No. 95 CAMAG Bibliography Service "yellow pages", Section 33 - 38

33. Inorganic substances

95 102
R. M. BAOSIC, D. M. MILOJKOVIC-OPSENICA, Z. L. TESIC* (*Faculty of Chemistry, University of Belgrade, Studentski trg 16, P. O. Box 158, 11001 Belgrade, Serbia and Montenegro): The effect of the electronegativity of donor atoms in coordinated beta-diketonato ligands on the chromatographic behavior of metal complexes. J. Planar Chromatogr. 17, 250-254 (2004). TLC of three series of beta - diketonato complexes of the type [M(acac)3-n(phacphac)n], [M(acac)3-n(phacphSac)n], and [M(acac)3-n(phSacphSac)n] (where M represents cobalt(III), chromium(III), or ruthenium(III), acac is the 2,4-pentanedionato ion, phacphac is the 1,3-diphenyl- 1,3-propanedionato ion, phacphSac is 3-mercapto-1,3-diphenyl-prop-2-en-1-one, phSacph- Sac is the 3-mercapto-1,3-diphenyl-prop-2-en-1-thion ion, and n = 0-3) on silica gel with five mono-component (chloroform, toluene, dichloromethane, xylene, tetrahydronaphthalene) and five two-component eluents (n-amyl acetate - carbon tetrachloride 1:1, n-butyl acetate - carbon tetrachloride 2:3, chloroform - carbon tetrachloride 1:1 and 3:7, and dichloromethane - carbon tetrachloride 4:1. Separations were performed in a horizontal chamber after equilibration for 30 min. After development the colored spots were readily visible. Qualitative identification 33a, 2c

95 103
Iva REZIC*, L. BOKIC, A. J. M. HORVAT (*Laboratory of Analytical Chemistry, Department of Textile Chemistry and Material Testing, Faculty of Textile Technology, University of Zagreb, Pierottieva 6, 10000 Zagreb, Croatia): TLC separation and identification of heavy metals present in cotton material. J. Planar Chromatogr. 17, 305-308 (2004). TLC of manganese(II), chromium(III), nickel(II), cobalt(II), iron(III), and zinc(II) on cellulose with acetonitrile - hydrochloric acid - water 73:15:12 as optimum ternary mobile phase. Detection by spraying with 0.1 g quercetin in 100 mL 2-propanol and 10 g dimethylglyoxime in 100 mL ethanol and exposition to ammonia vapor. Recording of the colored spots under white light by means of a highly sensitive CCD color video camera. Environmental, densitometry, qualitative identification, quantitative analysis 33a

35. Other technical products and complex mixtures

95 104
L. WILLIAMS*, R. SJOVIK, M. L. FALCK-PEDERSEN (*SINTEF Applied Chemistry, P. O. Box 124 Blindern, N-0314 Oslo, Norway): ChemScreen: Planar synthesis, separation and screening of antioxidants. 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. Environmental, densitometry, quantitative analysis, ChemScreen 35b, 4e

37. Environmental analysis

95 016
W. WEBER et al., see section 4e

38. Chiral separation

95 105
M. SAJEWICZ, R. PIETKA, Teresa KOWALSKA* (*Institute of Chemistry, Silesian University, 9 Szkolna Street, 40-006 Katowice, Poland): Chiral separation of S-(+)- and R-(-)-ibuprofen by thin-layer chromatography. An improved analytical procedure. J. Planar Chromatogr. 17, 173-176 (2004). TLC of R,S-(+-)-ibuprofen and S-(+)-ibuprofen on silica gel prewashed with methanol - water 9:1 and impregnated with L-arginine by conventional dipping for 2 s in a 0.03 mol/L solution of the compound in methanol. One-dimensional development with acetonitrile - methanol - water 5:1:1 plus several drops of acetic acid to adjust the pH to 4.8, and two-dimensional chromatography with the same solvent mixture in two directions. Quantitation by densitometry at 210 nm. Quality control, densitometry, quantitative analysis, ibuprofen 38, 32a Berlin (Germany), 9 Ð11 October 2006