Helv. Chim. Acta 80, 1144-1152 (1997). TLC of monoterpene glycosides on silica with butanol - propanol - water 2:1:3. Detection under UV 254 and 365 nm or with Godin reagent. TLC autographic assay for the detection of free radical scavenging properties by spraying with a 0.2% solution of DPPH (2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl) in methanol. After 30 min, active compounds appear as yellow spots against a purple background.

J. Planar Chromatogr. 17, 244-249 (2004). TLC of thirty compounds (coumarin derivatives) including by-products on silica gel with ethyl acetate - hexane 2:3 or, for more polar synthesized compounds, with methanol - dichloromethane 7:93 in a saturated chamber. Detection under UV light at 254 nm, and by derivatization if necessary, e. g. by iodine reagent. Quantitative determination by densitometry at 292 - 363 nm. Direct screening of the reaction mixture on the plate for antioxidant activity against the 1,1-diphenyl-2-picrylhydrazyl (DPPH) test radical.

J. Chromatogr. 392, 407-414 (1987). TLC of phenolic antioxidants on silica with 1) benzene, 2) benzene - hexane 75:25, and 3) benzene - ethyl acetate - acetone 100:5:1. Detection by spraying with N-chloro-2,6-dichloro-p-benzoquinone monoimine. Discussion of the experimental conditions.

Proc. 9th Internat. Symp. Instr. Chromatog., Interlaken, April 9.-11., 75 -77 (1997). TLC of polyolefines (listed in Ph. Eur.), dimethyl benzylidene sorbitol, and tert-butyl-4-methoxy phenol on RP-18 silica with polar solvents (tetrahydrofuran, acetonitrile, methanol, water). Detection by derivatization with an isopropanolic solution of phosphomolybdic acid. For more details see C. Sarbach et al., Int. J. Pharm. 140, 169-174 (1996).

J. Planar Chromatogr. 18, 403-404 (2005). HPTLC of antioxidants (Irgafos 168, Irganox 1010, Irganox 1078, Irganox 1330, and BHT) and hexane extracts of polymer granules on silica gel (prewashed with chloroform -methanol 1:1) in an unsaturated twin-trough chamber with hexane - methanol 1:4. Quantitative determination of Irganox 1078 by absorbance measurement at 254 nm.

(Hungarian). Mesogazdasági Kiadó (Agricultural Publisher), Budapest 1986, 164-166. TLC identification of the preservatives salicylic-,sorbic- and benzoic acids in wine on silica with petrol ether - dibutyl ether - formic acid - acetic acid 80:35:3:3. Detection under UV 366 nm. Detection limits: 2 mg/L for salicylic acid and for sorbic acid, 10 mg/L for benzoic acid.

Proc. 9th Internat. Symp. Instr. Chromatogr., Interlaken, April 9.-11., 321-324 (1997). OPLC of BHA, BHT, NDGA and propyl, octyl, and dodecyl gallate on silica with 5 different solvent mixtures (chloroform - methanol, chloroform - methanol - acetic acid, benzene - hexane - acetic acid, benzene - methanol - acetone - acetic acid, methanol - acetone - water). The optimum composition of which were chosen by means of the "Prisma" model. Detection by densitometry.

Innovative Food Science and Emerging Technologies 1, 239-243 (2001). HPTLC of commercial herbal spirits (alcoholic or hydroalcoholic solutions of volatile substances with flavoring or medicinal properties) and one red wine on silica gel with toluene – ethyl formate – formic acid 79:20:1. Antioxidative components were detected by dipping for 30 s in a soybean oil solution (3 % in n-hexane, previously treated with active carbon). Quantitative determination in UV light at 254 nm after different times of UV-exposure (30 min – 20 h). The antioxidant activity could be evaluated from the fluorescence-persisting time of the respective spots and was correlated with linoleic acid oxidation and DPPH-titration methods. Although the nature of the active herbal antioxidants remains to be established, phenolic compounds seem to be key candidates.