About Us | Help Videos | Contact Us | Subscriptions

Soil Science Society of America Journal Abstract -

The Cause of the Suspension Effect in Resin-water Systems1


This article in SSSAJ

  1. Vol. 35 No. 2, p. 260-265
    Received: July 17, 1970
    Accepted: Nov 13, 1970

Request Permissions

  1. R. A. Olsen and
  2. J. E. Robbins2



Two hypotheses persist regarding the cause of the suspension effect. The traditional hypothesis attributes the effect to a different activity of ions in the suspension than in the dialyzate. The alternative hypothesis attributes the effect largely to a junction potential at the calomel-suspension boundary. Data obtained by means of three independent methods in this investigation indicate that the latter hypothesis is correct. A potentiometric technique indicated that activities of chloride ions cannot be reliably measured directly in resin-water systems due to the uncertainty of a junction potential which may be negligibly small or may be as high as several hundred millivolts. Osmotic pressure and freezing point determinations provided confirmatory evidence that the activity of ions was virtually identical in slurry and dialyzate even though the suspension effect was exceptionally large.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America