Chromatographia 69(3-4), 351-356 (2009). TLC of piroxicam and its degradation products on silica gel with ethyl acetate – toluene - butylamine 2:2:1. Quantification by absorbance measurement at 360 nm. It was found that piroxicam decomposes to produce pyridine-2-amine and 2-methyl-2,3-dihydro-4H-1?6,2-benzotiazin-1,1,4-trione, based on 1H NMR and LC–MS–MS qualification data.

J. Liq. Chromatogr. Relat. Technol. 31, 752-762 (2008). TLC and HPTLC of nine dipeptides (gly-gly, ala-gly, pro-leu, pro-asp, pro-gly, leu-pro, ala-pro, phe-pro, val-pro) on silica gel with ethanol - dichloromethane 2:1 and methanol - dichloromethane 1:1 in a horizontal chamber saturated for 20 min. Detection by spraying with sodium azide and starch solution (25 mL aqueous starch solution, containing 2.5 g starch, was added to 20 mL aqueous sodium azide solution containing 2 g sodium azide, the mixture was adjusted to pH 5.5 with 0.1 mol/L hydrochloric acid and diluted to 50 mL with water to obtain 4 % and 5 % solution for sodium azide and starch, respectively). All solutions were prepared fresh daily. The limit of detection was 2-200 pmol/spot for the iodine azide procedure, 1-100 pmol/spot for iodine, 20-2000 pmol/spot for UV 254 nm, and 40-1000 pmol/spot for spraying with ninhydrine and drying at 110 °C .

Chromatographia 69 (1-2), 157-161 (2009). TLC of amlodipine besylate (AML) and valsartan (VAL) on silica gel with toluene - methanol - acetic acid 70:30:1. Quantification by absorbance measurement at 244 nm. Linearity was between 100 - 600 ng/spot for AML and 1600 - 9600 ng/spot for VAL. For AML the RSD of intra-day precision was 1.5 - 1.8 % and of inter-day precision 1.2 - 2.0 %. For VAL the RSD of intra-day precision was 0.1 - 0.4 % and of inter-day precision 0.2 - 0.5 %. Accuracy was 98.3 % for AML and 98.7 % for VAL.

Anal. Chem. 74, 2653-2662 (2002). This review covers the literature of TLC/HPTLC found in Chemical Abstracts and ICI Web of Science from November 1, 1999 to November 1, 2001. Review Contents: 1. History, Student Experiments, Books, and Reviews; 2. Theory and Fundamental Studies; 3. Chromatographic Systems (Stationary and Mobile Phases); 4. Apparatus and Techniques; 5. Detection and Identification of Separated Zones; 6. Quantitative Analysis; 7. Preparative-Layer Chromatography and Thin-Layer Radiochromatography 8. Literature Cited.

J. Chromatogr. A 1110 (1-2), 214-221 (2006). Presentation of a rapid, simple and inexpensive method for the analysis of fructooligosaccharides as feed additives (prebiotics) in complicated biological samples with minimal pre-treatment. TLC of fructooligosaccharides in dietetic products and in samples from intestinal tract of monogastric animals on silica gel (impregnated with sodium acetate) with butanol - ethanol - water 5:3:2 with chamber saturation. Detection by spraying with diphenylamine - aniline - phosphoric acid in acetone. Quantitative determination by absorbance measurement at 370 nm.

J. Planar Chromatogr. 22, 211-215 (2009). TLC of fat soluble vitamins (ergocalciferol, cholecalciferol, (+/-)-alpha-tocopherol, tocopherol acetate, retinol, retinol acetate, retinol palmitate, menadione, and phytonadione) on RP-8 and RP-18 (prewashed with methanol) with methanol - water in different volume proportions, with chamber saturation for 20 min at ambient temperature. Determination of hRf values by densitometry. Linear relationships were obtained between the RM values of the fat-soluble vitamins and the volume fraction of methanol in the mobile phase.

J. Chinese Trad. Patent Med. 30 (12), 1997-1800 (2008). TLC of Hongjinchan granule extracts on silica gel with 1) n-butanol - glacial acetic acid - water 7:1:2; and 2) chloroform - ethyl acetate 7:3. Detection 1) under UV 365 nm; 2) by spraying with 2 % iron(III) chloride in ethanol; 3) by exposure to ammonia vapor for approx. 15 min. Identification by comparison with the standards of the component drugs. Quantification of scutellarin by HPLC.

Indian Drugs 46(2), 109-112 (2009). HPTLC of chloroform extracts of stem bark of Terminalia alata and Terminalia arjuna on silica gel with chloroform - methanol 9:1. Arjunolic acid and maslinic acid were used as marker compounds. Detection by treatment with vanillin-sulphuric acid reagent. Quantitative determination by absorbance measurement at 254 nm. The fingerprint profile along with other physico-chemical data helped in the correct authentification and standardization of both plant species.