J. Liq. Chromatogr. Relat. Technol. 31, 2019-2034 (2008). TLC of captopril, delapril, enalapril, lisinopril, amd moexipril on silica gel (impregnated by continous development with 10 % paraffin oil in n-hexane for 18 h) and RP-18 with various mobile phases. Detection under UV 254 nm. TLC is a fast and economical method for the determination of lipophilicity.

Biomed. Chromatogr. 6, 67-71 (1992). TLC of anti-ganglioside antibodies on silica with chloroform - methanol - 0.02% aqueous CaCl2 60:40:9. Detection by spraying with resorcinol - hydrochloric acid solution and heating at 110°C for 15 min. Transfer of gangliosides from the layer to hydrophobic polyvinylidene difluoride membranes, which is suitable for immunostaining.

J. Pharm. Res. 7(2), 126-128 (2008). HPTLC on silica gel with acetone - chloroform - ethyl acetate - methanol 6:6:6:1. Quantitative determination by absorbance measurement at 280 nm. The hRf value for telmisartan was 27 and for hydrochlorothiazide 45. The regression curve shows good linear relationship in the concentration range of 25.5 - 128.0 µg for hydrochlorothiazide and 81.6 - 408.0 µg for telmisartan. The content uniformity test was carried out as per the USP specification of the content uniformity test. The percent drug estimated from the marketed formulations were found to be in the range 99.3 and 100.5 for both drugs. The percent recoveries of drug carried out by the standard addition method was found to be 100.3 and 99.4 for hydrochlorothiazide and telmisartan respectively. The proposed method was found suitable for routine quality control and content uniformity tests.

Jap. J. Toxicol. Environ. Health 40, 101-110 (1994). TLC of 46 common pesticides in serum and gastric lavage solutions on silica with 4 developing systems and 3 detection methods. Detection of 24 pesticides at < 500 ng by viewing under UV radiation, of 12 ones by spraying with Dragendorff's reagent. Study of the recoveries by using spiked serum samples.

60th Indian Pharmaceutical Congress PA-195, (2008). HPTLC of trandolapril on silica gel with toluene - ethyl acetate - methanol - formic acid 5:16:2:1. The hRf value of trandolapril was 51. Trandolapril was subjected to different stress conditions like acidic and alkaline hydrolysis, oxidation, dry heat, wet heat, neutral condition and photodegradation. The degradation products were well resolved from the pure drug. Quantitative determination by absorbance measurement at 220 nm. Linearity was between 300-1800 ng/spot. The method was suitable for routine analysis of the drug in bulk and pharmaceutical dosage form.

Biomed. Chromatogr. 10, 225-227 (1996). TLC on silica with chloroform - acetone - ethyl acetate - methanol 136:64:4:1. Detection by spraying with ethylenediamine - methanol - potassium ferricyanide (1.5%) 1:3:1, incubating for 5 min at 60°C and in the dark at room temperature for 15 min. Quantification by fluoro densitometry at 415/>485 nm.

J. Planar Chromatogr. 22, 183-186 (2009). HPTLC of ethyl 8-oxo-5,6,7,8-tetrahydrothiazolo[3,2-a][1,3]diazepin-3-carboxylate (HIE-124) in plasma (with diazepam as internal standard) on silica gel with chloroform - ethyl acetate 4:1 with chamber saturation for 30 min. Quantitative determination by absorbance measurement at 265 nm. The limit of detection and quantification was 20 µg/L (40 ng/band) and 40 µg/L (80 ng/band), respectively.

J. Chromatogr. B 700, 283-285 (1997). TLC on RP-18 silica gel with methanol - water 4:1. Quantitation by fluorodensitometry at 313/>490 nm. Validation of the procedure by standard spiking. Comparison with HPLC.