materials. The results obtained by multi-detection allowed a first assignment of the differently detectable bands to particular chemical substance classes, enabled the comparison of different commercially available pigment batches and revealed substantial variations in the composition of the batches. Characterization of single unknown pigment constituents by HPTLC-MS and HPTLC combined with ATR-FTIR. The new HPTLC method for routine quality control for incoming pigment batches and monitoring of internal pigment production processes secures a consistent pigment composition, resulting in consistent ink quality. Hyphenation of HPTLC with the Aliivibrio fischeri bioassay revealed information on the toxicological potential of different pigment compounds which helps guarantee consumer safety, especially in regard to readily permeable pigment components.

J. Planar Chromatogr. 30, 440-452 (2017). For electroseparation experiments in a commercially available, open-air electrophoresis box, thirteen types of separation layers (filtrating paper, office paper, chromatography paper, Japanese paper for aircraft paper models, potato starch on cellulose support, common HPTLC glass plates coated with cellulose, silica gel, RP-18W, and aluminum oxide as well as glass-based nutrient agar layers) were investigated. The best separation was observed for the cellulose pre-coated TLC layer and the starch layer on filtrating paper support. The study revealed substantial differences between the electrophoretic migration of target dyes within cellulose type layers and also in comparison to the remaining stationary phases studied. Combined planar electrophoresis–electrochromatography of methyl red and ponceau R colorants on active thin-layers composed of starch powder on cellulose strips and agar layer on glass-based support connected with electrolyte containers. The resulting dye pattern on active layers was acquired using an office scanner.