SDS Volume (918)
Volume 38. Hydrocarbons in Water and Seawater, Part II, p None
Original Measurements
Schwarz, F. P.; J. Chem. Eng. Data. 1977, 22, 273-7.
Variables:
Room Temp:
11.1 - 31.8
°C
Salinity:
30 g(2)/kg sln
Prepared by:
Method/Apparatus/Procedure:
The solubility of phenanthrene was determined by fluorescence and UV absorption measurements. For fluorescence method, an excess amount of phenanthrene was added to an air-tight 1 x 1 cm quartz fluorescence cell containing 5 mL of salt solution. The cell was rotated at 20 rpm for at least 72 hr in a thermostated water bath and then its fluorescent intensity was measured at 365 and 320 nm. The Spectrofluorimeter employed a ratio-photon counting mode where phenanthrene concentration was linearly related to the fluorescence signal. The UV method was used to obtain the absorptivity of phenanthrene in ethanol solution and therefore provide an absolute solubility scale for the fluorescence method.
Source and Purity of Materials:
- Phenanthrene: purity 99.9%. Sodium chloride: reagent grade. Water: distilled over a $\ce{KMnO4}$ - $\ce{NaOH}$ solution and passed through a Sephadex column. Ethanol: reagent grade.
Estimated Errors:
Ambient temperature: ±0.1°C (author)
Mass concentration (m/v) (1): ±8.4% (author)
Components:
- Phenanthrene, $\ce{ C14H10 }$; [85-01-8] NIST WebBook
- Sodium chloride, $\ce{ NaCl }$; [7647-14-5] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The corresponding mass percent and mole fraction, x1, at 25.0°C calculated by the compilers are 9.94 × 10-5 g(1)/100 g sln and 1.034 × 10-7.
Solubility of phenanthrene in 0.5 mol(2)/L
| $T$ (°C) | $C_{1}$ (mol/L) |
|---|---|
| 11.1 | 2.88 x 10-6 |
| 14.0 | 3.2 x 10-6 |
| 17.5 | 4.07 x 10-6 |
| 20.2 | 4.51 x 10-6 |
| 23.2 | 5.75 x 10-6 |
| 25.0 | 5.72 x 10-6 |
| 29.3 | 7.2 x 10-6 |
| 31.8 | 7.9 x 10-6 |
