J. Planar Chromatogr. 19, 167-170 (2006). HPTLC of standards (cholesterol, oleic acid, triolein, methyl oleate, and cholesteryl oleate as marker compounds for free sterols, free fatty acids, triacylglycerols, methyl esters, and steryl esters, respectively, as well as cholesterol, phosphatidylethanolamine, phosphatidylcholine, and lysophosphatidylcholine for the analysis of polar lipids) and prepared samples of leeches on silica gel (with preadsorbent zone and prescored lanes) in a pre-saturated twin-trough chamber with petroleum ether - diethyl ether - glacial acetic acid 80:20:1 (for neutral lipids) and hexane - petroleum ether - diethyl ether - glacial acetic acid 50:25:5:1 (for steryl esters). Visualization by spraying with 5 % ethanolic phosphomolybdic acid solution and heating for 10 min at 110 °C. HPTLC of polar lipids on equal layer with chloroform - methanol - water 65:25:4. Visualization by spraying with 5% aqueous cupric sulfate solution and heating for 10 min at 140 °C. Quantification of neutral lipids at 610 nm and of polar lipids at 370 nm.

Talanta 60 (5), 945-953 (2003). TLC of linezolid from its alkaline degradation product on silica gel with isobutanol - ammonia 9:1. Quantitative determination by densitometric measurement at 244 nm. The proposed method and two other methods (based on spectrophotometry) were successfully applied to the determination of the drug in bulk powder, in laboratory prepared mixtures with its degradation product and in commercial tablets.

Planta Med. 70, 847-855 (2004). HPTLC and TLC of gymconopin A on silica gel and RP18 with the lower phase of chloroform - methanol - water 15:3:1.Visualization by spraying with 1 % cerium sulfate - 10 % aqueous sulfuric acid, followed by heating.

Acta Chrom. 17, 261-271 (2006). TLC and HPTLC plates have been compared on the basis of theoretical plate number, resolution, linearity, development time, and limit of sensitivity for analysis of a multicomponent analgesic tablet in the fluorescence quenching mode and analysis of a five-component dye mixture in the visible mode.

using high-performance thin-layer chromatography. J. AOAC Int. 89, 1467-1474 (2006). HPTLC of eugenol, luteolin, ursolic acid, and oleanolic acid on silica gel in a twin trough chamber with toluene - ethyl acetate - formic acid 35:15:1 at 25 °C and 40 % relative humidity. Quantitation in absorbance mode at 280 nm for eugenol, at 350 nm for luteolin, and at 530 nm for ursolic acid and oleanolic acid after derivatization with anisaldehyde-sulfuric acid reagent and heating at 105°C. The methods were validated for precision, repeatability, and accuracy.

J. Planar Chromatogr. 19, 454-462 (2006). HPTLC of enrofloxazine, norfloxazine, oxytetracycline, trimethoprim, sulfamethazine, sulfadiazine, and penicillin G/procaine on cyano phase with 0.05 M oxalic acid - methanol 81:19. Evaluation under UV light at 254 and 366 nm. Quantitative determination of TMP by absorbance measurement at 254 nm, and fluorescence measurement at 366 nm for the other compounds. The SPE-TLC determination was validated for linearity, precision, quantification, and detection limit.

Leg. Med. 8, 184-187 (2006). HPTLC on silica gel of cocaine urine samples submitted to solid phase extraction prior to derivatization (methylation) with diazomethane. For methylation samples were mixed with 100 µL of a solution freshly prepared by distillation of 2.14 g N-methyl-N-nitroso-p-toluenesulfonamide with 10 mL potassium hydroxide 96 % in ethanol and 30 mL ethyl ether, and kept at room temperature for 1 min to convert benzoylecgonine to cocaine. Development over 7 cm in a saturated chamber with ethyl acetate – cyclo hexane – ammonia 250:100:1. Detection by spraying with Dragendorff reagent (10 mL of 40 % m/v potassium iodide in water; 10 mL of 1 N solution of bismuth nitrate in glacial acetic acid; 80 mL of 10 % v/v sulfuric acid water solution; 2 g of resublimed iodine). The technique is capable to discriminate cocaine from interfering substances such as nicotine, caffeine and even cocaethylene in urine samples. The limit of detection was 100 ng of cocaine.

J. Liq. Chromatogr. & Relat. Technol. 30, 557-574 (2007). TLC of trigonelline (3-carboxy-1-methylpyridinium hydrochloride) and degradation products on silica gel with n-propanol - methanol - water 4:1:4 in a twin-trough chamber. Quantitative determination by absorbance measurement at 269 nm.