Iron is quantitatively retained on an adsorbent made by coprecipitation of 1,2-dihydroxybenzene-3,5-disulfonic acid (Tiron) and tetradecyldimethylbenzylammonium choride (TDBA) an microcrystalline naphthalene as a slurry or packed in a column, in the pH range 6.0-9.0 from a large volumes of aqueous solutions (up to 200 ml on microcrystalline naphthalene and up to 500 ml of aqueous solutions ...

Two simple and sensitive spectrophotometric and RP-HPLC methods are described for the determination of Olmesartan Medoxomil. The first method Spectrophotometry was based on the standard curve. Olmesartan Medoxomil exhibits λmax at 258 nm. Quantitative estimation of Olmesartan Medoxomil was carried out the standard calibration curve at 258 nm. The second method, high-performance liquid chromatog...

A simple and sensitive solid phase extraction utilizing C18 filled cartridges incorporated with dithizone for preconcentration of lead and its subsequent determination by flame atomic absorption spectrometry (FAAS) was developed. Several parameters such as type, concentration and volume of eluent, pH of the sample solution, flow rate of extraction and volume of the sample were evaluated. The ef...

A fully automated pretreatment system based on sequential injection solid-phase extraction (SPE) coupled to a graphite furnace atomic absorption spectrometer (Auto-Pret-GFAAS system) was developed to determine trace amounts of cadmium and lead. A handmade minicolumn packed with a chelating resin was used for the preconcentration of both metals. All protocol for the on-line SPE method was contro...

A novel Zn(II) imprinted polymer was synthesized via a co-precipitation method using graphene oxide/magnetic chitosan nanocomposite as supporting material. The synthesized imprinted polymer was characterized by Fourier transform infrared spectrometry (FTIR) and scanning electron microscopy (SEM) and applied as a sorbent for selective magnetic solid phase extraction of zinc followed by its deter...

Objectives/Goals The goals of this project were to determine a) whether Copper-induced oxidation of Bilirubin leads to the bluish black pigment noted in Pigmented Gallstones in patients with hemolysis, b) the structures of the species involved, and c) what other metals participate in the formation of the stones. Methods/Materials Materials: Bilirubin (BR), Copper, Zinc and Calcium salts, Potass...

in the present study, the effect of porosity on the cathode microstructure (50:50 wt. % lsm: ysz) of a solid oxide fuel cell (sofc) has been examined. a 3-d finite element method for mixed ionic and electronic conducting cathodes (miec) is presented to study the effects of porosity on cell performance. each microstructure was realized using the monte carlo approach with the isotropic type of gr...

topical retinoids are considered as the first line therapy in the treatment of acne vulgaris, but they are associated with cutaneous irritation. in this study, isotretinoin-loaded solid lipid nanoparticles(it-sln) were prepared to treat the mild to moderate acne. also using it-sln would minimize it adverse effects in comparison to commercial product, isotrex®. this study was conducted to prepar...