SDS Volume

Volume 59. Polycyclic Aromatic Hydrocarbons: Binary Non-aqueous Systems, Part II Solutes F-Z, p None

Source Publication

Khossaravi, D.; Connors, K. A.; J. Pharm. Sci. 1992, 81, 371-379.

Conditions:

Room Temp: 298 $\pu{K}$
Solvent composition

Compiler:

W.E. Acree, Jr.

Methodology:

Constant temperature bath, calorimetric thermometer, and an HPLC equipped with ultraviolet detection.
Binary solvent mixtures were prepared by volume. Excess solute and solvent placed in glass ampoules and allowed to equilibrate in a constant temperature water bath for 48 hours. Aliquots of the saturated solutions were removed, filtered through a 0.22 micrometer polytetrafluoroethylene membrane filter, transferred to a volumetric flask, and diluted quantitatively to the mark. Solute concentrations were determined using reversed-phase HPLC with uv detection at 274 nm. 4-Butylbenzoic acid served as the internal standard.

Sample Information:
  1. Purified Grade, Mallinckrodt, Paris, Kentucky, USA, was used as received.
  2. HPLC grade, EM Science, Gibbstown, New Jersey, USA, was used as a received from the chemical supplier.
  3. Was purified with a Sybron/Barnstead PCS system consisting of prefilter, organic ion exchange, and microfilter (0.2 micrometer) cartridges.
Measurement Errors:

Ambient temperature: T/K: ±0.05. x2(s): ±0.0001 (compiler). c1: 5% (relative error; compiler).

System Components:
  1. Naphthalene, $\ce{ C10H8 }$; [91-20-3] NIST WebBook
  2. Acetonitrile, $\ce{ C2H3N }$; [75-05-8] NIST WebBook
  3. Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
$T$ (°C) $x_{2}$ $C_{1}$ (mol/dm3)
25.0 0.00002.01 x 10-4
25.0 9.6 x 10-32.55 x 10-4
25.0 0.02283.49 x 10-4
25.0 0.03304.66 x 10-4
25.0 0.04696.45 x 10-4
25.0 0.05941.023 x 10-3
25.0 0.07331.417 x 10-3
25.0 0.08872.244 x 10-3
25.0 0.11255.023 x 10-3
25.0 0.13167.164 x 10-3
25.0 0.18980.02745
25.0 0.22800.05116

(a) x2(s): initial mole fraction of binary solvent mixture; c1: molar solubility (mole dm-3) of the solute.

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