Chromatographia 65 (3-4), 239-243 (2007). Description of a novel TLC densitometric method for the determination of solasodine in various Solanum species (Solanaceae). Solasodine does not show UV absorption therefore TLC of an ion pair complex of solasodine with an acid dye was performed. TLC plates developed by using a solvent with an organic acid ensured in situ color development of the complex. Densitometry at 461 nm. Linearity was 79.2 - 495 ng/zone, with a correlation coefficient of 0.995. The method shows good reproducibility, specificity and accuracy (98.54 ± 2.8%), and eliminates post derivatization steps and the problem of background interference. Validation of the method and application of the method to determine solasodine content in various herb samples, herb extract and their formulations, without matrix interference observed.

J. Planar Chromatogr. 21, 221-223 (2008). Construction of a simple and inexpensive compressed air-driven spraying device which can handle small and large volumes of TLC derivatization reagents. The device is made from widely available HPLC accessories, including stainless-steel fittings and tubing, and can be used with corrosive liquids with a wide range of viscosity. TLC of fluorescein, methyl red, bromocresol green, phenolphthalein, and crystal violet on RP-18 with methanol - water 7:3. Evaluation under white light.

J. Liq. Chromatogr. Relat. Technol. 38, 1104-1108 (2015). HPTLC of trans-resveratrol on silica gel with ethyl acetate - cyclohexane - n-butanol 9:9:2. Detection through chemiluminescence by dipping into a TCPO solution (250 mg bis(2,4,6-trichlorophenyl)oxalate in 36 mL n-butyl acetate, followed by adding 0.4 mL hydrogen peroxide that was vigorously shaken with the solution for 20 min). The HPTLC plate was covered by a glass plate and measured for 2 min using a very light-sensitive CCD camera. The hRF value for trans-resveratrol was 78. Linearity was in the range of 20-500 ng/zone. LOD and LOQ were 13.7 and 20.3 ng/zone, respectively.

J. Chromatogr. 350, 468-470 (1985). TLC of various steroids on silica with chloroform - methanol 10:1. Detection by spraying with 1 % rubeanic acid in concentrated sulfuric acid. Evaluation by densitometry. Detection limits 0.1-0.3 mg for most steroids examined.

J. Planar Chromatogr. 2, 65-70 (1989). For qualitative analysis monodansyl cadaverine (MDC) was employed without further purification. Column-chromatographic purification is recommended for the quantification of short chain carboxylic acids. For in situ derivatization the carboxylic acid sample solutions were applied to the HPTLC plates as bands with a maximum length of 10 mm. These were then „overlayed“ with MDC solution containing N,N’-dicyclohexylcarbodiimide to activate the acids. Short-chain carboxylic acids were separated on normal silicagel phases with toluene - ethyl acetate - ammonia mixtures as mobile phase. Stepwise and gradient developments allow the baseline separation. Long-chain carboxylic acids are better separated on RP-18 phases with acetonitrile-tetrahydrofuran mixtures and methanol as mobile phase.

J. Planar Chromatogr. 4, 325-326 (1991). TLC of carboxylic acids (no details) on silica impregnated with different concentrations of paraffin oil in petrol ether with acetic acid - acetonitrile 50:1. Detection after drying at 100-120 °C for 30 min. by spraying with a 0.1% dichloromethane or benzene solution of the 2-methyl-, 2-methoxy-, 2-chloro-, 2-bromo-, or 2-fluoro-derivatives of 9-isothiocyanatoacridine (most efficient: 2- methoxy- and 2-chloro-compounds.

J. Chem. Educ. 73, A4-A6 (1996). Presentation of dip reagents useful for visualization in TLC.

J. Planar Chromatogr. 14, 8-15 (2001). TLC of fatty acid esters on silica gel resp. silica gel/kieselguhr with hexane - acetone 49:1 and on aluminium oxide with hexane - acetone 100:1. 18 new agents have been used for visualizing 8 esters of higher fatty acids. Limits of detection (detectability, D), detectability index, and broadening index were determined for the esters after use of the visualizing agents. Bromophenol blue was the best and most universal detection agent.