Ternary diffusion coefficients of 18-crown-6 ether–KCl–water by direct least-squares analysis of Taylor dispersion measurements

1991 ◽  
Vol 87 (4) ◽  
pp. 597-601 ◽  
Author(s):  
Derek G. Leaist
Keyword(s):  
Least Squares ◽  
Diffusion Coefficients ◽  
Taylor Dispersion ◽  
Ternary Diffusion ◽  
Ternary Diffusion Coefficients

Ternary mutual diffusion coefficients of MgCl2 + MgSO4 + H2O and Na2SO4 + MgSO4 + H2O from Taylor dispersion profiles

1991 ◽  
Vol 69 (10) ◽  
pp. 1548-1553 ◽  
Author(s):  
Zhipeng Deng ◽  
Derek G. Leaist
Keyword(s):  
Diffusion Coefficients ◽  
Multicomponent Diffusion ◽  
Taylor Dispersion ◽  
Mutual Diffusion ◽  
Salt Solutions ◽  
Mixed Salt ◽  
Ternary Diffusion ◽  
Peak Broadening ◽  
Ternary Diffusion Coefficients ◽  
Mixed Salt Solutions

The Taylor dispersion (peak-broadening) technique is used to measure the ternary mutual diffusion coefficients of the mixed salt solutions MgCl2 + MgSO4 + H2O and Na2SO4 + MgSO4 + H2O at 25 °C. The dispersion of the solutes is followed by differential refractometry. A simple least-squares procedure is developed to calculate the ternary diffusion coefficients from the refractive index profiles. The coefficients are measured at 0.04, 0.20, or 0.40 mol dm−3 total salt for the molar salt ratios 1:3, 1:1, or 3:1. The measured diffusion coefficients are compared with the limiting values for the completely dissociated salts. Key words: mixed salt solutions, multicomponent diffusion, Taylor dispersion, ternary diffusion coefficients.

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