J. Planar Chromatogr. 20, 95-99 (2007). TLC of atrazine and simazine on silica gel with hexane - chloroform - acetone 1253 with chamber saturation. Detection under UV light at 254 nm. Also quantitative evaluation. The genetic algorithm proved to be an optimization procedure which can be successfully applied to optimization of microwave-assisted extraction experiments. Application of recovery experiments from spiked soil.

Anal. Chim. Acta 624 (1), 1-15 (2008). Aminoglycosides and macrolides are important antibiotics for veterinary medicine and are widely used in the treatment of bacterial disease, and as feed additives for growth promotion. As a result the European commission set strict criteria for monitoring residues and requires testing for low levels of aminoglycosides and macrolides in foods. Therefore the development of fast, reliable, and sensitive methods for the extraction and subsequent analysis of these antibiotics is of great interest. The review discusses analytical methods for both extraction and determination of antibiotics in various food matrices focusing on the last 10 years. Extraction and clean-up methods such as deproteinization and solid-phase extraction are described, and various screening methods including TLC, EI, CE, microbiological assays, and LC combined with MS are reviewed.

Acta Chromatographica 20(4), 673-683 (2008). Presentation of a quantitative method for the analysis of lycopene in nutritional supplements consumed to reduce the risk of prostate cancer and other forms of cancer and cardiovascular disease. HPTLC on silica gel with petroleum ether – dichloromethane 91. Quantification by densitometry at 416 nm. Four products containing 300 µg, 3 mg, 5 mg, or 10 mg lycopene plus other ingredients were quantified using a lycopene standard the measured amounts ranged from 77.7 to 98.1 % of the stated label values. The accuracy by spiked blank analysis was within 1.90 % of theoretical values for the 3 mg softgels and 1.10 % of theoretical values for the 10 mg softgels. The precision of replicate analyses showed a RSD of 1.44 % for the 10 mg softgels and 2.39 % RSD for the spiked blank for the 3 mg softgels. The results obtained for Lycopene standards available from two other companies showed 55.6, 57.6, and 20.0 % of the minimum amount expected from the stated label values.

J. Liquid Chromatogr. 8, 1299-1317 (1985). Separation of citric acid, trichloroacetic acid, indole-3- acetic acid, -naphthaleneacetic and -naphthoxyacetic acid on impregnated calcium sulfate plates with ethyl acetate as eluent. Detection with 1 % ethanolic alkaline bromophenol blue solution.

J. Agric. Food Chem. 32, 1254-1256 (1984). Isolation of five propylphenols with chromatographic methods, i.e. TLC on silica with ether - hexane 2575, acetone - chloroform 595, methanol - ethyl acetate - chloroform 11089. Detection by Cladosporium TLC bioassay.

J.A.O.A.C. 68, 839-842 (1985). TLC of mycotoxins with 2-dimensional chromatography using various solvent combinations on silica. Detection by viewing under longwave UV followed by using various spray reagents, i.a. 3-methyl-2-benzothiazoline hydrazone hydrochloride solution, Pauly 5 reagent, ethanolic aluminium chloride, Ehrlichs reagent, sulfuric acid, etc. Patulin, kojic acid, penicillic acid, sterigmatocystin, cyclopiazonic acid, trichothecenes, tenazonic acid.

J. Agric. Food Chem. 34, 753-758 (1986). TLC of deltamethrin and metabolites on silica with benzene (saturated with formic acid) - ether 103. Visualization by autoradiography, quantification by LSC. Structure elucidation of separated components after extraction.

J. Liquid Chrom. 8, 1327-1346 (1985). TLC separation of aldicarb, bavistin, carbofuran, dimecron and oxamyl on soil coated plates (particle size100 mesh) using water (pH 7) and water of pH 4 (adjusted with 0.1 N HCI) and pH 10 (adjusted with 0.1 N NaOH). Detection of aldicarb, bavistin, carbofuran, oxamyl by spraying with 5 % methanolic KOH followed by 0.1 % p-nitrobenzenediazonium tetrafluoroborate. Detection of dimecron with 0.5 % brilliant green in acetone.