J. Chinese Trad. Patent Med. 30 (12), Supl. 4-6 (2008). TLC of the TCM drug extracts on silica gel with 1) dichloromethane - ethyl acetate - methanol - water 15:40:22:10; 2) petroleum ether (60-90 °C) - diethyl ether 3:2; 3) petroleum ether (60-90 °C) - ethyl acetate 25:2; 4) n-butanol - acetic acid - water 4:1:2; 5) chloroform - diethyl ether 1:1. Detection 1) by spraying with 10 % sulfuric acid in ethanol followed by heating at 105 °C until coloration; 2) under UV 365 nm; 3) under UV 254 nm.

Talanta, 80 (5), 2007-2015 (2010). Presentation of a method for determination of oxybutynin hydrochloride (OX) in presence of its degradation product and additives in its pharmaceutical formulations. UV spectrophotometry using the first derivative of ratio spectra and measurment at 216 nm. Chemometric analysis using principal component regression and partial least-squares. HPTLC of OX and its degradation products methylparaben and propylparaben on silica gel with chloroform - methanol - ammonia - triethylamine 500:15:2.5:1. Quantitative determination by densitometry at 220 nm. Comparison of the results obtained with all three methods showed no significant differences.

J. of Food Sci. & Biotechnol. 27(5), 129-133 (2008). TLC of gentamicin on silica gel with the lower phase of chloroform – methanol – 25 % ammonia 5:4:3 and after chamber saturation with the upper phase of the developing solvent. Detection by exposure to iodine vapor. Identification by comparison of the hRf values with the standards of the main components of gentamicin (Cl, C1 and C2). The results were compared with results obtained by HPLC and good agreement between both methods was found.

J. Planar Chromatogr. 28, 229-233 (2015). HPTLC of paroxetine in human serum on silica gel with toluene - acetone - ethanol - ammonia 25 % in water 9:5:2:1. Quantitative determination by absorbance measurement at 294 nm. Linearity was between 0.01 and 0.14 ng/µL. The intra-day precisions were between 0.9 % and 2.2 % (n=5) and the inter-day precisions were between 1.0 % and 3.9 % (n=9). The LOD and LOQ was 0.3 and 0.6 ng/zone, respectively. Recoveries were between 91.5 % and 96.5 %.

J. Chromatogr. Sci. 56 (1), 81-91 (2018). HPTLC of mixures of tamsulosin hydrochloride (TAM) with either tolterodine tartrate (TOL) or solifenacin succinate (SOL) in bulk drug and in combined dosage forms on on silica gel with ethyl acetate – methanol – ammonia 120:80:1. Quantification by densitometry at 224 nm. Linearity was between 0.1-0.7, 0.4-4 and 1-6 μg/band for TAM, TOL and SOL, respectively.

(Detection of zimelidine (normud) and its main metabolites.) Fresenius Z. Anal. Chem. 319, 428-430 (1984).TLC of zimelidine and its main metabolite norzimelidine in biological materials on silica with 7 solvent systems, e. g. methanol -25 % NH3 99:1 or ethyl acetate - methanol -25 % NH3 85:10:5. Detection with Dragendorff reagent.

(Echinacea drugs- standardization using HPTLC and TLC.) Dtsch. Apoth. Ztg. 126, 1065-1070 (1986). TLC of sesquiterpene esters on silica with toluene - ethyl acetate 7:3. Detection with vanillin - sulfuric acid or acetic acid - phosphoric acid - dimethylaminobenzaldehyde 50:5:0.25. Separation of echinacosid with ethyl acetate - formic acid - water - acetic acid 100:11:27:11 and determination of phenolic compounds with toluene - ethyl formiate - formic acid - water 5:100:10:10.

(Identification of metabolites of dihydralazine in man.) Pharmazie 43, 33-36 (1988). TLC of 2-pyrazole, 3-pyrazole and 4-pyrazole on silica with ethyl acetate - ethanol - cyclohexane - dioxane - 25% NH3 40:20:15:15:10 and chloroform - cyclohexane - diethyl amine 70:20:10. Detection with Dragendorff reagent.