J. Liquid Chromatogr. 6, 55-62 (1983). TLC of prostanoids (PGF2 alpha, PGE2; 15-keto-PGE2; 15-keto PGF2 alpha l3,14-dihydro-15-keto-GE2; 13,14-dihydro-15-keto-PGF2 alpha; tromboxane B2, arachidonic acid on silica with chloroform - methanol - acetic acid - water 95:5:1:0.2. Detection with iodine vapor. Radioassay.

Microtechniques. J. Planar Chromatogr. 2, 389-391 (1989). HPTLC separation of neutral lipids, cholesteryl esters, and phospholipids on silica with carbon tetrachloride - propanol - ethyl acetate - chloroform - methanol - ethanol - 43 mM potassium chloride 23:23:29:11:12 or chloroform - methyl acetate - ethyl acetate - methanol - hexane 2000:15:30:30:15 as mobile phases; detection by spraying with phosphomolybdic acid or copper(II)sulfate reagent followed by heating at 100-150 °C for 2-5 min. The methods described allows the determination of 21 different components within 15 min.

J. Planar Chromatogr. 5, 87-91 (1992). Comparison of ANS (8-anilo-1-naphthalene sulfonate, ammonium salt), rhodamine B, nile red, dichlorofluorescein with hematoporphyrin; visual comparison under UV 366 nm. Limits of (visual) detection (LOD) were 10-20 ng for the cationic surfactants, and 5 and 10 ng, respectively, for the phospholipids (sphingomyelin and lecithin) and cholesterol.

J. Planar Chromatogr. 10, 128-130 (1997). HPTLC of the lipid composition of a fresh-water snail. The major neutral lipids and their mean percentage net weight were triacylglycerols (0.107%), free sterols (0.496%), and free fatty acids (0.180%). The major phospholipids were phosphatidylcholine (0.451%) and phosphatidyl-ethanolamine (0.335%). HPTLC of neutral lipids on silica with petrol ether - ether - acetic acid 40:10:1 after equilibration for 10 min. Detection by spraying with 5% ethanolic phosphomolybdic acid and heating for 15 min 115°C. Quantification by densitometry at 700 nm. HPTLC of phospholipids on silica with chloroform - methanol - water 65:25:4. Detection as black spots by spraying the dried plate with a 10% solution of cupric sulfate in 8% phosphoric acid and heating at 160°C for 10 min. Densitometry at 370 nm.

J. Chromatogr. B, 757 (2), 317-324 (2001). Description of a non-radioactive micro-assay for the cyclic phosphodiesterase reaction catalyzed by Bacillus cereus phosphatidylinositol-specific phospholipase C, involving HPTLC on silica gel to resolve the substrate (myo-inositol 1,2-cyclic phosphate and the product (myo-inositol 1-phosphate), followed by detection with a lead tetraacetate-fluorescein stain. Quantitation by analysis of the fluorescent plate image with a commercial phosphoimager and associated software, for sample in the rage of 0.1 to 50 nmol.

Part II. Nicotinic acid and its esters. J. Liq. Chromatogr. Relat. Technol. 30, 2419-2433 (2007). TLC and HPTLC of nicotinic acid and methyl nicotinate, ethyl nicotinate, isopropyl nicotinate, butyl nicotinate, and benzyl nicotinate on RP-18 (prewashed with methanol) with methanol - water and dioxane - water in 10 % volume ratio steps from 100:0 to 0:100 in a chamber saturated for 30 min. TLC on aluminium oxide (prewashed with methanol) with acetone - n-hexane 1:4 provided the optimum conditions for complete separation. Quantitative determination by absorbance measurement at 254 nm.

Asian Journal of Chemistry 23(1), 469-470 (2011). Several herbal formulations were analyzed for gallic acid contents. Tablets were powdered, subjected to hydrolysis by refluxing with 10 % HCl, filtrated and extracted with chloroform. Acidic aqueous extracts were concentrated and the residue was taken up in methanol. TLC on silica gel with ethyl acetate - formic acid 85:11. Gallic acid was observed at an hRf value of 89. Densitometric quantification of gallic acid at 272 nm. The method was linear in the range of 100-3000 ng/band. The method was suitable for analysis of formulations without interference from excipients. Gallic acid contents of different tablet samples varied from 0.06-0.15 % w/w.

International Journal of Pharmaceutical Sciences Review and Research 2(2), 35-39 (2010). TLC on silica gel with methanol - chloroform 1:6. The hRf value was 38 and 68 for ramipril and telmisartan respectively. Densitometric evaluation at 210 nm. The method was linear in the range of 300-3000 ng/band and 500-4000 ng/band for ramipril and telmisartan respectively. The recovery was 98-102 %. The sample was subjected to different stress conditions (acid, base, oxidative, heat, photolytic) and all the degradation products were well separated from drug.