J. Planar Chromatogr. 20, 231-233 (2007). TLC of cadaverine and ornithine on calcium sulfate (and silica gel) with methanol. Detection by spraying with 0.2 % ethanolic solution of ninhydrin and then heating the plates at 110 °C for 15 min. Quantitation by scraping the spot from the plate and measuring the absorbance at 550 nm. The lower limit of detection was found to be 0.75 µg/zone of ornithine.

Journal of Pharmacy Research 3(8), 1997-1999 (2010). TLC on silica gel (plates pre-washed with methanol) with methanol - water - acetic acid 80201. The hRf value of ranitidine HCl was 27 and of dicyclomine HCl was 67. Derivatization by exposure to iodine vapor. Densitometric evaluation at 410 nm. The method was linear in the range of 400-2400 ng/band for dicyclomine hydrochloride and 150-900 ng/band for ranitidine hydrochloride. The mean recovery was 98.8 ± 0.5 % for ranitidine HCl and 99.1 ± 0.8 % for dicyclomine HCl.

J. Planar Chromatogr. 26, 354-357 (2013). HPTLC of free duloxetine in human serum on silica gel with acetone - benzene - triethylamine 1091. Quantitative determination by absorbance measurement at 235 nm. The hRf of duloxetine was 32. Linearity was between 35 and 140 ng/zone. LOD and LOQ were 10 and 35 ng/zone. Recovery (by standard addition) was found to be 92.9-97.6 %. Intra- and inter-day precision values were below 1.8 % and 5.7 %, respectively.

Anal. Chim. Acta 199, 77-83 (1987). TLC of the product of the reaction between caprolactam and p-(N,N-dimethylamino)benzene-p’-azobenzoyl chloride on silica with benzene - ethyl acetate 123. Determination of caprolactam by adsorptive stripping voltammetry. Detection limit 0.2 µg/mL.

J. Planar Chromatogr. 3, 511-514 (1990). Chromatography of aromatic amines on silica impregnated with picric acid has been performed using cyclohexane - benzene mixtures as eluents. The best results were obtained with cyclohexane - benzene 15 on silica impregnated by development with a solution of 1.0% picric acid in methanol. Mutual separation of carbazole, p-phenylenediamine, and p-toluidine from synthetic mixtures containing variable amounts of the compounds has been realized. The method is rapid, and useful for separation amines at microgram as well as milligram levels.

J. Planar Chromatogr. 8, 216-218 (1995). TLC of p-dimethylaminobenzaldehyde, p-dimethylaminocinnamaldehyde, diphenylamine, carbazol on silica, alumina, cellulose, and a 41 mixture of cellulose and silica with various aqueous and nonaqueous mobile phases.

Sz. Nyiredy, A. Kakuk (eds.) Planar Chromatography 2000, Lillafüred, Hungary, 24-26 June 2000, Res. Inst. for Med. Plants, p. 173-181. After prechromatographic derivatization with dansyl chloride OPLC of biogenic amines on HPTLC silica gel with n-hexane - n-butanol - triethylamine 90010081 and n-hexane - n-butanol 41. Densitometry at 305 nm. The main biogenic amines in red wines were putrescine (41%), agmatine (33%), tyramine (13%) and spermidine (<10%), in white wines were putrescine (37%), tyramine (36%), agmatine (20%) and cadaverine (<10%). OPLC of resveratrol on TLC silica gel with chloroform - methanol 252.

J. Planar Chromatogr. 17, 431-434 (2004). HPTLC of six heterocyclic amines (2-amino-9H-pyrido[2,3-b]indole, 2-amino-3-methyl-9H-pyrido[2,3-b]indole, norharmane, harmane, 2-aminodipyrido[1,2-alpha3’,2’-d]imidazole, 2-amino-6-methyldipyrido[1,2-alpha3’,2’-d]imidazole) on silica gel by multiple development with diethylether. The mobile phase was selected by using a practical and systematic four-level optimization scheme based on the solvent classification system according to Snyder and the PRISMA model of Nyiredy et al. Quantitative determination by fluorescence measurement at 366/>400 nm was performed immediately after development.