Components:
(1) Benzo[e]pyrene,
C20H12; [192-97-2]
NIST WebBook
(2) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Schwarz, F. P.; J. Chem. Eng. Data. 1977, 22, 273-7.
Variables:
Ambient temperature: 8.6 - 31.7 °C
Prepared by:
Method/Apparatus/Procedure:
Two methods were used.
At 25 °C the solubility of (1) in (2) was determined from UV absorption measurements and was used as a standard at other temperatures. At other temperatures the spectrofluorimetry method was used.
The sealed fluorescence cells contained 5 mL of the aqueous solution and an excess of (1) were rotated at least 72 h in a water bath, then removed, quickly wiped dry and placed in the fluorimeter.
Source and Purity of Materials:
- Source not specified; better than 99 mole%, by glc; used as received.
- Distilled over KMnO4 and NaOH and passed through a Sephadex column.
Estimated Errors:
Ambient temperature: ±0.1°C
Mass concentration (m/v) (1): See above.
Experimental Values:
Solubility of benzo[e]pyrene in water
| T (°C) | C1 (mol/L) | x1a | MR1 (g1/100 g sln)a |
|---|---|---|---|
| 8.6 | 1.29 x 10-8 | 2.32 x 10-10 | 3.25 x 10-7 |
| 14.0 | 1.42 x 10-8 | 2.56 x 10-10 | 3.58 x 10-7 |
| 17.0 | 1.76 x 10-8 | 3.17 x 10-10 | 4.44 x 10-7 |
| 17.5 | 1.56 x 10-8 | 2.81 x 10-10 | 3.94 x 10-7 |
| 20.0 | 1.82 x 10-8 | 3.28 x 10-10 | 4.59 x 10-7 |
| 20.2 | 1.90 x 10-8 | 3.42 x 10-10 | 4.79 x 10-7 |
| 23.0 | 2.01 x 10-8 | 3.62 x 10-10 | 5.07 x 10-7 |
| 23.2 | 2.12 x 10-8 | 3.82 x 10-10 | 5.35 x 10-7 |
| 29.2 | 2.55 x 10-8 | 4.59 x 10-10 | 6.43 x 10-7 |
| 31.7 | 2.70 x 10-8 | 4.86 x 10-10 | 6.81 x 10-7 |
