J. Planar Chromatogr. 9, 435-438 (1996). TLC of several crown ether derivatives of tetraphenylporphyrin (18-crown-6, 15-crown-5, 12-crown-4, 14-crown-4, -p- and -o-isomers ) on silica, alumina, and cellulose with different organic mobile phases in different proportions. Detection via the intense color of the porphyrins, examination under UV 254 or 305 nm.

Acta Chrom. 12, 226-233 (2002). TLC of porphyrins and their complexes with Cu (II) and Ni (II) on silica gel (activated at 120 ºC for 30 min) with carbon tetrachloride – chloroform 1:1 after chamber saturation for 30 min. After drying the plates at RT, spots were visible on the plates. The effects of Cu (II) and Ni (II) cations on the separation of hydroxy and alkyloxy tetraphenylporphyrin derivatives were determined.

J. Chinese Herb Med. (Zhongcaoyao) 21, 155-156 (1990). TLC of isatin and indigotin on silica with benzene - chloroform - acetone 5:4:1. Quantification by densitometry at 536 nm for isatin, and 602 nm for indigotin.

Scientia Pharmaceutica 56, 257-262 (1988). TLC of pyridines on silica, impregnated with 5% 1-octanol solution in ether with sodium acetate-veronal buffered at pH 7. 4 with 30% acetone.

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.