J. Planar Chromatogr. 8, 143-144 (1995). HPTLC of diazepam, nitrazepam, oxazepam, methaqualone, heroin, on silica with hexane - methanol - acetone 15:3:2, benzene - acetone - ethanol 8:1:1, and chloroform - acetone 8:2. Detection by inspection under UV 254 nm and spraying with Dragendorff's reagent. Quantification by comparison against standards.

CBS 92, 1-3 (2004). HPTLC of cinchocaine hydrochloride from suppositories on silica gel with 1-butanol - toluene - ethanol - water - 100 % acetic acid 10:8:7:4:1 over 30 mm followed by heating at 110 °C for 10 min. Quantitative determination by fluorescence measurement at 313/>400 nm.Precision is 2 % and recovery 101 %.

Acta Chromatographica 9, 72-78 (1999). HPTLC of dextromethorphan hydrobromide (DH) and clemastine fumarate (CF) on silica gel (prewashed by chromatography with dichloromethane - methanol 1:1) with ethyl acetate – methanol – ammonia 17:1:2 for DH, and dichloromethane – methanol – ammonia 90:10:1 for CF, both with chamber saturation. Quantitative determination by absorbance measurement at 225 nm (DH) and 216 nm (CF). The hRf value of DH was 55, and of CF 62. Selectivity regarding matrix was given. Linear correlation coefficient values were in the range of 0.990–0.999. The amount of DH in the analyzed caplets and gelcaps ranged from 100 to 114 % of the label values, precision (% RSD) ranged from 1.2 to 1.9 %, and recovery of spiked samples averaged 99.4 %. For CF, tablets assayed at 99.0–103 % relative to the label value, precision (% RSD) was 2.2 %, and recovery from a spiked sample was 97.9 %.

by HPTLC. 62nd Indian Pharmaceutical Congress Abstract No. F-248 (2010). TLC of harmine in stem bark of Symplocos racemosa Roxb. on silica gel with toluene – ethyl acetate – methanol 3:1:1. Quantitative determination by absorbance measurement at 324 nm. The linearity of the method was in the range of 100-500 ng/band.

62nd Indian Pharmaceutical Congress Abstract No. F-251 (2010). TLC of levocetirizine and phenylpropanolamine on silica gel with methanol – ethyl acetate – toluene – ammonia 15:4:5:2. Quantitative determination by absorbance measurement at 210 nm. The hRf value was 30 and 60 for levocetrizine and phenylpropanolamine, respectively. The linearity was in the range of 45-270 ng/band for both drugs.

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.

Acta Pharmaceutica Hungarica 58, 247-265 (1988). Study of the determination of hydrophobic constants by TLC. N-Heterocyclic substances were used as model mixtures.

J. Chromatogr. 553, 459-466 (1991). Study of OPLC retention behavior of minoxidil and its intermediates using silica gel layers impregnated with tricaprylmethylammonium chloride (TCMA). Investigation of the influence of the concentration of TCMA adsorbed on the silica gel, and of the pH and the ionic strength of the eluents on the retention of the solutes, etc.