Journal of Pharmacy Research 4(3), 643-644 (2011) TLC of doxofylline on silica gel with acetonitrile - methanol 7:3. The hRf of doxofylline was 66. Quantitative determination at 208 nm. The method was found to be linear in the range of 100-600 ng/band with an average recovery of 99.7 %. The results by TLC were comparable with results obtained by RP-HPLC.

J. of China Pharm. 26 (2), 150-154 (2012). Some health foods were illegally mixed with certain kinds of medicine which may harm the health of consumers. For example antidiabetics like glibenclamide, glipizide and gliclazide were illegaly added to health foods marketed for adjusting blood sugar. Presentation of TLC and UV methods for detection of these illegal additives. TLC on silica gel with chloroform – petroleum ether (60-90 ºC) – methanol – glacial acetic acid 8:14:1:1, detection at UV 254 nm. The methods were applied to three varieties of real life samples and the results showed no difference to those obtained by LC-MS.

J. Liq. Chromatogr. Relat. Technol. 36, 2387-2394 (2014). The image processing programs ImageJ and Sorbfil TLC Videodensitometer were compared to study direct antioxidant properties of compounds separated from extracts obtained from Medicago sativa. Comparable results were obtained based on built-in functions present in both programs for processing TLC videoscans.

J. Planar Chromatogr. 27, 287-293 (2014). HPTLC of ciprofloxacin HCl (1) and moxifloxacin HCl (2) in industrial wastewater on silica gel with methanol - ammonia - methylene chloride 11:7:4. Quantitative determination by absorbance measurement at 278 nm. The hRF values for (1) and (2) were 43 and 54, respectively. Linearity was in the range of 250-2500 ng/zone for (1) and 1000-50000 ng/zone for (2). The intermediate/interday/intra-day precisions were below 1 % (n=3). The LOD and LOQ were 110 ad 335 ng/zone for (1) and 101 and 305 ng/zone for (2), respectively. Recoveries were between 79.6 and 91.5 % for both (1) and (2). Results were comparable to a HPLC method.

J. Planar Chromatogr. 28, 241-247 (2015). TLC of (1) citicoline sodium in the presence of its (2) alkaline degradation products in pharmaceutical oral solution on silica gel with ammonia - ethyl acetate - triethylamine 12:7:1. Quantitative determination by absorbance measurement at 272 nm. The hRF value was 35 for (1) and 10 for (2). Linearity for (1) was between 0.6 and 2.2 µg/zone. The intraday precision was 0.2 % and interday precision was 1.2 % for (1). The LOD and LOD of (1) were 41 ng/zone and 237 ng/zone, respectively.

J. Liq. Chromatogr. Relat. Technol. 41, 83-86 (2018). TLC of gardenia blue in foods on RP-18 with 0.2 % trifluoroacetic acid – acetonitrile – ethanol 1:2:3 and on cellulose with acetone – 3-methyl-1-butanol – water 6:5:5. The hRf values of gardenia blue coloring were 35, 18 and 13 on RP-18 and 72, 56 and 48 on cellulose layer.

Anal. Chem. 109-111 (1984). TLC of coccidiostats (lasalocid, septamycin and monensin) on silica with ethyl acetate - dichloromethane 7:3. Detection by UV transferring the spots by a specially-designed probe. Identification by fast atom bombardment mass spectrometry without elution.

J.A.O.A.C. 68, 458-461 (1985). TLC of aflatoxins B1, B2 and M 1 on silica with chloroform - acetone 9:1 or ether - methanol - water 94:4.5:1.5 for aflatoxins 1B, B2, G1 and G2, and chloroform - isopropanol - acetone 85:5:10 for aflatoxin M1. Quantification by densitometry. Comparison with other methods. This method is more efficient with respect to recovery and shorter analysis time.