Chemosphere. 90, 2157-2171 (2013). HPTLC of glycerophospholipids in liver and brain of male Atlantic cod (Gadus morhua) on silica gel (washed with methyl acetate - isopropanol - chloroform - methanol - 0.25 % KCl 25:25:25:10:9 and activated at 120 ºC for 30 min) with hexane - diethylether - acetic acid 40:10:1. Detection by spraying with 0.1 % dichlorofluorescin in 98 % methanol and 0.001 % 3,5-di-tert-4butylhydroxytoluene (BHT). Lipid classes were futher analyzed by gas chromatography with a flame ionization detector. 

Anal. Bioanal. Chem. 411, 6767-6775 (2019). HPTLC of nonylphenols in surface waters on RP-18 with n-hexane - acetonitrile - toluene 8:4:3, followed by a second development with n-hexane - ethyl acetate - toluene 5:8:1. Yeast estrogen screen was performed by dipping into a suspension of genetically modified Saccharomyces cerevisiae BJ3505 cells, followed by incubation at 30 ºC for 4 h with a relative humidity of approximately 100 %. The dried plate was then immersed in the substrate solution for 3 s (0.1 mg/mL resorufin-β-D-galactopyranoside - RGP) and again incubated at 37 ºC for 30 min. Drying, dipping, and incubation with RGP was repeated two times. Quantitative determination by fluorescence measurement at 550 nm/> 580 nm. Linearity was between 15 and 40 ng/zone. The LOD and LOQ were 14 and 26 ng/zone. Average recovery was 95 %.

Anal. Bioanal. Chem. 413, 1321-1335 (2021). HPTLC of estrone (1), 17β-estradiol
(2), 17α-ethinylestradiol (3), 5α-dihydrotestosterone (4), and progesterone (5) in wastewater and surface water samples on silica gel with a mixture of dichloromethane, cyclohexane, and acetone in different proportions. Detection by spraying with 8 % sulfuric acid in ethanol, followed by heating at 105 ºC for 10 min. Qualitative identification under UV light at 310 nm. Yeast multi endocrine-effect screen was performed by spraying the HPTLC plates with a mixed suspension of genetically modified Arxula adeninivorans yeast strains, which contain either the human estrogen, androgen, or progesterone receptor. The HPTLC plates were incubated at 30 ºC for 18 h and at 100 % humidity. After incubation, densitometric evaluation at: 445/K460 nm, 475/K500 nm and 542/K560 nm to determine the fluorescence of the cyan fluorescent protein (CFP, gestagen), green fluorescent protein (GFP, androgen), and DsRed2 protein (estrogen), respectively. The hRF values for (1) to (5) were 21, 22, 29, 34 and 39, respectively.

J. Planar Chromatogr. 32, 421-429 (2019). HPTLC of levamisole (1), pyrantel pamoate (2), albendazole (3), and febantel (4) on silica gel with dichloromethane - methanol - formic acid 18:1:1. Quantitative determination by absorbance measurement at 254 nm. The hRF values for (1) to (4) were 10, 15, 47 and 79, respectively. Linearity was between 600 and 1500 µg/L for (1), 400 and 1000 µg/L for (2), 200 and 1000 µg/L for (3) and (4). The obtained RSD values were in the range from 7.0 % to 8.8 % for intra-day precision and from 8.1 % to 13.1 % for inter-day precision (n=3). The LOD and LOQ were 300 and 600 µg/L for (1), 200 and 400 µg/L for (2) and 100 and 200 µg/L for (3) and (4), respectively. Recovery rate was above 95 % for (1) to (4).

J. Liq. Chromatogr. Relat. Technol. 41, 1052-1065 (2019). Review of the following topics for the period of November 1, 2016 to November 1, 2018: sample preparation for TLC pesticide analysis; lipophilicity and retention studies for the study of biological activity; new reagents for pesticide detection; HPTLC-effect directed analysis on the surface of the layer; TLC-Raman spectrometry for the analysis of thiabendazole, triazophos, and phosmet residues; TLC analysis of radiolabeled pesticides; methods for the separation, detection, and qualitative and quantitative determination of pesticide residues; determination of pesticides in commercial products and the use of TLC for pesticide degradation studies. The review highlighted the isolation, characterization, and determination of less hazardous and less toxic biopesticides from plants, bacteria, fungi, and soil as the most active application area of pesticide TLC today.

J. Liq. Chromatogr. Relat. Technol. 42, 311-316 (2019). HPTLC of equol in cattle manure with methyl t-butyl ether - cyclohexane 1:1. The plate was scanned with a Time of Flight – Direct Analysis in Real Time – Mass Spectrometry (TOF-DART-MS) system. The hRF value of equol was 71. The LOD and LOQ for equol were 2.4 µg/zone and 4.5 µg/zone, respectively. 

J. Planar Chromatogr. 32, 173-182 (2019). HPTLC of chlorinated metformin samples with genotoxic effect obtained by umu assay (Salmonella typhimurium TA1535/pSK1002 Assay) on silica gel in a gradient development with methanol - formic acid 2000:1, dichloromethane and n-hexane. A TLC-MS interface was used for further analysis by LC-high-resolution mass spectrometry. 

J. Planar Chromatogr. 20, 347-351 (2007). TLC of DTAB on soil, silica gel, alumina, and kieselguhr with fifteen mobile phases, such as aqueous solutions of ammonium sulfate and urea, with chamber saturation for 10 min. Detection by spraying with modified Dragendorff reagent. Among the systems studied the best system for selective separation of DTAB from multicomponent mixtures of other surfactants was kieselguhr - 0.1 M ammonium sulfate. Semi-quantitative determination by spot-area measurement.