J. Planar Chromatogr. 19, 378-382 (2006). TLC and HPTLC of myricitrin on silica gel, pre-washed with methanol, in a horizontal chamber with chloroform -methanol - formic acid - water 10:4:1:0.95. Quantitative determination by absorbance measurement at 254 nm.

J. Liq. Chromatogr. Relat. Technol. 28, 463-476 (2005). TLC of 10 pesticides (triadimenol, metazachlor, triadinefon, quinoxyfen, fenoxycarb, propaquizafob, piperonyl butoxide, quizalofop-P, buprofezin, oxyfluorfen) on silica gel with ethyl acetate - diisopropyl ether 1:9. Evaluation under UV 254 nm.The separated eight fractions were separated with NP and RP systems on RP-18 W and on cyano phase. Evaluation by densitometry and video densitometry. In addition preparative TLC on silica gel with a non-aqueous eluent.

Indian J. Pharm. Sci. 68 (6), 790-793 (2007). HPTLC of carvedilol in bulk drug and pharmaceutical formulations, on silica gel with ethyl acetate - toluene - methanol 2:8:7. Quantitative absorbance measurement at 242 nm. The hRf value of carvedilol was 65. The method was found to be linear over the concentration range of 50-300 ng/spot with recovery of 98.3-101.1%.The method was validated for accuracy and precision. Comparison with an HPLC method showed the HPTLC method to be advantageous regarding sample throughput.

J. Liq. Chromatogr. Relat. Technol. 29, 2059-2069 (2006). TLC of S-(+)-ibuprofen, S-(+)-naproxen, and R,S-(+/-)-2-phenylpropionic acid on silica gel (prewashed with methanol - water 9:1 and impregnated with a 0.03 mol/L solution of L-arginine in methanol by dipping for 2 s at 22 +/- 2 °C) with acetonitrile - methanol - water 10:2:3 for naproxen and 20:4:3 for 2-phenylpropionic acid. Both mobile phases contained several drops of acetic acid to fix the pH at 4.8. Densitometric evaluation at 210 nm.

J. Planar Chromatogr. 20, 411-417 (2007). HPTLC of sucralose in dietetic products on silica gel impregnated with 0.1 M dipotassium hydrogen phosphate solution, and on amino phase with acetonitrile - water 17:3. Also a mixture of sucralose, sucrose, glucose, fructose was separated on amino phases with acetonitrile - water 3:1. Detection by dipping in 2-naphthol sulfuric acid reagent and aniline diphenylamine ortho-phosphoric acid reagent, followed by heating at 120 °C. Post-chromatographic derivatization on aluminium-backed amino plates was performed by heating the plate 190 °C for 20 min. Evaluation under UV light at 366 nm. For fluorescence enhancement the amino plate was dipped into a 1:2 solution of paraffin in n-hexane. Densitometric quantification by fluorescence measurement at 366 nm and by absorbance measurement at 500 and 405 nm.

J. Planar Chromatogr. 20, 227-230 (2007). When the components of a reaction mixture cannot be quantified by UV-visible spectrophotometry because of overlapping of their absorption bands, the components can be separated and quantified by spectrodensitometric thin-layer chromatography (SDTLC). As example serves an aminolysis reaction mixture. TLC of imidazolidine and 1-(p-chlorophenyl)-2-phenyl-3-methylimidazoline on silica gel in a twin-trough chamber saturated for 5 min with chloroform - methanol 4:1 for the first development to a distance 55 mm, and after drying development with benzene to a distance of 65 mm. Densitometric scanning at 260 nm in absorption mode.

J. Sep. Sci. 30, 2092-2096 (2007). HPTLC of flavonoids in Bauhinia variegata, Bacopa monnieri, Centella asiatica, Ginkgo biloba, Lonicera japonica, Rosa bourboniana, Rosa brunonii, and Rosa damascena on RP-18 with two-fold development with water (5 % formic acid) – methanol 7:3 and water (5 % formic acid) – methanol 1:1 as mobile phases. Quantitative determination by absorbance measurement at 280 nm. The hRf values of apigenin (1), quercetin (2), rutin (3), luteolin (4), and quercitrin (5) were 19, 29, 34, 51, and 63, respectively. Linearity was between 150 and 800 ng/zone for (1) and (3) and between 200 and 1000 ng/zone for (2), (4) and (5). The limits of detection and quantification for (1) – (5) were 30 and 166 ng/zone, 40 and 200 ng/zone, 20 and 150 ng/zone, 40 and 200 ng/zone, and 40 and 200 ng/zone, respectively. Recovery was between 97 and 99.8% for (1) – (5).

J. Planar Chromatogr. 20, 293-301 (2007). TLC of candesartan, eprosartan, losartan, telmisartan, and valsartan on silica gel, aluminum oxide, amino-, cyano-, and diol-phase in a horizontal chamber in sandwich technique. Diol-phases were developed with hexane - isopropanol - formic acid 40:60:1, cyano-phases with hexane - dioxane - formic acid 30:70:1. Detection and quantification at 254 nm.