CBS 90, 14 (2003). HPTLC of waste water on silica gel with dichloromethane - methanol - ammonia 90:10:1.Quantitative determination by absorbance measurement at 270 nm.

J. Planar Chromatogr. 19, 15-20 (2006). TLC and HPTLC of fifteen urea pesticides (monolinuron, chlorotoluron, diuron, isoproturon, linuron, dimefuron, diflubenzuron, teflubenzuron, lufennuron, thifensulfuron methyl, triasulfuron, chlorsulfuron, rimsulfuron, amidosulfuron, tribenuron methyl) on RP18 with methanol - water and mixed organic (acetonitrile - methanol 1:1) - 0.1 % aqueous orthophosphoric acid mobile phases, and on silica gel with benzene - methanol and benzene - ethanol mobile phases. Relationships between Rf values and mobile phase composition were determined.

Microbiol. Res. 163, 307-313 (2008). HPTLC of norharmane from cyanobacterial culture medium extracts on silica gel with ethyl acetate - methanol - water 200:33:27 or ethyl acetate - formic acid - water 20:2:1. The hRf values of norharmane were 65 and 20, respectively. Evaluation under UV 254 nm without further derivatization. The screening of microalgal culture medium was performed by HPTLC and HPLC.

Anal. Biochem. 409 (2), 249-259 (2011). Presentation of a less time-consuming, more sensitive, and more precise method for the quantitative determination of nucleoside triphosphates (NTPs), 5-ribosyl-1-pyrophosphate (PRPP), and inorganic pyrophosphate (PPi) in cell extracts by TLC: Separation of an acid extract of L. lactis by charcoal filtration into a filtrate and an eluate, which then was separated by TLC either in the Cashel solvent (0.85 M potassium phosphate, pH 3.4) or in the AFC solvent (3 M ammonium formate [pH 2.4] and 0.7 M ammonium chloride). Two-dimensional separation of 18 µL of the eluate sample using the AFC solvent in the first dimension and using 0.75 M LiCl in 7.5 % lithium borate (pH 6.8, borate solvent) in the second dimension.

J. Planar Chromatogr. 25, 48-53 (2012). HPTLC of alpha-cypermethrin in soil on silica gel with hexane - toluene 1:1. Quantitative determination by absorbance measurement at 220 nm. The hRf values for alpha-cypermethrin was 38. Linearity was in the range of 12.5-1000 ng/zone. Limits of detection and quantification were 2 and 6 ng/spot, respectively. Precision was found in the range 1.7-6.3 % (n=6). Recovery was between 90.8 and 91.2 %.

J. Planar Chromatogr. 27, 287-293 (2014). HPTLC of ciprofloxacin HCl (1) and moxifloxacin HCl (2) in industrial wastewater on silica gel with methanol - ammonia - methylene chloride 11:7:4. Quantitative determination by absorbance measurement at 278 nm. The hRF values for (1) and (2) were 43 and 54, respectively. Linearity was in the range of 250-2500 ng/zone for (1) and 1000-50000 ng/zone for (2). The intermediate/interday/intra-day precisions were below 1 % (n=3). The LOD and LOQ were 110 ad 335 ng/zone for (1) and 101 and 305 ng/zone for (2), respectively. Recoveries were between 79.6 and 91.5 % for both (1) and (2). Results were comparable to a HPLC method.

CBS 114, 5-7 (2015). HPTLC of biodiesel (B100), biodiesel blended with diesel fuel in different proportions (BX, with X_x000D_ being the volume percent of B100 in the mixture) and standard monoacylglyceride on silica gel with the AMD 2 system in a 3-step development starting with 100 % t-butyl methyl ether (up to 40 mm), followed by dichloromethane – n-heptane 4:1 up to_x000D_ 60 mm and then 3:2 up to 90 mm as final migration distance. Detection by dipping in a 0.02 % methanolic solution of primuline. Quantitative determination of monoacylglycerides via the 1-oleyl glycerol standard by fluorescence measurement at 366/>400 nm. Elution of target zones with methanol, flow rate 0.2 mL/_x000D_min, via the TLC-MS Interface (oval elution head 4 x 2 mm) into an ion-trap MS operating in positive ESI mode. The final chromatogram showed a migration distance of 15-20 mm for the monoacylglyceride of BX, other lipids detected were diacylglycerides,_x000D_ triacylglycerides, fatty acids (20–60 mm) and fatty acid methyl esters (60–83 mm), the preponderant chemical class. The sample peak at 86 mm corresponded to the diesel component in the blend.

J. Planar Chromatogr. 31, 7-12 (2018). HPTLC of L-histidine (1), L-glycine (2), L-alanine (3) an L-phenylalanine (4) in Steatoda grossa spider web on silica gel with 2-butanol – acetone – glacial acetic acid – water 7:7:2:4. Detection by spraying with 0.5 % solution of ninhydrin in methanol, followed by heating at 100–110 °C for 10 min. Quantitative determination by absorbance measurement at 500 nm. The hRF values for (1) to (4) were 11, 35, 48 and 72, respectively. Linearity was between 0.2 and 1.0 μg/zone for (1) and (2), 0.1 and 0.5 μg/zone for (3) and 0.3 and 1.5 μg/zone for (4). LOD and LOQ were 185 and 556 ng/zone for (1), 154 and 461 ng/zone for (2), 100 and 302 ng/zone for (3) and 152 and 456 ng/zone for (4).