Research Journal of Pharmaceutical, Biological and Chemical Sciences 2(1), 6-11 (2011). HPTLC of tolterodine tartarate on silica gel with acetonitrile - water - formic acid 50:50:3 with chamber saturation for 15 min. Quantitative determination by densitometry in absorbance mode at 281 nm. The content of tolterodine tartarate in the formulation was calculated and found to be 99.1 %. The recovery (by standard addition) was between 99.1-100.1 %. LOD was 21 and LOQ 53 ng/zone. The intra-day and inter-day precisions (%RSD) were 0.05 and 0.08 %, respectively.

J. Liq. Chromatogr. Relat. Technol. 38, 1104-1108 (2015). HPTLC of trans-resveratrol on silica gel with ethyl acetate - cyclohexane - n-butanol 9:9:2. Detection through chemiluminescence by dipping into a TCPO solution (250 mg bis(2,4,6-trichlorophenyl)oxalate in 36 mL n-butyl acetate, followed by adding 0.4 mL hydrogen peroxide that was vigorously shaken with the solution for 20 min). The HPTLC plate was covered by a glass plate and measured for 2 min using a very light-sensitive CCD camera. The hRF value for trans-resveratrol was 78. Linearity was in the range of 20-500 ng/zone. LOD and LOQ were 13.7 and 20.3 ng/zone, respectively.

J. Liq. Chromatogr. Relat. Technol. 39, 303-307 (2016). HPTLC fingerprinting of 27 white wines of three sorts on silica gel with ethyl acetate – formic acid – acetic acid – water 10:1:1:2 and on RP-18 with methanol – water – formic acid 50:50:1. Detection by heating at 100 °C for 3 min, followed by dipping into Natural Product reagent (1 g of diphenylborinic acid aminoethylester dissolved in 200 mL ethyl acetate) and after drying by dipping into PEG reagent (10 g of polyethylene glycol 400 dissolved in 200 mL dichloromethane). Qualitative identification under UV 254 nm and UV 366 nm.

Planta Medica 83(03/04), 239-244 (2017). HPTLC of flavokawin B (purity checked by TLC, followed by sulfuric acid detection) and a hexane maceration of Polygonum ferrugineum aerial parts on silica gel, twice in the same direction with n-hexane – ethyl acetate 4:1 (humidity 33 %). Detection of flavokawin B by densitometry at 366 nm (without derivatization). The hRf value was 53. The content of flavokawin B was 13.6 % in the hexane extract and 1.0 % in the dried plant.

Phytochem. Anal. 29, 5-15 (2018). TLC fingerprint of Ipomoea aquatica on silica gel with methanol – water from 1:1 to 9:1 (1) or methanol with 0.05 % trifluoroacetic acid – water with 0.05 % trifluoroacetic acid 1:1 (2). Detection by spraying with anisaldehyde sulfuric acid reagent. Detection under UV 254 nm, 366 nm, and for (2), white light (yellow bands at hRF 19 and 25). The post chromatographic visualization possibilities indicate the potential of TLC in qualitative fingerprint analysis.

Planta Med. 83, 912-920 (2017). Two subfractions of the ethanol extract of Aristolochia cordigera roots were mixed and submitted to preparative TLC on silica gel with hexanes (mixture of hexane isomers) – ethyl acetate 3:2 to isolate hyrtiosulawesine, aristolochic acids I and IV, sodium aristolochates I and IVa. The same method applied to a subfraction of the acetone extract of the roots revealed hyrtiosulawesine and 3,4-dihydro-hyrtiosulawesine.

Chromatographia 20, 109-111 (1985). Study of TLC behaviour of 28 phenolic compounds on semicrystalline stannic tungstate layers with various solvent systems. Detection by spraying with suitable chromogenic reagents. Dimethyl sulfoxide was found to act as self detector for a number of phenols. A number of binary, ternary and quarternary separations of bioanalytical and immuno-physiological importance have been achieved

Phytochemistry 28, 67-69 (1989). TLC of oleuropein, dimethyloleuropein and elenolic acid glucoside on silica with ethyl acetate - methanol - water 200:33:27. Visualization by spraying with p-toluene sulfonic acid (1%) and vanillin (2%) in ethanol.