J. Planar Chromatogr. 33, 533-546 (2020). Review of chromogenic spray reagents for the detection and identification of organic pesticides by TLC and HPTLC. Specific applications for the analysis of organochlorine pesticides, organophosphate pesticides, carbamates and synthetic pyrethroids were described.

J. Planar Chromatogr. 33, 533-546 (2020). Review of chromogenic spray reagents for the detection and identification of organic pesticides by TLC and HPTLC. Specific applications for the analysis of organochlorine pesticides, organophosphate pesticides, carbamates and synthetic pyrethroids were described.

J. Planar Chromatogr. 33, 255-262 (2020). HPTLC of triazophos in human whole blood on silica gel with n-hexane - acetone 4:1. Quantitative determination by absorbance measurement at 248 nm. The hRF value for triazophos was 18. Linearity was between 2 and 100 µg/mL. Intermediate precision was below 2 % (n=5). The LOQ was 2 µg/mL. Average recovery was 90.7 %.

J. Planar Chromatogr. 33, 203-206 (2020). HPTLC of profenofos in visceral samples on silica gel with hexane - acetone 7:3. Detection by spraying with cupric acetate reagent (4 g of cupric acetate in 100 mL distilled water), followed by heating at 120 ºC for 10 min. The hR_F value for profenofos was 44.

J. Chromatogr. A 1594, 181-189 (2019). Development of a simple and rapid procedure for the determination of quinalphos in human whole blood by HPTLC on silica gel with n-hexane – acetone 9:1 after extraction from spiked blood samples with the optimum solvent, diethyl ether, at pH 3 (average recovery = 93.6%), detection and quantification by densitometry at 325 nm in absorbance mode. Validation by examination of the effect of different organic solvents and pH on the extraction yield of quinalphos, and by investigation of the interference of other organophosphorus pesticides of forensic relevance (not observed). The linearity was in the range of 1 to 100 μg/mL with r2 = 0.9981, the sensitivity (LLOQ) at 1 μg/mL. The within-day precision and between-day precision ranged from 0.2 to 1.0%, and 0.1 to 0.8%, respectively, with an overall average recovery of 91.1% at three concentrations 1, 10, and 50 μg/mL. For different storage conditions for the samples no significant decrease in the concentration of quinalphos was observed. Application of developed procedure in three fatal cases of poisoning.

J. Planar Chromatogr. 32, 435-437 (2019). HPTLC of glyphosate in biological material (viscera, liver, spleen, kidney and lungs) on silica gel with methanol - ammonia 9:1. Detection by spraying with chromogenic reagent (2.0 g cobalt(II) chloride and 3.0 g ammonium thiocyanate in 100 mL distilled water). The hRF value for glyphosate was 46. LOD was approximately 3 µg. Recovery rate was 100.2 % for (1), 100.1 % for (2) and 99.9 % for (3).

J. Planar Chromatogr. 32, 431-434 (2019). HPTLC of 2,4-dichlorophenoxyacetic (2,4-D) acid in visceral tissue on silica gel with hexane - acetone - ethyl acetate 7:1:3. Detection by spraying with 4 % potassium ferricyanide, following by spraying with 2% 4-amminoantipyrene solution. 2,4-D was visible in daylight as brick red zone with hRF value of 82. LOD was 0.5 µg for 2,4-dichlorophenoxyacetic acid.

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.