J. Planar Chromatogr. 4, 77-79 (1991). HPTLC of xylose, 3-o-methylglucose and rhamnose on silica with ethyl acetate – pyridine – acetic acid – water 75:15;10:10 (3 consecutive runs); detection by immersion in amino-benzoic acid reagent. Detection by densitometry in reflectance mode at 400 nm. Determination of method accuracy for 0.4 and 0.8 µg/4 µL of each monosaccharides (mean results of 20 replicate analyses are reported); CV = < 2.7%.

Pest. (Nongyao) 31, 31-32 (1992). TLC of mipcin (= o-cumenylmethylcarbamate) on silica with acetone – ethyl acetate 1:1. Detection by spraying with 1% potassium iodide – ethanol 5:2. Quantification by densitometry at 400 nm.

Analyst 117, 75-76 (1992). Description of a spray reagent for the detection of pyrethroid insecticides containing a nitrile group by TLC. The chromogenic reagent contains 10% sodium hydroxide solution, 5% copper(II)acetate solution, and 1% phosphomolybdic acid solution followed by 0.1% o-tolidine in acetic acid. Detection limit about 1 µg.

J. Planar Chromatogr. 6, 238-241 (1993). TLC of quinoline, isoquinoline, 6-methyl-, 7-methyl-, and 8-methylquinoline on silica or aluminium oxide. Detection with e.g. eosin yellow, bromothymol blue, thymol blue, helasol green, spadns, and titan yellow as 50 mg / 100 mL solution in 2% aqueous sodium hydroxide solution. Best detectability obtained with helasol green.

CBS 82, 9-11 (1999). HPTLC-AMD of glucose, maltooligosaccharides, anhydrosugars, transglycosidation products, fructose and its derivatives, maltulose, Amadori-compounds and Heyns-compounds on silica gel. Caramelization: isocratic 23-step gradient based on chloroform - methanol - 0.05 % aqueous boric acid 20:11:2 with 3 mm increments of the developing distance. Maillard-reaction: isocratic 3-step gradient chloroform - dichloromethane - methanol - water 35:15:35:6 over 25, 50, 75 mm developing distance. Detection by dipping in aniline-diphenylamine-phosphoric acid reagent, followed by heating at 120 °C for 10 min. Quantification by absorbance measurement at 385 nm.

Indian Drugs 41 (6), 362-365 (2004). HPTLC on silica gel with n-butane - n-propanol - glacial acetic acid - water - chloroform 4:1:1:1:2 with addition of formic acid in proportion of 1:0.001. Densitometric evaluation of ginkgo biloba extract by absorbance measurement at 254 nm. The same plate was used for the quantitative determination of ginseng at 520 nm after spraying with ninhydrin reagent. A simple, fast and precise HPTLC method has been developed for the simultaneous determination of ginkgo biloba and ginseng in solid dosage form.

IPC 56th 2004, Abstract No. GP-3. Simultaneous HPTLC determination of valdecoxib and tizanidine in tablets on silica gel with n-butyl acetate - formic acid - chloroform 7:3:2. Quantitative determination by densitometric scanning at 283 nm. The Rf values of valdecoxib and tizanidine were 0.78 and 0.39 respectively. Linearity range was 200 - 1000 ng/spot and 60 - 300 ng/spot respectively. Mean recovery for both of the compounds was 99.57 – 101.28 %. The method was validated for accuracy, precision, linearity, LOD, and LOQ.

Chinese J. Chromatogr. (Sepu) 24 (1), 69-72 (2006). TLC of dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP) and di (2-ethylhexyl) phthalate (DEHP) in plastic food-packaging bags. Extraction with ethanol by ultrasonication, followed by filtration through a membrane of 0.45 µm. Development with ethyl acetate - anhydrous ether - isooctane 1:4:15 on silica gel. Quantitative determination by densitometry at 275 nm (reference wavelength 340 nm) by use of an external standard. Good linearities were obtained for DMP, DEP, DBP and DEHP. The detection limits were 2.1 ng for DMP, 2.4 ng for DEP, 3.4 ng for DBP and 4.0 ng for DEHP. The relative standard deviations of the four phthalates were 2.8-3.5 %. The recoveries of the four phthalate standards in real sample were 79-111 %. The method presented has the advantages of high precision, high sensitivity, small sample size, and simple pretreatment. The contents in real samples were close to the results by gas chromatography.