Chemical analysis and investigation

This work is supported by the INTAS-05-1000008-7834, ISTC 3457, the grant of the President of the Russian Federation MK-253.2007.3, the Russian Academy of Sciences within the programs development of methods for synthesis of chemical substances and creation of new materials and Creation of effective methods of the chemical analysis and investigations of structure of substances and materials . 

Mesoporous materials (SBA-15 and Al-SBA-15 with various Si/Al ratios) were synthesized and investigated in relation to their capacity to be used as adsorbents for depollution of the contaminated air or wastewater. The compositional and the structural properties were determined by XRD, N2 isotherms, NMR, chemical analysis and XPS. The acidity and adsorption properties of the solids were checked by adsorption microcalorimetry using various basic or polluting molecules in gas phase. 

A Toxicity Reduction Evaluation (TRE) is a site-specific and systematic approach that combines laboratory testing, chemical analysis and on-site investigations to achieve compliance with toxicity based effluent limits. Three fundamental TRE components include 1) Toxicity Identification Evaluations (TIEs), 2) Source Investigations (Sis), and 3) Toxicity Treatability Evaluations... 

Zahringer, U., Salvetzki, R., Ulmer, A.J., Rietschel, E.Th., Isolation, chemical analysis and biological investigations of natural lipid A and lipid A-antagonists. J Endotoxin Res 3 (Suppl. 1) (1996) 33. 

Pospisilova and coworkers185 investigated the chemical structure of the pea lectin-reactive glycopeptide isolated by Kubanek and coworkers.844 After refining the chemical analysis, and applying glycosidase digestion, they proposed the structure depicted in formula 16. Despite... 

Trommsdorff s Journal der Pharmacie, apothecaries participated in the regular communication of the community of chemists.1191 would like to extend Hufbauer s argument to include not only communication and justification, but also apothecaries investigative practice in the laboratory. The possibility of publishing papers may have provided an incentive for more careful observation in the pharmaceutical laboratory and more systematic and extended chemical investigation. It may have reinforced a trend, which hinged on the correspondence between the material culture of the pharmaceutical and the chemical laboratories, to shift from the pharmaceutically useful to chemical analysis and the experimental history of substances.120 Thus chemical journals may have fed back into the actual practice of apothecaries and contributed to the emergence of the persona of the apothecary-chemist on many different levels. 

X-ray diffraction is a tool for the investigation of the fine structure of matter. This technique had its beginnings in von Laue s discovery in 1912 that crystals diffract x-rays, the manner of the diffraction revealing the structure of the crystal. At first, x-ray diffraction was used only for the determination of crystal structure. Later on, however, other uses were developed, and today the method is applied not only to structure determination, but to such diverse problems as chemical analysis and stress measurement, to the study of phase equilibria and the measurement of particle size, to the determination of the orientation of one crystal or the ensemble of orientations in a polycrystalline aggregate. 

The aim of this work is to develop new Fe-Mo containing mixed oxides highly dispersed in a titania matrix, prepared by the sol-gel method, and to compare these materials to those of iron molybdate prepared by conventional methods (i.e. impregnation). Here, we report the preparation of sol-gel derived iron molybdenum titanium mixed oxides. The bulk composition and the textural properties of these materials are investigated by elemental chemical analysis and N2 adsorption, respectively. 

A systematic investigation of iron substituted mesoporous silicate (FeMCM-41) was carried out. The incorporation of the trivalent iron into the framework as well as the nature of such ions in the mesoporous matrix is presented. The results are discussed in terms of the information obtained using various analytical techniques, viz., XRD, TG, DRUV-VIS, FTIR and ESR, as well as chemical analysis and surface area measurements. 

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