J.A.O.A.C. 69, 499-503 (1986). TLC determination of uric acid on cellulose with methanol - butanol - water 4:4:3; to 30 ml of this solution 1 ml of acetic acid is added. Observation under UV 254 nm; spraying with a mixture of 18 ml water, 1 ml 1 % K (Fe(CN)6 and 1 ml 2 % FeCl3 (mixed immediately before use). Detection limit 5-10 ng uric acid.

J. Chromatogr. 668, 485-494 (1994). Determination of the lipophilicities and specific hydrophobic surface aceas of 16 bioactive heterocyclic compounds by reverse-phase TLC on silica, impregnated with hexane-paraffin oil 95:5, using various eluent systems. Evaluation of the data by using principal component analysis (PCA), separately calculated from the correlation and covariance matrices, and by cluster analysis.

J. Liq. Chromatogr. Relat. Technol. 31, 1458-1464 (2008). TLC of porphyrins and four alkoxy porphyrin derivatives on RP-18 with dichloromethane - methanol 3:2 saturated for 30 min. Detection by visual evaluation under white light.

Anal. Chem. 61, 2288-2292 (1989). Description of a new detection method for the determination of porphyrins present in biological materials. Separation of carboxylic acid porphyrins by HPTLC after esterification. Detection by using one of the visible lines of an argon-ion laser for fluorometric excitation. Demonstration of good selectivity and detectability for the determination of porphyrin profiles in human urine. Detection limits in the 18 - 35 pg ranges.

J. Planar Chromatogr. 17, 72-74 (2004). TLC of porphine, meso-mono-tert-butylporphyrin, meso-tetra-tert-butylporphyrin and their respective Zn(II), Ni(II), and Cu(II) derivatives on silica gel with n-hexane - chloroform 7:3, and on RP-18 with methanol or methanol - water 9:1 after presaturation of the plates for 30 min. The porphyrins were detected visually.

(About the detection of the content of a type of mushroom of the class of panaeolus.) Pharmazie 40, 431-432 (1985). 100 samples from a panaeolus foenisecii species analyzed by TLC on silica with butanol - water - acetic acid - isopropanol 8:5:2:3; staining with Ehrlich reagent. Psilopsibine not found, but indole derivatives such as tryptamine, 5-oxy-tryptamine, 5-hydroxy-indole acetic acid.

62nd Indian Pharmaceutical Congress Abstract No. F-389 (2010). TLC of amlodipine and telmisartan on silica gel with chloroform – methanol – toluene 10:7:3. The hRf values were 23 and 75 for amlodipine besylate and telmisartan respectively. Quantitative determination by absorbance measurement at 238 nm. The sample was also analysed by spectophotometry and the results by both methods were comparable.

Research Journal Pharm and Tech. 2(4),746-748 (2009). A validated HPTLC method is reported for simultaneous estimation of nebivolol hydrochloride and valsartan in combined dosage form. HPTLC on silica gel with ethyl acetate - methanol - 25 % ammonia. The hRf value of valsartan was 27 and of nebivolol 75.The method was linear in the range of 800-2400 ng/band for nebivolol and 200-1000 ng/band for valsartan. Densitometric quantification at 280 nm. The method was found suitable for routine quality control of the combined dosage form.