J. Planar Chromatogr. 25, 89-90 (2012). TLC of sample solutions from a horizontal rotating tubular bioreactor on cellulose-coated TLC plates. Detection of metal ions by spraying with solutions of quercetine (0.1 g/100 mL 2-propanol) and dimethylglyoxime (1.0 g/100 mL ethanol), and exposure to ammonia vapor. Linearity was found to be in the range of 0.05-1.0 g/L.

International Journal of Medical Toxicology & Legal Medicine 15 (1&2), 61-63 (2012). HPTLC for five benzodiazepines (alprazolam, clonazepam, diazepam, lorazepam and nitrazepam) on silica gel G with chloroform - acetic acid 9:1 in a presaturated TLC chamber. Detection by evaporisation with chlorine gas for 5 min, and after complete removal of chlorine, by spraying with o-tolidine reagent. Stabilisation of blue colored zones for a day by spraying the plate with 1 % phosphomolybdic acid. LOD for alprazolam, clonazepam, diazepan, lorazepam and nitrazepam was found to be 0.1, 0.5, 0.5, 1 and 0.5 µg/zone, respectively.

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).