The crystal structures of different forms of TiO2 and those of BaTiO3, ZnO, SnO2, WO3, CuO, Fe2O3, Fe3O4, ZrO2 and Al2O3 nanoparticles have been deduced by powder X-ray diffraction. Their optical edges have been obtained by UV-visible diffuse reflectance spectra. The photocatalytic activities of these oxides and also those of SiO2 and SiO2 porous to oxidize iodide ion have been determined and c...

This study describes an extremely sensitive and simple assay to measure small volumes of solutions, <1 nL. The assay takes advantage of the Sandell-Kolthoff reaction in which yellow cerium(IV) is reduced to colorless cerium(III) in the presence of arsenic(III) and catalytic quantities of iodide ion. The reaction is linear with respect to the rate of Ce(IV) reduction and the quantity of I(-) pre...

The photochemistrv of evacuated potassium iodide solutions a t 2537 b. was investigated. The dependence of the initia quantum yields on pH, iodide ion concentration and light intensity was investigated. The nature of the residual pH independent yield a t pH >3 is discussed. The pH dependence of the initial quantum yields could be represented by a linear dependence on the square root of H T ion ...

The development of a FIA system for the determination of total choline content in several types of milk is described. The samples were submitted to hydrochloric acid digestion before injection into the system and passed through an enzymatic reactor containing choline oxidase immobilised on glass beads. This enzymatic reaction releases hydrogen peroxide which then reacts with a solution of iodid...

McGinty and Sharp (1) demonstrated that the thyroid glands of rats treated with propylthiouracil retained the ability to concentrate iodide ion but failed to bind the iodine in an organic form. VanderLaan and VanderLaan (2) and Stanley and Astwood (3) showed also that thyroidal iodide, "trapped" under the influence of the antithyroid drugs, could be rapidly discharged from the gland by the admi...

Rapid separation and determination of mixtures of L-ascorbic acid, nitrite, sulfite, oxalate, iodide and thiosulfate by conventional ion chromatography is often difficult due to incomplete separation of L-ascorbic acid and nitrite from the water peak when using eluents giving short elution times for iodide and thiosulfate. Separation of the six species within about 15 min has been achieved by i...

Novel solid-contact iodide-selective electrodes based on covalently attached 1,2,3 triazole ionic liquid (IL) were prepared and investigated in this study. Triazole-based IL moieties were synthesized using click chemistry and were further copolymerized with lauryl methacrylate via a simple one-step free radical polymerization to produce a "self-plasticized" copolymer. The mechanical properties ...

A method for determining the concentration of iodide in beer using high-performance liquid chromatography/electrochemical detection was developed. Simple sample pretreatment of beer was performed using a monolithic silica disk-packed spin column, with a recovery rate of 84.9%. Separation of iodide ions from other endogenous compounds was carried out using a mobile phase of 10 mM sodium phosphat...