J. Planar Chromatogr. 36, 191-200 (2023). HPTLC of gatifloxacin on silica gel impregnated with 20 mM levocetirizine and levosalbutamol as chiral selector at pH 5, with acetonitrile - methanol - triethanolamine 1:3:1. Detection by exposure to iodine vapor. The hRF values for (RS)-gatifloxacin were 46 and 86, respectively. The LOD for the enantiomer of gatifloxacin was 4.2 μg/zone and 4.9 μg/zone, respectively.

J. Sep. Sci. 46, 2201065 (2023). Review of the analytical methods reported during the period 2010–2021 for enantiomer determination. The paper described TLC and HPTLC methods, including chiral selectors for the analysis of enantiomers of clenbuterol, tartaric acid and others.

J. Planar Chromatogr. 35, 533-541 (2022). HPTLC of three β-blockers, namely, (RS)-pindolol (1), (RS)-alprenolol (2), and (RS)-sotalol (3) on silica gel mixed with L-Glu as chiral selector, and methanol - acetonitrile - water - dichloromethane 9:3:4:1 as mobile phase. Detection by exposure to iodine vapor. The hRF values for (1) to (3) were 48, 44 and 55, respectively. The LOD was found within 1.3-1.7 µg/zone for (1) to (3). Recovery was between 96.3 and 98.7 % for the enantiomers.

J. Planar Chromatogr. 35, 89-95 (2022). HPTLC of epimers (+)‑catechin (1) and (-)‑epicatechin (2) in Onosma bracteatum on silica gel with diisopropyl ether - ethyl acetate - formic acid 90:2:7. Detection by spraying with p-toluenesulfonic acid reagent, followed by heating at 110 °C. Quantitative determination by absorbance measurement at 280 nm. The hRF values for (1) and (2) were 47 and 37, respectively. Linearity was between 1000 and 5000 ng/zone for (1) and (2). Interday and intra-day precisions were below 2 % (n=3). The LOD and LOQ were 284 and 863 ng/zone for (1) and 183 and 611 ng/zone for (2). Average recovery was 98.9 % for (1) and 99.0 % for (2).

J. Planar Chromatogr. 35, 83-88 (2022). HPTLC of enantiomers of (RS)-fluoxetine on silica gel impregnated with a nanocomposite of β-cyclodextrin and 3D graphene (G/β-CD NC) with methanol - acetonitrile - water 4:3:1. Detection by exposure to iodine vapor. Average precision was below 2 %. LOD and LOQ were 1.8 and 5.4 mg/mL, respectively. Recovery was between 86 and 94 %.

J. Planar Chromatogr. 34, 211-215 (2021). HPTLC of acebutolol enantiomers on silica gel with acetonitrile - methanol - water 11:5:2. Detection by exposure to iodine vapor. The stationary phase with the chiral selector was prepared by mixing 25 g silica gel with 50 mL of a 50 mM solution of colistin sulfate, followed by drying and activation overnight at 60 °C. The LOD for each enantiomer of acebutolol was 12-15 μg/zone. Recovery was between 87 and 91 %.

J. Planar Chromatogr. 33, 663-667 (2020). HPTLC of sotalol on silica gel using (S)-levofloxacin as chiral selector, with acetonitrile - methanol - water 13:5:2. Detection by exposure to iodine vapors. Linearity was between 5 and 30 µg/zone. The LOD and LOQ were 2.3 and 6.7 µg/zone, respectively. Recovery was beween 76 and 85 %.

J. of Chromatogr. Sci. 57 (6), 511-517 (2019). Ligand exchange TLC of (RS)-ketorolac and (RS)-etodolac with different combinations of solvents in different ratios without chiral additive and with Cu(II) as a complexing ion with three enantiomerically pure amino acids, namely, L-tryptophan, L-histidine and L-phenylalanine as chiral dopants. Detection by exposure to iodine vapor and viewing in daylight. The LOD of ketorolac and etodolac was 0.6 and 0.8 μg/zone, respectively. Improvement of the separation efficiency by optimizing different experimental factors, i.e., effect of temperature, mole ratio of Cu(II) to L-amino acids and solvent ratio.