At the present paper, an analytical method based on temperature controlled solid-liquid extraction (TC-SLE) utilizing a synthesized ionic liquid, (N-butylpyridinium hexafluorophosphate, [BPy]PF₆), as solid solvent and phenanthroline (PT) as an extractant was developed to determine micro levels of Fe(2+) in tea by PT spectrophotometry. TC-SLE was carried out in two continuous steps: Fe(2+) can b...

A microwave-assisted sol-gel method was used to synthesize (N, Fe)-codoped activated carbon (AC)/TiO2 photocatalyst for enhanced optical absorption in the visible light region. The prepared samples were characterized via X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, ultraviolet-visible...

The reaction of iron (II) with 2, 6-diacetylprydine dioxime (H2dapd) and 2-acetylprydine monoxime (Hapm) in 10% and 60% v/v ethanol-water solution at pH 2.5 and 7.5, respectively, were studied using direct and first derivative spectrophotometry. Fe (III) is reduced by H2dapd and gives iron (II) complex. A simple, rapid, selective and sensitive method for the determination of Fe (II), Fe (III) a...

Nuclear resonant inelastic x-ray scattering spectra were measured for Fe in disordered body-centered-cubic alloys of Fe-Cr. Partial phonon density of states DOS curves were obtained from these data. These results, in conjunction with the results of Ruckert et al. Hyperfine Interact. 126, 363 2000 on Fe-Cr thin-film multilayers and alloys, were analyzed with a local-order cluster expansion metho...

A simple, rapid, accurate, precise and sensitive spectrophotometric method for determination of Fe and V in bulk sample using Schiff base derived from salicylhydroxamic acid is described. The method is based on the formation of coloured complexes in weak acidic medium. The coloured products have showed absorption band at λmax 460 nm for Fe +3 – complex and also absorption band at λmax 632 nm fo...

A convenient HPLC method for the quantitative determination of EDTA in foods was developed. EDTA in food samples was easily extracted with water by ultrasonication. After converting to Fe(III) complex in the presence of Fe(III) ions, EDTA was separated on a reversed-phase C30 column and detected with ultraviolet detection (260 nm). Citrate and malate, which are present in many foods, also forme...

L-amino acid oxidase (LAAO) has important biological roles in many organisms, thus attracting great attention from researchers to establish its detection methods. In this study, a new quantitative in-gel determination of LAAO activity based on ferric-xylenol orange (Fe(III)XO) formation was established. This method showed that due to the conversion of Fe(II) to Fe(III) by H2O2 and subsequent fo...

For a high-performance cocatalyst-modified photocatalyst, an effective interfacial separation of photogenerated electron from its corresponding holes and its following reduction reaction at the active sites are highly required. However, it is difficult for a single-component cocatalyst to simultaneously realize the crucial functions. In this study, an effective interfacial transfer of photogene...

He Q., Ren Y., Mohamed I., Ali M., Hassan W., Zeng F. (2013): Assessment of trace and heavy metal distribution by four sequential extraction procedures in a contaminated soil. Soil & Water Res., 8: 71–76. Four sequential extraction procedures (Sposito, Tessier, Silveira and Bureau Communautaire de Reference (BCR)) were used to evaluate the distribution of some metals (Fe, Cu, Cd and Zn) in a co...