Components:
(1) Ethylene,
C2H4; [74-85-1]
NIST WebBook
(2) Human blood,
None; [mix-04]
NIST WebBook
(3) Various aqueous solutions,
None; [class-070]
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Original Measurements
Orcutt, F. S.; Waters, R. M.; J. Biol. Chem. 1937, 117, 509-515.
Variables:
Ambient temperature: 298.15 K
Pressure: 101.325
Prepared by:
Method/Apparatus/Procedure:
The Van Slyke-Neill manometric method which is based on the desorption of gases from blood in a partial vacuum was used. A small volume of solvent is saturated with gas by alternately bubbling the gas through the solvent and shaking the saturator at constant temperature and atmospheric pressure. A small, carefully measured volume of saturated solution is drawn into a 50 cm3 burette by lowering the mercury level in it. A partial vacuum is produced releasing most of the gas. The pressure, volume and temperature are measured. Corrections are made for the solvent vapor pressure (assumed to be as for water) and for the residual gas solubility in the solvent at the low pressure. Details in Ref. 1.
Source and Purity of Materials:
- Ethene. Source and purity not specified.
- Human, blood, not otherwise specified.
- Aqueous solutions as given above, not otherwise specified.
Estimated Errors:
Mass concentration (m/v) (1): δL/L = ±0.10 (compiler)
References
1 Orcutt, F. S.; Seevers, M. H.; J. Biol. Chem. 1937, 117, 501-507.
Experimental Values:
Note: I: Solution I contains 1 cm3 blood added to 2.5 cm3 aqueous acid ferricyanide reagent, total 3.5 cm3.II: Solution II contains Solution I to which is added 1 cm3 1 N caustic, total 4.5 cm3.
III: Solution III contains Solution II to which is added 1 cm3 alkaline hydrosulfite reagent, total 5.5 cm3.
The value of the Ostwald coefficient in dilute aqueous salt solutions containing blood exceeds that in water suggesting that the Ostwald coefficient in blood is geater than that in water, L = 0.108 cm3 gas/cm3 water. The Ostwald coefficient was estimated by the compiler for "pure" blood using reference 1 and was found to be L = 0.143 cm3 ethane/cm3 blood.
| T (K) | L |
|---|---|
| 298.15 | 1.18 x 10-1 |
| 298.15 | 1.10 x 10-1 |
| 298.15 | 9.3 x 10-2 |
