from the Western Himalayas. J. Planar Chromatogr. 28, 391-394 (2015). HPTLC of precocene I in Ageratum conyzoides L. on silica gel with hexane - chloroform 3:2. Quantitative determination by absorbance measurement at 300 nm. The hRF value for precocene I was 25. The calibration range was 400-1200 ng/zone. LOD and LOQ were 1040 and 3160 ng/mL. The intermediate precision was below 6.5 % (n=3). Recovery was in the range of 98-101 %.

Pharm. Res. 32, 2663-2677 (2015). TLC for the determination of amphotericin B cargo tagged with fluorescein isothiocyanate on silica gel with ethyl acetate - methanol 2:3. Qualitative determination by fluorescence measurement at 485/>538 nm.

J. Planar Chromatogr. 28, 436-442 (2015). TLC of hydrocortisone acetate (1), fusidic acid (2), methyl paraben (3) and propyl paraben (4) on silica gel with methylene chloride – methanol – benzene 10:2:5. Quantitative determination by absorbance measurement at 240 nm. The hRF values for (1) to (4) were 13, 32, 49 and 59. The polynomial calibration range was between 1-15 μg/zone for (1) to (4). The intermediate precision was below 1.8 % (n=3). Recovery ranged 99.6-100.2 %.

J. Planar Chromatogr. 29, 15-21 (2016). Planar electrochromatography of polyaromatic hydrocarbons (thiourea, naphtalene, acenaphthylene, phenanthrene-anthracene, fluoroanthene and pyrene) on silica-based monoliths functionalized with octyl groups with citrate buffer (pH 5.4) – methanol 1:29 and a voltage of 20 kV. _x000D_

Biochem. Biophys. Res. Commun. 473, 114-117 (2016). HPTLC of ceramide produced by sphingomyelin-based liposomes on silica gel with chloroform – methanol – acetic acid 190:9:1. Detection by spraying with 10 % copper(II) sulfate, 8 % phosphoric acid aqueous solution, followed by heating at 180 °C for 10 min. The amount of ceramide present was quantitatively determined using a densitometer (unfortunately, no further details on densitometry were reported)._x000D_

J. Planar Chromatogr. 29, 273-280 (2016). HPTLC of piroxicam, tenoxicam, meloxicam and isoxicam on silica gel with ethyl acetate – toluene – butylamine 2:2:1. Detection under UV 290 nm. The method was applied to study the effect of oxidizing or reducing agents on the stability of these drugs.

J. of China Pharm. 23 (8), 26-28 (2014). Compound Pipajiegeng ointment is a herbal TCM preparation for chronic cough, upper respiratory tract inflammation, and bronchitis. For quality control, TLC (1) of Eriobotrya japonica Thunb., on silica gel with chloroform – ethyl acetate – methanol – water 16:38:22:9, detection by spraying with 5 % phosphomolybdic acid in ethanol and heating at 105 °C until the zones are visible; (2) of Pericarpium Papaveris, on 2 % NaOH-containing silica gel with toluene – acetone – ethanol - ammonium hydroxide 20:19:3:1, detection by spraying with 5 % potassium iodobismuthate solution and viewing in daylight; (3) of Platycodon grandiflorus (Jacq.) A. DC., on 0.3 % NaOH-containing silica gel with cyclohexane – chloroform – methanol 15:11:1, detection by spraying with 25 % phosphomolybdic acid in ethanol and heating at 105 °C until the zones are visible; (4) of menthol, on silica gel with n-hexane – ethyl acetate 9:2, detection by spraying with 5 % vanillin in sulfuric acid – ethanol 4:1 and heating until the zones are visible. Quantification of morphine by HPLC.

J. Chromatogr. Sci. 54 (1), 64-69 (2016). Micro-TLC of 11 species of the Mentha genus and two finished pharmaceutical products in two-dimensional mode in normal (NP) and reversed-phase (RP) systems on cyano phase with non-aqueous eluents for NP-TLC and with mixtures of acetonitrile with water or methanol with water for RP-TLC. Optimization of one-dimensional systems was performed by determining RM values vs. composition of mobile phase dependencies for standards occurring in various Mentha sp. On the basis of these dependencies the most selective chromatographic systems for each run were chosen. Then most selective eluents were applied to optimize two-dimensional systems by creating Rf in NP systems vs. Rf in RP systems correlations. The best two-dimensional systems were chosen on the basis of R(2) values for Rf vs. Rf correlations (the lowest values of R(2) coefficients). Two-dimensional micro-TLC was used to separate phenolic compounds of the examined plant materials.