J. Planar Chromatogr. 27, 1999-2020 (2014). HPTLC of methocarbamol in pharmaceutical mixtures with ibuprofen, paracetamol and diclofenac sodium and in the presence of its degradation product guaifenesin on silica gel with chloroform - methanol 47:3. Quantitative determination by absorbance measurement at 264 nm. A chemometric handling of the TLC peak responses involving the convolution of the derivative curves using 8-points sin x i polynomials, allowed the analysis of different mixtures of methocarbamol with enhancing of the regression parameters.

J. Planar Chromatogr. 28, 307-315 (2015). HPTLC of carbinoxamine (1), pholcodine (2) and ephedrine (3) in a pharmaceutical preparation on silica gel with chloroform - propanol - ammonia 60:40:1. Quantitative determination by absorbance measurement at UV 254 nm. The hRF values for (1) to (3) were 12, 30 and 42. Linearity was in the range of 0.5-9 ng/zone for (1), 1-10 ng/zone for (2) and 5-45 ng/zone for (3). LOD and LOQ were 0.1 and 0.4 ng/zone for (1), 0.2 and 0.6 ng/zone for (2) and 0.6 and 1.8 ng/zone for (3), respectively. Intra-day and inter-day precisions were below 2 % (n=3). Mean recoveries were around 101 % for (1) to (3). The HPTLC method was more simple, sensitive and economic than the HPLC method.

J. Liq. Chromatogr. Relat. Technol. 39, 277-280 (2016). HPTLC of azithromycin (1), imipramine HCl (2), and sulfadoxine + pyrimethamine (3/4) on silica gel with methanol – ethyl acetate – concentrated ammonia 40:10:1 for (1), methanol – ammonia 96:1 for (2) and ethyl acetate – methanol 5:1 for (3/4). Quantitative determination by absorbance measurement at 254 nm. The hRF values were 54 for (1), 40 for (2), 67 for (3) and 45 for (4). Precisions for recovery were within 5 % and RSDs for triplicate assays and validation analyses at 50, 100, and 150 % spike levels were within 3 %._x000D_

J. Planar Chromatogr. 30, 285-290 (2017). HPTLC of cefazolin sodium on silica gel with water – ethanol 3:7. Detection by exposure to iodine vapor in an iodine saturated chamber for 15 min. Quantitative determination after scanning the plate and using the free and open-source image editor GIMP 2.8. The hRF value for cefazolin was 83. Linearity was between 1 and 5 mg/mL. The intermediate precision (n=6) was <2 %. Average recovery rate was 100 %.

J. Planar Chromatogr. 31, 383-388 (2018). HPTLC of cocaine hydrochloride (1) and levamisole hydrochloride (2) on silica gel with cyclohexane – toluene – diphenylamine 75:15:10. Quantitative determination by absorbance measurement at 230 nm. The hRF values for (1) and (2) were 24 and 48, respectively. Linearity was between 200 and 2400 ng/zone for (1) and 100 and 1200 ng/zone for (2). LOD and LOQ were 14 and 42 ng/zone for (1) and 6 and 19 ng/zone for (2), respectively. The intermediate precision was <2 % (n=6). Average recovery was 99.8 % for (1) and 99.9 % for (2).

Proc. Intern. Symposium on TLC with special Emphasis on OPLC, Szeged, 24-25 (1984). HPTLC of papaverine hydrochloride on silica with diisopropyl ether - isooctane 1:1, diisopropyl ether - methanol 1:1. Quantification by fluorescence scanning (263 nm excitation).

(Hungarian). (Study of a new type of peripheric vasodilators, the CH-141 code designated pharmacon in solution. Part 2. Investigation of the mechanism of thermal decomposition and the identification of the decomposition products.) TLC on silica - Kieselguhr 1:1 with chloroform; detection by UV and with iodine; benzoic acid identified as decomposition product.

Analyst 110, 1059-1065 (1985). Development of a computer-based retrival system for the identification of drugs and poisons in forensic toxicology using TLC, GC and UV spectroscopic data. Use of the concept of discrepancy index to match experimental data for an unknown with the information in the data file.