Asian J. Chem. 20(6), 4940-4942 (2008). HPTLC of paracetamol and tramadol hydrochloride on silica gel with ethyl acetate - toluene - ammonia 60:40:1. Absorbance measurement at 254 nm. The method was linear in the range of 0.1-0.5 µg/mL and 0.9-4.5 µg/mL for tramadol and paracetamol respectively. The recovery was 98.4-99.9 % for both compounds. The method was suitable for routine analysis.

Abstract No. F-311, 61st IPC (2009). HPTLC of levocetirizine dihydrochloride and montelukast sodium on silica gel with chloroform - methanol 93:7. The hRf value was 21 and 65 for levocetrizine and montelukast, respectively. Quantitative determination by absorbance measurement at 345 nm. The method was linear in the range of 100-350 ng/band for levocetrizine and 600-1100 ng/band for montelukast.

Abstract No. F-18, 61st IPC (2009). HPTLC of levocetirizine dihydrochloride and montelukast sodium in bulk and tablet dosage formulation on silica gel with toluene - ethyl acetate - methanol - 25 % ammonia 5:14:5:2. Both drugs were well resolved with hRf values of 31 for levocetirizine and 44 for montelukast. Quantitative evaluation at 231 nm. The method was linear in the range of 500-2500 ng/band for levocetirizine and 1000-5000 ng/band for montelukast. Both drugs were also analysed by HPLC on RP18 column and results were comparable with HPTLC.

Analytical Chemistry - An Indian Journal 8(3) (2009) (without page number). A TLC method has been developed for determination of lacidipine in presence of its photodegradates. TLC on silica gel with toluene - acetone - methanol - 25 % ammonia 30:10:3:1. Densitometric evaluation at 284 nm. The chromatographic method was compared with a derivative spectrophotometric method and vierordt’s method and was found suitable for analysis of lacidipine in bulk drug as well as in dosage form.

J. Chromatogr. A 1218 (19), 2732-2736 (2011). A review on the sustainability and robust advantages of TLC and the parameters which are critical to the successful performance of product quality assessments in resource limited areas including field applications. The training required for successful performance of HPTLC assessments is much lower than that of other technologies with comparable reproducibility such as HPLC, because of the robustness and ease of use for HPTLC. Presentation of some of the successful applications of planar chromatography in resource limited countries. In practice in finished pharmaceutical products there are generally few active ingredients which are assessed making the HPTLC adequate for these analyses.

J. of Food Sci. & Biotechnol. 27(5), 129-133 (2008). TLC of gentamicin on silica gel with the lower phase of chloroform – methanol – 25 % ammonia 5:4:3 and after chamber saturation with the upper phase of the developing solvent. Detection by exposure to iodine vapor. Identification by comparison of the hRf values with the standards of the main components of gentamicin (Cl, C1 and C2). The results were compared with results obtained by HPLC and good agreement between both methods was found.

J. Liq. Chromatogr. Relat. Technol. 34, 864-887 (2011). Comparison of a one dimensional TLC-MS separation and fingerprinting method with a two-dimensional TLC-LC-MS method, when applied to the analysis of phenolic acids and flavonoids from Salvia lavandulifolia. TLC directly or indirectly coupled with mass spectrometric detection proved very useful in the analysis of the phenolic acid and flavonoid fraction selectively extracted from botanical material.

J. Planar Chromatogr. 25, 65-71 (2012). HPTLC of dapsone in presence of its oxidative degradants on silica gel with acetate - toluene 1:1. Quantitative determination by absorbance measurement at 289 nm. Linearity was in the range of 0.5-6.0 µg/zone. Recovery was 99.4 %. The method showed comparable results to a validated HPLC method.