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  • 1
    Electronic Resource
    Electronic Resource
    Series expansion methods for extracting ternary diffusion coefficients from Rayleigh interferometric data (1981)
    Springer
    Journal of solution chemistry 10 (1981), S. 831-846 
    Details
    ISSN: 1572-8927
    Keywords: Ternary diffusion ; diffusion coefficients ; series expansion ; Rayleigh interferometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Three series expansions are examined for use in extracting ternary diffusion coefficients from Rayleigh interferometric data for free diffusion experiments. Convergence comparisons show that, providing enough terms are used, two of the three are suitable, including one used earlier by Albright and Sherrill. A new simpler analysis, using only linear least squares, has been applied to simulated and real data with good results. Advantages and disadvantages of series methods are compared to a direct non-linear least squares analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649296
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  • 2
    Electronic Resource
    Electronic Resource
    Mutual diffusion coefficients of aqueous ZnSO4 at 25°C (1975)
    Springer
    Journal of solution chemistry 4 (1975), S. 809-816 
    Details
    ISSN: 1572-8927
    Keywords: ZnSO4 solution ; diffusion coefficients ; density ; aqueous solutions ; electrolyte solutions ; Rayleigh interferometry ; thermodynamic diffusion coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Diffusion coefficients of the system ZnSO4−H2O at 25°C have been measured using Rayleigh optics from 0.004 to 3.33m. The results appear to extrapolate with reasonable agreement to the data of Harned and Hudson at very low concentration. The diffusion coefficients decrease from 0.8486×10−5 at 0m to 0.2813×10−5 cm2-sec−1 at 3.33m. Densities were measured over the concentration range 0.10 to 3.60m and combined with the data of Geffcken and of Gibson to obtain an analytical expression for density over the concentration range 0≤m≤3.6.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650537
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  • 3
    Electronic Resource
    Electronic Resource
    Ternary Solution Mutual Diffusion Coefficients and Densities of Aqueous Mixtures of Sucrose with NaCl and Sucrose with KCl at 25°C (1998)
    Springer
    Journal of solution chemistry 27 (1998), S. 309-329 
    Details
    ISSN: 1572-8927
    Keywords: Ternary solution diffusion ; densities ; sucrose ; NaCl ; KCl ; Rayleigh interferometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ternary solution isothermal mutual diffusion coefficients (interdiffusion coefficients) have been measured for aqueous mixtures of 0.250 mol-dm−3 sucrose (component 1) with 0.5 and 1.0 mol-dm−3 NaCl or with 0.5 and 1.0 mol-dm−3 KCl (salt = component 2) at 25.00°C using Rayleigh interferometry with computerized data acquisition. Densities were also measured. The volume-fixed diffusion coefficients (D ij)V show the following characteristics. At all compositions (D 21)V is much larger than (D 12)V and (D 21)V is a fairly significant fraction (33 to 68%) of (D 11)V. In addition, (D 12)V is slightly larger for mixtures containing NaCl than for those containing KCl at the same concentration, whereas (D 21)V is significantly larger for mixtures containing KCl. Values of (D 11)V are slightly larger for solutions containing KCl than for solutions containing NaCl. The observed trends imply that (D 21)V will probably exceed (D 11)V in both mixtures if concentrations of NaCl or of KCl are increased much further while maintaining the sucrose concentration at 0.250 mol-dm−3. Finally, the solvent-fixed cross-term diffusion coefficients (D 12)0 and (D 21)0 are significantly larger than their corresponding (D 12)V and D 21)V.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022623631416
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