J. Chinese Trad. Patent Med. (Zhongchengyao) 10, 807-809 (2004). TLC on silica gel plates with 1) chloroform - methanol - water 13:7:2, 2) chloroform - acetone - formic acid 25:10:4. Detection 1) by spraying with 10 % H2SO4 in ethanol and heating at 105 ºC, 2) by ammonia vapor and under UV 365 nm. Identification by fingerprint techniques. Quantitative determination of salidroside by HPLC.

J. Liq. Chrom. Rel. Technol. 27, 2039-2045 (2004). HPTLC of cholesteryl oleate, methyl oleate, triolein, oleic acid, and cholesterol on pre-washed silica gel with petroleum ether - diethyl ether - glacial acetic acid 80:20:1 in a twin-trough chamber with saturation. Detection with phosphomolybdic acid reagent. Quantitative determination at 610 nm.

J. AOAC Int. 86, 935-940 (2003). TLC of indapamide (4-chloro-N-(2-methylindolin-1-yl)-3-sulfamoylbenzamide), its degradation product, and related substance 2-methylnitrosoindoline on silica gel using toluene - ethyl acetate - glacial acetic acid 69:30:1 after pre-saturation for 1 h. Detection under UV light at 254 nm. Quantitative determination at 424 nm. Limit of detection 0.11 µg/spot. The method was validated according to the guidelines of the USP.

J. Planar Chromatogr. 17, 154-156 (2004). HPTLC of pioglitazone hydrochloride ((±)-5-{p-[2-(5-ethyl-2-pyridyl)-ethoxy]benzyl}-2,4-thiazolidinedione hydrochloride) and glimepiride (trans-3-ethyl-2,5-dihydroxy-4-methyl-N-[2-[4-[[[[(4-methylcyclohexyl)amino]-carbonyl]amino]sulfonyl]phenyl]ethyl]-2-oxo-1H-pyrrole-1-carboxamide)and atorvastatin as internal standard on silica gel after pre-washing in a twin-trough chamber after pre-saturation with toluene - methanol - ethyl acetate - formic acid 70:20:15:0.1. Evaluation by densitometry at 235 nm.

J. Planar Chromatogr. 17, 300-304 (2004). TLC of essential oils and thymol, carvacrol, geraniol as standards and streptomycin and gentamycin as positive controls on silica gel with toluene - ethyl acetate 93:7. Detection with ethanolic vanillin sulfuric acid. Quantitative determination at 500 nm. For bioautography the developed plates were dipped for 10 s in approximately 50 mL culture medium containing the test organism followed by drying for 2 min. After storage of the plates at 26 - 28 °C for 17 h they were dipped for 10 s in an aqueous solution (0.1 g / 60 mL) of 3-{4,5-dimethylthiazol-2-yl}-2,5-diphenyltetrazolium bromide (MTT) the layers were incubated at 28 °C for 2 h and then dipped in 70 % ethanol and dried at room temperature.

J. Planar Chromatogr. 17, 365-368 (2004). HPTLC of deltamethrin, fenpropathrin, bifenthrin on silica gel (prewashed with chloroform - methanol 1:1) with toluene - petroleum ether 8:3 or cyclohexane - chloroform 1:1 in a twin-trough chamber and in a horizontal chamber. Quantitative determination by densitometric scanning at 254 and 366 nm.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 27(1), 94-96 (2005). HPTLC on silica gel with 1) n-butanol - glacial acid - water 19:5:5; 2) petroleum ether (30-60 ºC) - formic acetate - formic acid 15:5:1; 3) chloroform - ethyl acetate - methanol - formic acid 200:25:50:1. Detection 1) by spraying with 0.5 % ninhydrin in ethanol; 2) under UV 365 nm; 3) by spraying with vanillin - H2SO4 solution and heating. Identification by fingerprint technique. Quantification of emodin by densitometry at 440 nm. Validation of the method by investigation of linearity (0.1 µg - 0.5 µg, r = 0.998); precision (RSD = 3.8 %, n = 15 within plate and RSD = 3.2 %, n = 5 plate to plate); reproducibility of five time assay towards the same sample (RSD = 4.4 %); standard addition recovery (99.5 %, RSD = 2.2 %, n = 5). The results for some real life samples are given.

IPC 56th 2004, Abstract No. GP-8. Simultaneous HPTLC determination of ranitidine and domperidone on silica gel with methanol - 1, 4-dioxan 2:3. Quantitative determination by densitometric scanning at 282 nm. Rf values were 0.33 for ranitidine and 0.78 for domperidone. Linearity range was 0.5 – 2.5 mg/mL for both of the drugs. The recovery was in the range of 100.25 – 100.78 %. The method is suitable for the analysis of both drugs in combined dosage form.