Nature - Sci. Rep. 11, 62 (2021). Samples were isopropylacetate – methanol 3:2 fractions of (1) n-hexane extracts of larvae of Apis mellifica carnica (Apidae) from hives exposed to different concentrations of neonicotinoid pesticide clothianidin in their food, as well as (2) worker jelly adsorbed from brood combs of the same hives on adsorptive filter strips (unused filter strip parts were kept as background control). HPTLC on silica gel with chloroform – methanol – water – ammonia 30:17:2:1 for (1), and with an 8-step gradient based on methanol, chloroform, toluene, and n-hexane for (2, see CBS 105: Optimization of an AMD 2 method for determination of stratum corneum lipids). Visualization at UV 366 nm before and after derivatization by immersion into primuline reagent (primuline 0.5 g/L in acetone – water 4:1). Furthermore, antibacterial activity of (2) was assessed by recording the bioluminescence on the HPTLC plates, neutralized after elution and immersed into Aliivibrio fischeri suspension. Semi-quantitative comparison showed that a higher exposure to clothianidin was correlated with a decrease in lipid composition as well as in antibacterial activity.

Rapid Commun. Mass Spectrom. 34, 8755 (2020). HPTLC of a synthetic formulated gasoline (diluting polypropylene glycol and polyisobutylene succinimide polyamine surfactant at a mass ratio of 1 % in gasoline) on silica gel with methanol - toluene 2:3. Detection under UV light. Samples were scratched for analysis by atmospheric solids analysis probe mass spectrometry (ASAP-MS).

J. Planar Chromatogr. 33, 329-340 (2020). Review of analysis of heavy metal ions by TLC, including micellar, soil and reversed-phase TLC between 2000 and 2019. The review highlighted the better performance of micellar TLC and the use of cationic and anionic surfactants.

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. 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. 28, 190-204 (2015). The analysis of multiple pesticide residues in environmental samples is often impossible in a single-step process. Comprehensive 2D planar chromatography on mono and bilayers, coupled-layer chromatography, combination of multidimensional planar chromatographic techniques, hyphenated methods are proved to be suitable.

J. Planar Chromatogr. 8, 300-305 (1995). TLC and HPTLC of 39 phenols on RP-18 silica and silica in 12 mobile phase systems, i. a. toluene - acetone 4:1, acetonitrile - water 7:3, chloroform, toluene. Detection under UV at 215 nm and 254 nm. Also indication of detection limits. Easy and economic TLC procedure.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 55-66. TLC of fungicides (imazalil, fenpropidin, benalaxyl, isoproteron, metoxuron, carbendazim, fenpropimorph, iprodion, epoxiconazol) on silica gel with AMD with a 33 step solvent gradient based on dichloromethane with acetonitrile as polar and n-hexane as nonpolar component described in DIN 38 407 Part 11. Detection of the fungicide effect of the samples using mould spores as detection agent.