J. Chinese Herb. Med. (Zhongcaoyao) 24, 339-340 (1993). TLC of tetrandrine, fangchinoline and cyclanoline on silica with chloroform - acetone 1:1. Detection by spraying with Dragendorff's reagent.

J. Planar Chromatogr. 8, 155-156 (1995). HPTLC of the 15S and 15R forms of the title prostaglandin on silica with mixtures of dichloromethane and acetone in ratios ranging from 3:1 to 1:1. Detection by immersion into a phosphomolybdic acid solution (10%) and heating at 105 °C for 10 min. Quantification by densitometry at 750 nm (absorbance). Comparison of HPTLC with HPLC. The author considers HPLC 100fold more expensive than HPTLC.

J. Chromatogr. B 707, 347-350 (1998). TLC on silica gel with toluene - acetone - formic acid 60:39:1. Quantitation by radioactivity assay using a phosphor imager. Comparison to HPLC method, giving a correlation coefficient of 0.978 between the two methods.

Indian J. Pharm. Sci. 66 (3), 283-286 (2004). TLC of lamotrigine in its tablet dosage form on silica gel with acetone - toluene - ammonia 14:6:1. Quantitative determination by absorbance measurement at 312 nm. The method was quantitatively evaluated in terms of linearity, accuracy, precision, repeatability, and specificity to prove its utility in the analysis of tablet dosage form.

IPC 56th 2004, Abstract No. GP-11. Stability indicating HPTLC determination of indapamide in tablets on silica gel with toluene - methanol 7:3. Quantitative determination by scanning at 246 nm. Optimization of experimental parameter such as band size, chamber saturation, and slit width. The method was linear in the range of 1.4 - 3.72 g, recovery was 100.01 %. The drug was subjected to stress conditions according to ICH guidelines, degradation products were separated from the pure drug. The method was validated for accuracy, precision, linearity, and specificity.

J. Planar Chromatogr. 19, 4-9 (2006). TLC and HPTLC of 2-thioguanidine and 6-mercaptopurine on silica gel with methanol in a horizontal DS-chamber. Spots were visualized with a freshly prepared solution of sodium azide and starch, adjusted to a pH within the range 5.5-6.0, and then exposed to iodine vapor. The thiols became visible as white spots on a violet-gray background. The iodine-azide reagent enabled detection of quantities in the range 1-80 pmol per spot.

Indian Drugs 42 (7), 465-468 (2005). HPTLC of tizanidine and diclofenac in tablet formulations on silica gel with chloroform - methanol 4:1. Quantitative determination by absorbance measurement at 230 nm. Cetrizine was used as an internal standard. The solvent system was found to give compact spots for diclofenac sodium (Rf value 0.86), tizanidine (0.26) and cetrizine (0.52). The method was validated for linearity, accuracy and precision. Linearity for tizanidine was 0.6-1.4 µg/mL, and for diclofenac sodium 7.5-17.5 µg/mL . The mean recoveries obtained for tizanidine and diclofenac sodium were 98.73 % and 99.70 %, respectively. The proposed method was accurate, precise, selective and rapid for simultaneous estimation of tizanidine and diclofenac sodium in tablets.

Acta Chrom. 13, 154-160 (2003). Samples of nicotine were exposed to air and UV light and the products formed (nicotyrine, cotinine, and trans-3'-hydroxycotinine) were separated by TLC on RP-18 with acetonitrile – water 22:3 in a horizontal chamber. Visual evaluation under UV 254 nm, and under white light after derivatization with Dragendorff’s reagent. Quantitative determination by absorbance measurement at 260 nm. GC–MS analysis was performed to confirm the identities of the nicotine transformation products.