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A Capillary Tube Diffusion Cell for Measuring Ion Diffusion in Aqueous Solutions¹

ABSTRACT

A capillary tube diffusion cell unit with directions for its preparation and use in measuring ion diffusion in aqueous solutions is described. Self-diffusion data for Sr, Rb, and Na in single and mixed ion systems and one herbicide, metribuzin (¹⁴C) are reported. Values can be routinely obtained with coefficient of variations below 3%.

¹ Contribution from the Arkansas Agr. Exp. Sta., Fayetteville. This project was supported in part by a grant from the National Science Foundation (NSF-30059-Brown) and is gratefully acknowledged.

² Professor of Agronomy, Agronomy Dep., Univ. of Arkansas, Fayetteville.

Received for publication November 6, 1973. Accepted for publication January 8, 1974.