SDS Volume (3356)

Volume 67. Halogenated Ethanes and Ethenes with Water, p 426

Original Measurements

Warner, H. P.; Cohen, J. M.; Ireland, J. C.; 'Determination of Henry's Law Constants of Selected Priority Pollutants' U.S. EPA Technical Report, PB87-212684, Cincinnati, OH.; July 1987.

Variables:

Room Temp: 298 $\pu{K}$

Prepared by:

A.L. Horvath

Method/Apparatus/Procedure:

The original method and apparatus for the determination of Henry's law constants, as described by Mackay et al. [1], was used. The general procedure was to add an excess quantity of tetrachloroethene to distilled deionized water, place the sample in a thermostat bath, and mix overnight. A portion of this solution was returned to the stripping vessel. Tetrachloroethene was stripped isothermally from the solution mixture at a known gas flow rate. The Henry's law constant was calculated from the log of the concentration versus time plot. The experimental data values are averages of two or more replicates.

Source and Purity of Materials:

1. Purest quality available, used without further purification, stated purity greater than 99%.
2. Distilled deionized.

Estimated Errors:

Ambient temperature: ±0.05 K.
Mass concentration (m/v) (1): ±6.0% std. dev.

References

¹ Mackay, D.; Shiu, W. Y.; Sutherland, R. D. Environ. Sci. Technol. 1979, 13, 333.