J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (3), 385-388 (2005). TLC of the extracts on silica gel with 1) ethyl acetate - acetone - formic acid - water 5:5:1:1; 2) chloroform - ethyl acetate - methanol - water 8:20:11:5; 3) n-hexane - ethyl acetate 9:1. Detection by spraying with 1) 5 % H2SO4 and 2) 10 % H2SO4, both in ethanol followed by heating at 105 ºC until the spots are visualized; 3) under UV 365 nm. Identification by comparison with the standard. Quantification of geniposide by HPLC. The analysis results for three real life samples are given.

J. Planar Chromatogr. 19, 191-194 (2006). TLC of the flavonoid and triterpenoid soyasaponin content (rutin, vitexine, isovitexine, soyasaponin I and VI as standards) on silica gel in a twin-trough chamber with ethyl acetate - formic acid - acetic acid - water 100:11:11:26 for flavonoids. Detection with diphenylboric acid 2-aminoethylester (natural products reagent) followed by PEG reagent. For soyasaponins chloroform - methanol - water 6:4:1 was used. Detection by spraying with anisaldehyde - sulfuric acid reagent followed by heating at 115 °C.

J. Liq. Chrom. & Rel. Technol. 27, 1579-1592 (2004). TLC of an orange color standard before and after saponification (as beta-cryptoxanthin) on RP18 with acetonitrile - acetone - n-hexane 11:7:2 and acetone - water 9:1. Measuring the visible absorption spectra in the range of 370-700 nm by scanning densitometry with its maximum absorption wavelength at 455 nm.

Indian Drugs 42 (6), 340-344 (2005). HPTLC of captopril and hydrochlorothiazide in tablets on silica gel with methanol - toluene - ethyl acetate - glacial acetic acid 2:12:6:1. Quantitative determination by absorbance measurement at 219 nm. The Rf value of hydrochlorothiazide was 0.38 and of captopril 0.57. The calibration curve response was 4-14 µg for both drugs. Recovery was determined by standard addition method. The percent recovery by area was found to be 100.25 for captopril and 99.98 for hydrochlorothiazide. The method was suitable for routine quality control of such formulations.

Indian J. Pharm. Sci. 67 (3), 351-355 (2005). HPTLC of carbamazepine, phenytoin, and phenobarbitone in tablets on silica gel with toluene - acetone 5:2. Quantification by absorbance measurement at 217 nm. This method was quantitatively evaluated in terms of linearity, accuracy, precision, repeatability and specificity proving its utility in estimation of drug content in tablet dosage form.

Planta Med. 71, 754-758 (2005). Analytical and preparative TLC of sarcolobin, sarcolobone, 6,7-dimrethoxy-2,3-dihydrochromone and 10 known compounds on silica gel with chloroform - petroleum ether - ethyl acetate 20:11:10. Visualization under UV light at 254 and 366 nm and/or by spraying with cerium sulfate (1 % in 10 % aqueous sulfuric acid) followed by heating at 105 °C for 5 min. Also centrifugally accelerated TLC on silica gel with an Chromatotron instrument in a nitrogen atmosphere using petroleum ether - ethyl acetate 2:1.

J. Planar Chromatogr. 19, 463-466 (2006). Preparative RP-HPTLC of anthocyanin extracts (e. g. malvidine) on silica gel with five-step gradient elution with different concentrations of toluene - acetonitrile - water - formic acid - n-butanol - 2-propanol and resp. addition of tert-butylmethyl ether. After extraction of the third zone from the layer, HPTLC on RP-18 as the best stationary phase with a three-step gradient elution using methanol - water - formic acid in different ratios. Quantitative determination by absorbance measurement at 470 nm.

Acta Chrom. 9, 123-132 (1999). TLC of phenolic pesticide residues (m-nitrophenol, p-nitrophenol and p-aminophenol) in banana fruits and plant-tissues on stannic arsenate–silica gel layers. Several mobile phases of different polarity were evaluated; separation of m-nitrophenol, p-nitrophenol, picric acid and p-aminophenol was best achieved with ethanol – 1.0 M citric acid 1:3. Visualization by spraying with AgNO3 – reagent (saturated AgNO3 solution in acetone 1:20 diluted with water until the precipitate of AgNO3 was dissolved) followed by heating at 105 °C, or by spraying with a mixture of 15 % FeCl3 and 1 % K4Fe(CN)6 1:1.