IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Hexacosane with Seawater
Components:
   (1) Hexacosane; C26H54; [630-01-3]  NIST Chemistry WebBook for detail
   (2) Seawater; ; []  NIST Chemistry WebBook for detail
Original Measurements:
   Sutton, C.; Calder, J.A., Environ. Sci. Technol. 1974, 8, 654-7.

 Variables:
   Temperature = 25 °C   
pH = One salinity: 35 g salts/kg sln
   Concentration = One salinity: 35 g salts/kg sln

 Prepared By:
   P.A. Meyers and D. Shaw

 Experimental Remarks:
   The solubility of hexacosane in seawater was reported to be 1 × 10–8 g(1)/100 g sln and x1 = 6 × 10–12.

 Experimental Data:   (Notes on the Nomenclature)
   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 HgCl2 sln to prevent bacterial growth, and filtered through Gelman glass fiber filter. Natural n-alkane levels too low to cause interference

 Estimated Errors:

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