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Soil Science Society of America Journal Abstract -

Accuracy of Several Immiscible Displacement Liquids1


This article in SSSAJ

  1. Vol. 47 No. 5, p. 1045-1047
    Received: Oct 7, 1982
    Accepted: Apr 8, 1983

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  1. J. A. Kittrick2



Equilibrium solutions were displaced from moist samples of gibbsite and calcite of known stability using four different immiscible liquids, carbon tetrachloride, tetrachloroethylene, FC70 (a fluorocarbon), and 1,1,1-trichloroethane. All four immiscible liquids permitted accurate solution analyses for gibbsite in the pH range near 4. In the pH range near 8.3, 1,1,1-trichloroethane significantly decreased the pH of solutions displaced from calcite. All solutions in this pH range required protection from CO2 variations. Tetrachloroethylene and FC70 permitted accurate analyses of displaced solutions and are less toxic than CCl4.

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