PolynomialDensity: For dsat of the Liquid phase

dsat = å ai × T i, where the summation is from i = 0 to nTerms - 1.

Evaluation Results:
annotated evaluation results showing fitted parameters (top to bottom): a_0, a_1 [the two terms in this example]

The example is for fitted densities of liquid 1-hexyl-3-methylimidazolium 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide. Densities measured at vapor saturation and 0.1MPa are equivalent at the conditions considered here.