J. Chromatogr. A 1530, 185-191 (2017). Development of a new spray-on method for applying yeast cells to HPTLC plates, leading to a much higher sensitivity of the planar yeast estrogen screen (p-YES), which can serve as a highly valuable and sensitive screening tool for the detection of estrogenic compounds in various sample matrices such as water and wastewater, personal care products and foodstuff. HPTLC of sample constituents and direct detection of estrogenic compounds by spraying with yeast cells. This resulted in much sharper signals compared to those in previous publications. Satisfying results were achieved using cultures with cell densities of 1000 FAU with reduced signal broadening, thus lower LOQ for estrogenic compounds, e.g. estrone 2 pg/zone, 17β-estradiol 0.5 pg/zone, 17α-ethinylestradiol 0.5 pg/zone and estriol 20 pg/zone. Demonstration of the possibility of the method to characterize profiles of estrogenic activity of wastewater samples with high quality and reproducibility by using native samples from wastewater or even surface water directly applied on HPTLC plates without the need for prior sample treatment.

(Determination of pesticides in water - Developing of a multimethod, part 1 and 2.) Wissenschaft und Technik Verlag, Berlin, 1994. ISBN 3-928943-14-6. Review of analyzing up to 275 pesticides by gas and thin-layer chromatography including comparisons of sample preparation and gaschromatographic derivatization techniques (part 1: 210 pages, 110 figures, 37 tables and 265 literature references). Survey of 94 mass spectra of pentafluorbenzyl derivatives and 275 in situ TLC-UV-spectra (part 2).

Acta Chrom. 11, 108-117 (2001). TLC of polyaromatic carbonyl compounds most commonly found in environmental samples (acridone, 1,2-naphthoquinone, 9,10-phenanthrenequinone, acenaphthenequinone, xanthone, 1-aminoanthraquinone, anthrone, 1,4-chrysenequinone, anthraquinone and 9-fluorenone) on silica gel and RP-18. Different combinations of solvents were evaluated as mobile phases. The best separation was obtained by use of pure dichloromethane on silica gel and methanol – water – acetonitrile 3:2:1 on RP-18 in a horizontal chamber. Evaluation under UV 254 nm and 366 nm. Quantitative determination of acridone by fluorescence measurement at 390/>400 nm, and by absorbance measurement at 250 nm for the other compounds.

CBS 99, 14-15 (2007). HPTLC of acrylamide prechromatographically derivatized with dansulfinic acid on silica gel in a twin-trough chamber with ethyl acetate over 70 mm after focussing with methanol. Detection by dipping in a 25 % solution of propylene glycol in n-hexane. Quantitative determination by fluorescence measurement at 366/>400 nm. Precision (RSD, n=3 at 3 different concentration levels each) was 4.8 % and recovery (by standard addition) was 96 %. Linearity was between 0.1 and 0.4 µg/L. The limit of quantification was 0.08 µg/L acrylamide in drinking water. Comparison with HPLC-MS/MS showed comparable results for acrylamide in ground water.

(Hungarian). (Decrease of PAH content of petrochemical wastewater utilizing activated carbon powder). TLC of pyrene, fluoranthene, 1,2-benzanthracene, 3,4-benzofluoranthene, 10,11-benzofluoranthene, 11,12-benzofluoranthene, perylene, 1,12-benzoperylene on silica with cyclohexane - benzene 4:1 and on cellulose with 1) hexane - benzene 9:1, 2) methanol - ether - water 4:4:1. Detection by UV 254 and 366 nm.

Anal. Chem. 67, 620-630 (1995). HPTLC of 265 pesticides on silica using AMD with an universal gradient based on dichloromethane. Compilation of the data for migration distances, the UV spectra, and the instrumental detection limits. Confirmation of suspect positive ones by a second analysis applying special gradients optimized for the classes. The pesticides were concentrated by solid phase extraction of 1 L drinking water.

J. Chromatogr. A 1116 (1-2), 272-276 (2006). Application of TLC to fractionate well-characterized aquatic humic materials coupled with the novel evaluation of the trihalomethane formation potential of the fractionated materials. HPTLC on silica gel with methanol - ethyl acetate 2:1. Identification of three common fractions based on retention factor (Rf) in all substances examined.

Microbiol. Res. 163, 307-313 (2008). HPTLC of norharmane from cyanobacterial culture medium extracts on silica gel with ethyl acetate - methanol - water 200:33:27 or ethyl acetate - formic acid - water 20:2:1. The hRf values of norharmane were 65 and 20, respectively. Evaluation under UV 254 nm without further derivatization. The screening of microalgal culture medium was performed by HPTLC and HPLC.