Bulletin of the International Association of Forensic Toxicologists (TIAFT) 26 (3) 38-41 (1996). TLC of drugs (morphine, heroin, codeine, amphetamine, diazepam, chlorpromazine, trifluoperazine, promethazine, perphenazine, amitriptyline, desipramine, thioridazine) on silica with ethyl acetate - chloroform - methanol - ammonia 100:60:24:3, ethyl acetate - methanol - NH3 17:2:1, benzene - acetone - ethanol - NH3 45:45:7:3, respectively. Detection by exposure to vapor of formaldehyde 38% - acetic acid anhydride (4:1) and then sulfuric acid 98%. After visual evaluation the plate is placed in a jar saturated with water and again visually evaluated.

CBS 94, 2-4 (2005). HPTLC-AMD of four pharmaceuticals and extracts of surface water on silica gel prewashed with 2-propanol (immersion for 24 h) with a 25-step gradient based on acetonitrile - formic acid - dichloromethane. Luminographic detection at ng-level by immersion of the developed HPTLC plates into Vibrio fischeri bacteria suspension. Visual evaluation with CCD-camera, exposure time 40 s, inversion and scaling of exposure in pseudocolors. To remove matrix (humic acids) from surface water samples size exclusion chromatography is recommended.

Pharmazie 61, 15-17 (2006). TLC of seven local anesthetics (benzocaine, procaine, tetracaine, lidocaine, prilocaine, bupivacaine, articaine) and the related antiarrhythmic drug procainamide on silica gel with ethyl acetate - methanol - 32 % ammonia 96:2:3 with chamber saturation for 15 min. Detection a) under UV light at 254 nm; b) spraying with cobalt(II) thiocyanate solution; c) by subsequent spraying with Ehrlich’s reagent. Except for articaine/prilocaine all drugs could be distinguished. However, articaine could be distinguished from prilocaine and other local anesthetics by a colour reaction with copper(II) sulfate solution.

J. AOAC Int. 91, 1210-1217 (2008). HPTLC of monocrotophos, quinalphos, triazophos, parathion-methyl, isophenphos-methyl, temephos, parathion, phoxim, and chlorpyrifos on silica gel with automated multiple development. HPTLC of phoxim and chlorpyrifos on silica gel with dichloromethane - hexane 1:1 in a twin-trough chamber. Quantitative determination by absorbance measurement at 254 nm.

J. Ethnopharmacol. 123, 244-249 (2009). HPTLC of kaempferol-3-O-rutinoside and astragalin in leaves of Gynura procumbens on silica gel with acetic acid – methanol – dichloromethane 1:3:7. Quantitative determination by absorbance measurement at 366 nm. The hRf values of kaempferol-3-O-rutinoside and astragalin were 43 and 72, respectively, and selectivity regarding matrix was given. Linearity was given between 16 and 1000 µg/mL and the correlation coefficients were >0.987.

J. Liq. Chromatogr. Relat. Technol. 32, 1273-1288 (2009). HPTLC of Sudan I (1), II (2), III (3), IV (4), Sudan Red B (5), Sudan Red 7B (6), Sudan Red G (7), Para Red (8), FD&C Orange 2 (9), Butter Yellow (10), Citrus Red 2 (11), Toluidine Red (12), and Disperse Orange 11 (13) in paprika, chili, and curry on RP-18 with acetonitrile - ammonia 25 % 19:1. Quantitative determination by absorbance measurement at absorption maxima of each dye. The hRf values of compounds (1) - (13) were 61, 54, 48, 29, 18, 11, 69, 63, 56, 48, 39, 18 and 11, respectively. Visual detection limits were 3 ppm for most dyes in either matrix, 5 ppm for Sudan I, 13 ppm for Disperse Orange, and 7 ppm for Butter Yellow. The limits of detection by densitometry were lower by a factor of 2 for all dyes and values of 1-3 ppm were reached except for Disperse Orange with a limit of detction of 7 ppm. Average recoveries ranged from 95.0-110.8 %. The HPTLC method is successfully applied in the routine control of illegal dyes in food by surveillance authorities.

J. Planar Chromatogr. 25, 108-111 (2012). HPTLC of indole acetic acid (1), indole butyric acid (2), and absisic acid (3) in watermelon seeds exposed to heavy metals on silica gel with cyclohexane - methanol - 2-propanol 4:2:1 +1 drop ammonia. Quantitative determination by absorbance measurement at 230 nm. Limit of quantification was 10 ng/zone for (1) and (2) and 6 ng/zone for (3).

Food Control. 68, 310-329 (2016). Review of the methodologies to determine the occurrence of aflatoxin M1 (AFM1) and the fate of AFM1 during processing of milk and dairy products, such as yoghurt and cheeses, since 1996 until today. The review describes the application of TLC and HPTLC in raw and pasteurized milk, feta cheese, yoghurt, white cheese, ice cream and butter.