Research Journal of Pharmaceutical, Biological and Chemical Sciences 2(1), 108-110 (2011). TLC of flurbiprofen in raw material and tablet dosage form on silica gel with chloroform - methanol - 25 % ammonia 45:5:3. Quantitative evaluation by absorbance measurement at 247 nm. The method was linear in the range of 50-600 ng/band. The sample was subjected to different stress conditions and all the degradation products were well resolved from the main compound. The method can therefore be used for stability studies.

International Journal of PharmTech Research 2(4), 2438-2440 (2010). TLC of methanolic extracts of powdered dry fruits of Embelia ribes on silica gel with toluene - acetone - acetic acid 18:2:1. Detection with anisaldehyde-sulphuric acid reagent. The hRf values of the four major bands were 13, 27, 32, and 60.

Planta Med. 75, 132-136 (2009). Analytical and preparative TLC of 3’-hydroxy-4’,5,6,7-tetramethoxyflavone, 3’,5-dihydroxy-4’,6,7-trimethoxy-flavone (eupatorin), and 3’,4’,5,6,7-pentamethoxyflavonene (sinensetin) and methanolic plant extracts of Orthosiphon stamineus on silica gel with chloroform - ethyl acetate 7:3, and chloroform - ethyl acetate - acetic acid 30:70:1. Detection by spraying with anisaldehyde-sulfuric acid followed by heating.

Anhui Agri. Sci. Bull. 18 (1), 43-45 (2012). Soybean saponin is a component of soybean which has physiological activities and is composed of a variety of monomers. Presentation of a procedure for the separation of saponin extracted from soybean using ethanol. TLC on silica gel with 1) chloroform – ethyl acetate – methanol – water 15:40:22:10; 2) chloroform – ethyl acetate – methanol – water 3:4:2:1; 3) chloroform – ethyl acetate – methanol – water – acetic acid 3:4:2:1:0.05; 4) chloroform – ethyl acetate – methanol – water – acetic acid 30:80:40:20:1. Detection by spraying with 10 % sulfuric acid in ethanol and heating at 95 ºC until the zones are clearly visualized. Detection under UV 366 nm. The results showed that the mobile phase 1 gave the optimum separation of the soybean saponin.

Chinese J. Prac. Med. 7 (3), 251-252 (2012). Presentation of a procedure for preparation and quality control of Qichai Hugan pills. TLC of the extracts 1) for Astragalus mongholicus, on silica gel with the lower phase of chloroform - ethyl acetate - methanol - water 10:20:11:5, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C for 5 min and viewing under daylight and UV 366 nm; 2) for the root of Chinese thorowax, on silica gel with the lower phase of chloroform - methanol - water 7:3:1, detection by spraying with a solution of p-dimethylaminobenzaldehyde - sulfuric acid - ethanol 1:2:18 followed by heating at 105 °C and viewing under daylight; 3) for the fruit of Chinese wolfberry, on silica gel with toluene – ethyl acetate - formic acid 15:5:2, detection under UV 366 nm; 4) for the root of red-rooted salvia, on silica gel with chloroform - acetone - formic acid 60:5:2, detection by spraying with a solution of 2 % ferric chloride - 1 % potassium ferricyanide 1:1 and viewing under daylight.

J. Planar Chromatogr. 25, 445-449 (2012). HPTLC of bergenin in the stem-bark and roots of Mallotus phillippensis on silica gel with ethyl acetate - methanol - acetic acid - formic acid 16:2:1:1. Quantitative determination by absorbance measurement at 284 nm and by TLC-MS using the TLC-MS Interface. The hRf of bergenin was 49. Linearity was in the range of 100-600 ng/zone. Limits of detection and quantification were 29, 37 and 98 ng/zone, respectively. Intermediate intra-day/inter-day precision was 1.1 % (n=6). Recovery was between 96.6 and 98.9 %.

J. Strait Pharm. 24 (5), 36-38 (2012). Glucosamine sulfate is a kind of glycosaminoglycan, which, as a medicine, is able to stimulate cartilage cells, to supplement the cartilage matrix and to inhibit matrix metalloproteinase expression, thus to promote the repair of cartilage. For better quality control of the medicine a method is presented for the analysis of the related substances in glucosamine sulfate potassium chloride. TLC on silica gel with dichloromethane – methanol – ammonia 2:2:1, detection by exposure to iodine vapors for 30 min and evaluation in daylight. The LOD was 25 µg/mL. Investigation of the stability of the medicines by analysis of a sample submitted to typical stress conditions such as acid, alkali, water bath, hydrogen peroxide, high temperature and UV light. Degradation occurred only for the samples treated with alkali and in the water bath.

(Papaveraceae) tissues by TLC–in situ fluorography. J. Planar Chromatogr. 25, 358-360 (2012). TLC of berberine and sanguinarine on silica gel with n-butanol - water - ammonia 8:1:1. Detection by densitometry in fluorescence mode at 325 nm. The hRf of berberine and sanguinarine were 29 and 95, respectively.