SDS Volume (971)

Volume 38. Hydrocarbons in Water and Seawater, Part II, p None

Original Measurements

Sutton, C.; Calder, J. A.; Environ. Sci. Technol. 1974, 8, 654-7.

Variables:

Room Temp: 25 °C
Salinity: 35 g salts/kg sln

Prepared by:

D.G. Shaw, P.A. Meyers

Method/Apparatus/Procedure:

(1) and (2) were placed in a glass stoppered flask fitted with a Teflon stopcock near the bottom. The components were equilibrated by gentle shaking for 12 hrs at 25.0 ± 0.1 °C. The mixture was then allowed to stand for 24 hrs. Samples removed via the stopcock were filtered with suction through 0.45 µm membrane filters to remove any hydrocarbon droplets. The filtrate was extracted three times with hexane and analyzed by gas chromatography

Source and Purity of Materials:

1. Analabs, Inc., North Haven, Conn. 99+% pure hydrocarbons.
2. Seawater collected from 25 m depth in Gulf of Mexico, poisoned with $\ce{HgCl2}$ soln. to prevent bacterial growth, and filtered through Gelman glass fiber filter. Natural n-alkane levels too low to cause interference.

Estimated Errors:

Ambient temperature: Eight replications were made. The average of the deviations of the mean gave an experimental error of ±16%, yet some accommodation may have occurred due to presence of natural dissolved organic matter.