Patent ID: 7017388

Claim:
A method of determining the gas-free density of a mixture of an incompressible liquid sample and a compressible gas which comprises subjecting said mixture to at least three different equilibrium pressure states, measuring the temperature and density of the mixture at each of the at least three pressure states, determining the changes in density of the mixture between at least two different pairs of pressure states, and calculating the gas-free density of said incompressible liquid sample by using the equation ρ = 1 V wherein V is the volume of the gas-free liquid at ambient pressure, determined by the equation V = 1 ρ 1 - V 1 = 1 ρ 1 - [ ( 1 ρ 1 - 1 ρ 2 ) ⁢ P 1 ( P 2 - P 1 ) + ( 1 ρ 2 - 1 ρ 3 ) ⁢ P 3 ⁡ ( P 2 - P 1 ) P 1 ⁡ ( P 3 - P 2 ) ] wherein P 1 , P 2 , and P 3 are three different equilibrium ambient pressures, and, ρ 1 , ρ 2 and ρ 3 are the densities of the mixture measured at an equilibrium states P 1 , P 2 and P 3 , respectively.