J. Planar Chromatogr. 16, 374-376 (2003). HPTLC of mannose and lactulose from urine on amino-modified silica gel with acetonitrile - water 7:3. After drying the plates were heated at 170°C for 20 min. Determination of lactulose by densitometry at 366 nm. Visualization after dipping into paraffin - hexane 1:2, and drying for 5 min at 100°C. The plate was immersed in three detection reagents: 1 L 0.1 mol/L AgNO3 and 200 mL acetone for 2 s, drying in air; 4 g NaOH in 4 mL water and 200 mL methanol for 2 s, drying for 2 min at 100°C; 20 g sodium thiosulfate dissolved in 100 mL water and 100 mL ethanol for 6 s, drying for 2 min at 100°C. Determination of mannitol by densitometry in absorbance mode at 660 nm.

Braz. J. Pharm. Sci. 49, 845-851 (2013). HPTLC of metoprolol (1) and hydrochlorothiazide (2) in human plasma on silica gel with chloroform - methanol - ammonia 18:2:1. Quantitative determination by absorbance measurement at 239 nm. The hRF values for (1) and (2) were 48 and 13. Linearity was in the range of 20-120 μg/zone for (1) and 2-12 μg/zone for (2). The intermediate/interday/intra-day precisions were below 5 % (n=3). The LOQs were 20 and 2 μg/zone for (1) and (2), respectively. Recoveries were between 70.6 and 84.9 %.

Proc. Intern. Symposium on TLC with special Emphasis on OPLC, Szeged, 65 (1984). OPLC (OPTLC) of cannabinoids on silica impregnated with DMF, with a) cyclohexane, b) toluene- dioxan 60:1. Detection by UV and with 0.2 % Fast Blue B reagent. Densitometry by absorbance.

Chinese J. Pharm. Anal. 8, 174-175 (1988)(Yaowu Fenxi Zazhi). TLC on silica with chloroform - methanol 30:6 after extraction with chloroform. Quantification by densitometry at 318 nm.

J. Planar Chromatogr. 2, 153-155, (1989). For doping control, extracts from urine are chromatographed on silica gel with ethyl acetate - methanol - NH3 25% 85:10:5. Post chromatographic derivatization (diazotation/coupling reaction) indicates the presence of oxprenolol. Densitometric quantification of the underivatized chromatogram by absorbance at 270 nm; determination limit, 50 µg/L. Ed.: see CAMAG application A-50.

J. Chromatogr. 575, 325-330 (1991). TLC of 7-hydroxycoumarin on silica with the lower phase of chloroform - water - ethyl acetate - acetic acid 48:24:12:1. Quantification by fluoro densitometry at 313 nm. Detection limit, 1 ng/mL. Comparison with a spectrofluorometric method.

J. Chromatogr. 615, 365-368 (1993). TLC of diazepam and its metabolites on silica with hexane - ether - acetic acid 80:10:10. Detection under UV 254 and 366 nm. Quantification of 2-amino-5-chlorobenzophenone and 5-chloro-2-methyl-aminobenzophenone by densitometry. Detection limits 0.5 ng/mL for both.

Analyst 119, 2737-2741 (1994). Description of Charm Test II receptor assays and TLC-bioautography for ß-lactams, sulfonamides, (dihydro)-streptomycin and erythromycin applied to 257 bovine muscle and kidney samples, and 215 porcine muscle and kidney samples. Quantification of penicillin G by HPLC, and of sulfonamides by TLC with fluorescence densitometry. Comparison of the analysis time, operating costs, etc., of different methods.