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 41, acetonitrile - water 73, 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.

J. Planar Chromatogr. 20, 321-326 (2007). Investigation of factors affecting the separation, including the use of different stationary and mobile phases, different methods of development, humidity, and chamber saturation. TLC and HPTLC of dimethyl, diethyl, di-n-butyl, and bis-(ethylhexyl) phthalate on silica gel, prewashed with chloroform - methanol 11 or the mobile phase, in horizontal chambers, Vario chambers, and twin-trough chambers with 12 different mobile phases. Best separations were achieved with hexane - acetone 41 or hexane - toluene - ethyl acetate 983. Densitometric evaluation at 220 nm.

J. Chromatogr. A 1497, 155-163 (2017). Development of a planar yeast estrogen screen for the determination of estrogen active compounds. Introduction of resorufin-?-D-galactopyranoside, providing the orange fluorescing resorufin after enzymatic cleavage, as the planar yeast estrogen screen (pYES) substrate to determine estrogen active compounds (EAC). For samples containing blue fluorescent components, this substance is better suited than the generally employed substrate 4-methylumbelliferyl-?-D-galactopyranoside, which delivered blue fluorescing 4-methylumbelliferone after enzymatic cleavage by the YES reporter ?-D-galactosidase. The mean LOD and LOQ was 3.5 and 6.5 pg/zone for 17?-estradiol (1) and 17?-ethinylestradiol (2), respectively; recoveries were close to 100% for (1) and (2) from spiked water samples in a concentration range of 2–20 ng/L.

J. Planar Chromatogr. 8, 75-77 (1995). TLC of azaarenes (i.a. acridine, benzo(h)quinoline, benzo(f)quinoline, phenanthridine, azafluorene) on silica with dichloromethane - methanol 201. Detection under UV 254 and 265 nm, followed by spraying with specific reagents for detection of functional groups. GC-MS after elution with dichloromethane - methanol 11.

J. Planar Chromatogr. 19, 129-134 (2006). HPTLC of enrofloxacin, oxytetracycline, and trimethoprim on cyano phases with 0.5 M oxalic acid - methanol (55; 64; 73; 82). Detection under UV light at 254 nm. Quantitation by videodensitometry at 254 nm.