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  • 1
    Electronic Resource
    Electronic Resource
    Preconcentration and voltammetric determination of palladium (II) at sodium humate modified carbon paste electrodes (1999)
    Springer
    Fresenius' journal of analytical chemistry 363 (1999), S. 114-117 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A chemically modified carbon paste electrode was prepared by incorporating appropriate amounts of sodium humate(NaA). Palladium(II) was selectively accumulated in a solution of Britton-Robinson(B-R) buffer (pH 2.8) onto the electrode surface in open circuit mode. The subsequent electrochemical measurement was carried out by cyclic voltammetry (CV) and linear sweep anodic stripping voltammetry (LSASV) in a supporting electrolyte of 1.0 M HCl. The obtained oxidation currents (Ipa1 and Lpa2) were proportional to the Pd(II) concentration in the range of 4.7 × 10–6 - 9.4 × 10–8 M. The developed method was applied to the quantitative determination of palladium in real samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051150
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  • 2
    Electronic Resource
    Electronic Resource
    Crystalline carbon nitride films formation by chemical vapor deposition (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 634-636 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Crystalline carbon nitride films have been synthesized in a rf plasma assisted hot filament chemical vapor deposition system. Large crystalline grains up to ∼10 μm in size as well as film-like regions are observed in the morphology of the films. β-C3N4 with two groups of lattice parameters (one is consistent with the theoretical value and the other is ∼3% smaller) in the deposited films on polycrystalline Ni substrate has been revealed by x-ray diffraction spectrum (XRD). No Raman shift peaks have been found by Raman scattering measurement, but some presently unknown diffraction peaks appeared in the XRD spectrum. It is proposed that there are possible unknown structures of crystalline C-N in the films. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116492
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  • 3
    Electronic Resource
    Electronic Resource
    Relationship between electronic tunneling coefficient and electrode potential investigated by using self-assembled alkanethiol monolayers on gold electrodes (1993)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 97 (1993), S. 11497-11500 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100146a025
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  • 4
    Electronic Resource
    Electronic Resource
    Voltammetry and electrocatalytic properties of cobalt (1,4,8,12-tetraazacyclopentadecane) in aqueous solution (1995)
    Springer
    Transition metal chemistry 20 (1995), S. 552-556 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The spectrochemical, electrochemical and electrocatalytic properties of Co[15]aneN4 ([15]aneN4 = 1,4,8,12-tetraazacyclopentadecane) have been investigated. The results show that, in aqueous solution, this compound mainly exists as three species whose axial coordination positions are occupied by water and/or hydroxy ligands; it is marginal whether other substrates such as Cl− and NO inf3 sup− interact with the central ion in acid-base solutions. The approximate Pourbaix diagram of CoIII/II[15]ane N4 was determined. There is an electrochemically-induced isomerization between two trans conformational isomers of the Co[15]aneN4 complexes in acid and netural solutions. The Co[15]aneN4 complex has electrocatalytic properties for reduction of nitrate and nitrite only in strong alkaline solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00136418
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  • 5
    Electronic Resource
    Electronic Resource
    Structural characterization of BDN-SOH LB films using small angle XRD and Fourier transform IR spectroscopy (1999)
    Springer
    Journal of materials science 34 (1999), S. 5569-5574 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract We investigated the structure of BDN(bis(4-diethylaminodithiobenzil) Nickel)-SOH(Stearyl alcohol) Langmuir-Blodgett films using small angle X-ray diffraction and polarized FTIR spectroscopy. The results show that the microcrystal domains formed on the surface of LB film resemble a well-laminated periodic structure with a molecular spacing of 2.56 nm. Meanwhile, the tilted angles of the molecules of SOH and BDN are about 30°, referring to the normal direction of the sample surface, as determined by our XRD and FTIR studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004781032524
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  • 6
    Electronic Resource
    Electronic Resource
    Voltammetric determination of hydrazine based on catalytic reaction in the presence of 4-hydroxy-2,2,6,6-tetramethyl-piperdinyloxy (TEMPOL) radical (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 1429-1431 
    Details
    ISSN: 1040-0397
    Keywords: Hydrazine ; TEMPOL ; Voltammetric determination ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A rapid, simple and highly sensitive voltammetric method was developed for the determination of hydrazine based on the electrochemical oxidation of hydrazine catalyzed by TEMPOL at a glassy carbon electrode at neutral medium. A linear calibration plot was obtained over the range of 1 × 10-6 M-5 × 10-4 M. The detection limit was 1 × 10-6 M. The method was applied successfully to the determination of hydrazine in waste and river water.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091811
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  • 7
    Electronic Resource
    Electronic Resource
    Voltammetric behavior and determination of bismuth on sodium humate modified carbon paste electrode (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 645-649 
    Details
    ISSN: 1040-0397
    Keywords: Modified carbon paste electrode ; Cyclic voltammetry ; Differential pulse stripping voltammetry ; Sodium humate ; Bismuth ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preconcentration and voltammetric behavior of BiIII on a sodium humate modified carbon paste electrode was studied by means of cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPSV). The proposed measurement involves an initial nonelectrolytic preconcentration step in which BiIII is complexed by the surface modifier in a solution of 0.05 M KNO3-0.0106 M HNO3 (pH 2.0) and a subsequent electrochemical scan step in which the preconcentrated BiIII was reduced and then oxidized promptly in supporting electrolyte of 0.5 M HNO3. The resulting DPSV anodic current was proportional to the concentration of BiIII ion over the range of 4.78 × 10-8-1.44 × 10-5 M. The detection limit was 4.78 × 10-8 M. The proposed method was used to determine bismuth in various samples. Various factors affecting the electrode behavior were also investigated at the same time.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090813
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  • 8
    Electronic Resource
    Electronic Resource
    Electrocatalysis of adsorbed Co-cyclam at Au electrodes for nitrate reduction in concentrated alkaline solution (1995)
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 756-758 
    Details
    ISSN: 1040-0397
    Keywords: Electrocatalysis ; Nitrate reduction ; Co-cyclam ; Au electrode ; Modified electrode ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cobalt-cyclam, trans-CoIII-([14]aneN4)Cl2, was directly adsorbed on Au electrodes to form adsorbed Co-cyclam modified electrodes. The presence of Co-cyclam on the surface of the electrodes was determined by XPS (X-ray photoelectron spectroscopy), differential capacity, and the voltammetric behavior of the Co-cyclam modified electrode in 3 M NaOH solution. The electrocatalytic activity of this modified electrode towards nitrate reduction was examined in 3M NaOH solution, and a comparison of the electrocatalytic activities of the Co-cyclam modified electrode and the Co-cyclam incorporated Nafion film modified Au electrode is discussed. The results showed that the new modified electrode exhibited a more efficient catalytic effect.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140070813
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  • 9
    Electronic Resource
    Electronic Resource
    Study of the adsorptive voltammetric behavior of the RhIII-5-Br-PADAP complex (1995)
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 759-762 
    Details
    ISSN: 1040-0397
    Keywords: Adsorptive stripping voltammetry ; Rhodium ; 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The adsorptive voltammetric behavior of the RhIII-2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) complex was studied with the linear scan technique in a solution of 0.01 mol/L NaOAc-0.07mol/L HOAc-35% ethanol (supporting electrolyte, pH 4.2).A very sensitive and selective adsorptive stripping voltammetric method for the determination of Rh is described. The proposed method can be used for determining trace rhodium in the concentration range 7.8 × 10-9-9.7 × 10 -7 mol/L without interference from other noble metal ions. At the same time, a simple oscillopolarographic procedure for determining Rh in the same electrolyte is also proposed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140070814
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