J. Planar Chromatogr. 18, 437-442 (2005). HPTLC of quercetin and kaempferol in horizontal chambers on silica gel (prewashed with methanol) with four mobile phases, e.g.1,4-dioxane - toluene - 85 % acetic acid 6:24:1 or on cellulose with five mobile phases. Evaluation under UV light at 254 and 366 nm before and after spraying with a 2 % solution of zirconium (IV) dichloride oxide in methanol. Quantitative determination by absorbance measurement at 373 for quercetin and at 347 nm for kaempferol.

J. Planar Chromatogr. 18, 85-88 (2005). 11 HPTLC of fenoxaprop-p-ethyl and degradation products on silica gel (prewashed with methanol - chloroform 1:1 and activated at 110 °C for 30 min) in a twin-trough chamber with toluene - dichloromethane 7:3. Visualization on irradiation with an UV lamp at 236 nm. Quantitative determination by absorbance measurement at 236 nm.

J. Planar Chromatogr. 18, 155-159 (2005). TLC of repaglinide on RP-8 with acetonitrile - phosphate buffer pH 6.0 3:2. Quantitative determination by absorbance measurement at 225 nm. Calibration in the range of 0.6-3.6 µg was linear with a good correlation coefficient (r = 0.998 +/- 0.001). Limits of quantitation and detection were 0.27 µg and 0.08 µg, respectively.

Abstract DP-41, IPC (2005). HPTLC of solanesol in n-hexane extracts of shade dried and freeze dried leaves of Solanum tuberosum, S. trilobactum, S. xanthocarpum, S. nigrum, and S. toruum on silica gel with chloroform - ethanol 48:1. Quantitative determination by absorbance measurement at 254 nm. Solanum tuberosum contained the highest amount of solanesol out of the 5 analyzed species.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27(4), 483-485 (2005). TLC of tanshinone llA extracted from the title Chinese traditional patent medicine on silica gel with benzene - ethyl acetate 19:1. Quantitative determination by densitometry at 470 nm. Also determination of the compound by HPLC.

J. Planar Chromatogr. 18, 57-60 (2005). HPTLC of the organic components of composite modified double-base (CMDB) propellants (with nitroglycerine, carbamite, diethyl phthalate, dibutyl phthalate, 2-nitrodiphenylamine as standards) on silica gel with chloroform - cyclohexane 7:3. Detection under UV light at 254 nm. Densitometric scanning in absorbance mode at 210 nm. Comparison of the UV spectra of the separated compounds with those of the standards.

J. Planar Chromatogr. 19, 161-166 (2006). HPTLC of 16 amino acids on cellulose in a horizontal chamber with aqueous mixtures of 2-propanol, acetonitrile, and tetrahydrofuran in the range of 60-90 % (10 % increments). Acetic acid (at a concentration of 1%) was only added to the mobile phases containing 2-propanol. Best separation was achieved with tetrahydrofurane - water 17:3; acetonitrile - water 4:1; and 2-propanol - water - acetic acid 89.5 - 9.5 - 1 respectively. The adsorbed solvent was removed before repeating the development process. Visualization by spraying with ninhydrin solution and heating at 105 °C for 1.5-2 min. Densitometric evaluation by absorbance measurement at 415 nm.

Chromatographia 64 (1-2), 101-104 (2006). TLC of metformin and glyburide in three different formulations of Glucovance®, on silica gel with water - methanol - ammonium sulfate 4:2:1. Rf value of metformin was 0.43 and of glyburide 0.64. Quantitative determination by absorbance measurement at 237 nm. The linear regression data for the calibration plot showed a good relationship with r = 0.99581 and 0.99982 for metformin and glyburide, respectively. The method was validated for precision and recovery. The limits of detection and quantification were 25 and 84 ng/spot for metformin and 12 and 41 ng/spot for glyburide, respectively. Stability study has been carried out for samples and standard solutions.