J. AOAC Int. 76, 335-341 (1993). TLC of sulfamethazine and sulfabromomethazine on silica with ethyl acetate 1:1; detection after mechanical dipping at low speed for 2 s in 100 mL fluorescamine solution (25 mg in 10 mL acetone, to which 90 mL hexane is added). The dipped plate is dried 5 min. with nitrogen, then sprayed with 0.2 M H3BO3 (pH adjusted to 8.0 with 1 M NaOH), placed in - 20°C freezer for 5 min. before densitometry in fluorescence mode. Estimation of detection limit 0.25 ppb.

J. Chromatogr. 674, 3-13 (1994). Discussion of the potential and the constraints of TLC, GC and HPLC towards substance identification, together with their detection modes, including color reactions on the plate, MS and diode - array UV spectrophotometry. Evaluation of the identification power of TLC and color reactions plus GC or HPLC retention indices for the purpose. The possibility for identification by means of computerized database searches are considered.

Detection and determination of taurin in energy drinks. GIT Fachz. Lab. 6, 619-623 (1996). TLC of taurin on silica with 1-propanol - water 7:3 after chamber saturation (1-2 h). Detection by spraying with 1% ninhydrin solution and heating for 3 min at 120 °C. Semiquantitative determination against standards.

J. Planar Chromatogr. 11, 145-148 (1998). HPTLC of codeine, caffeine, papaverine, methaaqualone, nicotine (as reference compounds), and LSD, MDA (3,4-methylen-dioxyamphetamine) on silica gel with methanol - aqueous NH3 200:3. Detection with Dragendorff's reagent for reference samples and with van Urk's reagent for LSD. Methanol - chloroform 1:9 was used as mobile phase for the reference samples and MDA. Detection by spraying with Dragendorff's reagent. The Rf values of the unknown drug are calculated graphically by plotting experimental Rf values against literature Rf values in the same solvent system. Simple and rapid TLC procedure.

Leg. Med. 8, 184-187 (2006). HPTLC on silica gel of cocaine urine samples submitted to solid phase extraction prior to derivatization (methylation) with diazomethane. For methylation samples were mixed with 100 µL of a solution freshly prepared by distillation of 2.14 g N-methyl-N-nitroso-p-toluenesulfonamide with 10 mL potassium hydroxide 96 % in ethanol and 30 mL ethyl ether, and kept at room temperature for 1 min to convert benzoylecgonine to cocaine. Development over 7 cm in a saturated chamber with ethyl acetate – cyclo hexane – ammonia 250:100:1. Detection by spraying with Dragendorff reagent (10 mL of 40 % m/v potassium iodide in water; 10 mL of 1 N solution of bismuth nitrate in glacial acetic acid; 80 mL of 10 % v/v sulfuric acid water solution; 2 g of resublimed iodine). The technique is capable to discriminate cocaine from interfering substances such as nicotine, caffeine and even cocaethylene in urine samples. The limit of detection was 100 ng of cocaine.

J. Planar Chromatogr. 21, 199-200 (2008). TLC of monocrotophos (after alkaline hydrolysis) and other organophosphorus insecticides (malathion, parathion, fenthion, dimethoate, and phorate), organochlorine insecticides (endosulfan and HCH), carbamate insecticides (Baygon and carbaryl), synthetic pyrethroid insecticides (cypermethrin and deltamethrin) on silica gel with chloroform - acetone 7:3 in a saturated chamber. Detection by spraying first with 5 % sodium hydroxide then with 1 % vanillin reagent (1 % vanillin in acetone) followed by heating at 100 °C for 10 min. The detection limit for monocrotophos was 500 ng.

J. AOAC Int. 92, 691-697 (2009). HPTLC of dialkyl phosphate standards (dimethyl phosphate, diethyl phosphate, dimethyl thiophosphate, diethyl thiophosphate and dibutyl phosphate as internal standard) on amino phase, prewashed with methanol, with dichloromethane in a twin trough chamber. Quantitative determination by fluorescence measurement at 366/>400 nm. The limit of quantification was between 0.8 and 1.4 ng/zone. Fluorescence enhancement was achieved by dipping the plate into a 50 % solution of paraffin oil in n-hexane, increasing the sensitivity and resulting in an LOQ of 0.5-0.6 ng/zone.

J. Planar Chromatogr. 24, 105-107 (2011). TLC of twelve bisquaternary acetylcholinesterase reactivator HI-6-salts (sulfate, chloride, acetate, bromide, phosphate, mesylate, tartrate, iodide, malonate, salicylate, maleinate, and tosylate) on cellulose with acetone - acetic acid - water - toluene 5:2:2:1, butanol - acetic acid - water - toluene 1:1:1:1, isopropanol - acetic acid - water - toluene 5:2:2:1, and isopropanol - formic acid - water - toluene 6:2:2:1 in a twin-trough chamber. Detection under UV light at 254 nm and by spraying with Dragendorff’s reagent.