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

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

“…Tables 1 and 2. The ratio R2/R1 of the salt refractivities required to calculate the cross-coefficients Dl2 and DZ1 was calculated by taking the ratio of the peak areas generated per mole of excess injected salt (22,23).…”

“…A least-squares procedure (22,25,26) based on Newton's method was used to fit eq. [12] to the measured solute peaks.…”

“…Details of the comparison are given in ref. 22. The Dik coefficients can also be calculated from the temporal moments of the eluted solute peaks (21).…”

“…These techniques are reliable, but they have not gained wide popularity, largely because the experimental procedures are so laborious. Recently, the more convenient Taylor dispersion (peak-broadening) technique (1,(16)(17)(18)(19) for measuring binary diffusion was extended to three-and four-component systems (20)(21)(22)(23). In a Taylor experiment, a narrow band of solution is injected into a laminar carrier stream of different composition which flows in a long capillary tube.…”

“…Ternary diffusion coefficients can be calculated by moments analysis (21) or, more accurately, 'TO whom correspondence should be addressed. 2Revision received May 15, 1991. by fitting the dispersion equations to the eluted solute peaks (22,23).…”