Components:
(1) Benzo[a]pyrene,
C20H12; [50-32-8]
NIST WebBook
(2) Seawater,
H2O; [7732-18-5(C)]
NIST WebBook
Original Measurements
Krasnoschchekova, R. Ya.; Pakhapill, Yu. A.; Gubergrits, M. Ya.; Khim. Tverd. Topl. 1977, 11(2), 133-6.
Variables:
Ambient temperature: 25 °C
Salinity: 6 g/kg sln (ref. 1)
Prepared by:
Method/Apparatus/Procedure:
1 L of a 0.5 g/L solution of the hydrocarbon in acetone was distributed over the inside surface of a 1-L round-bottomed flask; the acetone was evaporated with gentle heating. 0.5 L water (or salt water) was added to the dried residue, and the solution was stirred for 6 hr and allowed to settle for 16-18 hr. The upper layer (about 0.3 L) was taken for analysis. The solution was centrifuged twice at 7000 g to remove suspended particles. The hydrocarbon was extracted with benzene and concentrated by evaporation, then purified using thin-layer chromatography. Spectrometric analysis of an octane solution of the hydrocarbon was done using the quasilinear luminescence spectra.
Source and Purity of Materials:
- Not given.
Estimated Errors:
Ambient temperature: ±1°C
Mass concentration (m/v) (1): ±0.008; type of error not specified.
References
1 Krasnoschchekova, R. Ya.; Gubergrits, M. Ya.; Neftekhimiya 1973, 13, 885-8.
Experimental Values:
Note: The solubility of benzo[a]pyrene in salt water was reported to be 0.13 µg/L.The corresponding mass percent and mole fraction, x1, calculated by the compilers are 1.3 × 10-8 g(1)/100 g sln and 9.5 × 10-12 assuming a solution density of 1.004 kg/L.
