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Showing 1 to 20 of 32 for “"Perchloric acid"”.
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The electrolytic reduction of osmium tetroxide in perchloric acid solution
… some of the chemistry of osmium tetroxide in perchloric acid solution. The research was originally instigated from a seminar report on the ruthenium III thiocyanate complex ion which was studied in perchloric acid solution. The seminar report given by Craig Townsend discussed how a …
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Voltages produced at the polarized mercury-electrolyte interface
… the length of capillary tubes containing 1 N perchloric acid and mercury drops are studied experimentally and theoretically for constant acceleration and different lengths of the drops of mercury. A relatively simple theory explains many features of the voltage on the experimental parameters. …
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The kinetics of the Arsenic(III)-Chromium(VI) reaction in various buffer solutions
… reaction have been measured in perchloric acid solutions, acetic acid solutions, acetic acid-acetate buffers, ammonium nitrate solutions, and dihydrogen phosphatemonohydrogen phosphate buffers. The rate laws are: Perchloric Acid - -d[Cr(VI)]/ dt = [k₀ + k<sub>H</sub>[H⁺] + …
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ΜΕΛΕΤΗ ΑΝΤΙΔΡΑΣΕΩΝ ΕΤΕΡΟΚΥΚΛΙΚΩΝ ΑΡΩΜΑΤΙΚΩΝ ΝΙΤΡΩΔΑΜΙΝΩΝ
… PERCHLORATE IN 0.1-4.0 N PERCHLORIC ACID IS OF FIRST ORDER IN AMINE AND NITROUS ACID AND FOLLOWS THE RATEEXPRESSION: R=K3 [AMINE] [NITROUS ACID] HO. (I) THE RESPECTIVE NITROSAMINE FORMED IS EASILY DENITROSATED UNDER THE EXPERIMENTAL CONDITIONS. THE VALUE OF K3 IS COMPATIBLE …
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Some studies of the reaction between stannic chloride and silver perchlorate in anhydrous media
… received a great deal of attention. Of the oxy-acids which can form ionic as well as covalent compounds, perchloric acid and sulphuric acid are of special interest because of the electronic symmetry and the stability of their anions, While compounds of the elements of group IV, in the divalent …
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Responses of Quercus alba L. seedlings to fertilization with nitrogen and phosphorus
… Soil P tests were made by three methods: dilute acid extractable P (Mehlich), acid flouride extractable P (Bray no. 1), and total P by perchloric acid digestion. Correlation analyses were performed on seedling growth, foliar P content, and soil P tests. Confounding factors, including site …
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Mineral content of vegetables grown with organic and mineral fertilizers
… were wet washed with concentrated nitric and perchloric acid. Concentrations of Cu, Fe, Mn, Zn, Na, K, Ca and Mg were determined using the Perkin-Elmer Atomic Absorption Spectrophotometer. Unequal variation between treatments rendered the F test meaningless for many minerals. Where differences …
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An investigation of the combined use of cation exchange enrichment and spectrochemical analysis for the determination of trace constituents in common silicate rocks and chondrites
… Cation exchange chromatography with hydrochloric acid elution was employed to resolve the complex mixtures obtained from rocks and meteorites into a number of fractions in which the concentration of various trace constituents were above their spectrochemical detection limits; the trace …
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Electrolytic conductances and related properties of solutions of some acids and salts in acetone
… of the conductances of solutions in acetone of perchloric acid and some of its salts by the new potentiometric method would be advantageous. The conductances of three alkali perchlorates and the previou3ly unknown conductances in acetone of ammonium perchloratey pure anhydrous perchloric acid …
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Metallic and bimetallic catalysts for electrochemical reduction of problematic aqueous anions
… onset of approximately -200 mV vs. Ag/AgCl in a perchloric acid solution of pH 1. The high onset potentials in these systems are greater than 0 V RHE and therefore represent the fact that these systems could function as catalysts for hydrogenation of nitrate. Of the systems studied they also have …
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A study of the effects of oxypertine on monoaminergic pathways in rat brain using a new HPLC/ECD method.
… made as simple as possible (homogenisation in perchloric acid, plus centrifugation) so that all the compounds of interest are present in the sample. The biochemical action of oxypertine has been assessed using the above system. Comparing the action of oxypertine against the action of reserpine …
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Selected minerals in raw and cooked chicken parts
… meats, skin, fat and drippings. A nitric and perchloric acid wet-ashing digestion eliminated all organic matter from ten gram samples leaving behind the elements which were detected spectrophotometrically. Values were expressed in mg/100g wet sample. The most abundant minerals studied were …
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Development of a simple HPLC-UV method for determination of GFR by serum iohexol clearance
… Serum samples were deproteinized by addition of perchloric acid (5%). The assay met the sensitivity cut-off with a mean signal-to-noise ratio of 17.2 at a level of 10 µg/mL iohexol. Mean recovery was 103.7% (CV=4.4%). The dilution experiment allowed for 5-times dilution up to iohexol levels of …
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Heavy metals in river sediments
… of the dried sample. A rapid hydrochloric acid/hydrogen peroxide digestion was chosen after a brief comparison with the more traditional nitric/perchloric acid digestion.<br/><br/>The results were used in a survey of the heavy metal concentrations over the length of the river and in …
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Development of new pyrochlore-type electrocatalysts for oxygen evolution reaction in acid
… exchange membrane (PEM) is the development of acid-stable, active catalysts for the oxygen evolution reaction (OER). In addition to discovering new catalysts, a fundamental understanding of OER activity and stability origin is also critical. This dissertation focuses on: (1) identifying active …
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An NMR study of human brain tumours: Phosphorus chemical shift imaging in vivo and high resolution proton spectroscopy of biopsy samples.
… High resolution $\sp1$H spectroscopy of perchloric acid extracts of biopsy samples was performed. The extracts confirmed that lactate, acetate, creatine and choline derivatives, NAA, glutamate, glutamine, alanine, valine and leucine were present in the samples. Comparisons of extract and …
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